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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Piperazine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Piperazine impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Piperazine-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Piperazine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(±)-2-Methyl-d3-piperazine-2,3,3,5,5,6,6-d7 Stable Isotopes CS-T-100008 2363789-19-7 Enquire
(2R,3R)-2,3-Dimethyl-1-piperazinecarboxylic-d4 Acid 1,1-Dime... Stable Isotopes CS-T-100391 1240583-15-6(Unlabeled) Enquire
1-(2,3-dichlorophenyl)-4-nitrosopiperazine D8 Stable Isotopes CS-O-53624 2989508-28-1 (unlabelled) Enquire
1-(3-Buten-1-yl)-4-(2,3-dichlorophenyl)-piperazine-d8 Stable Isotopes CS-T-100704 2733969-84-9 Enquire
1-(3-Cyano-2-pyridyl)-4-methyl-2-phenylpiperazine-d4 Stable Isotopes CS-T-101646 Not Available Enquire
1-(3-Methoxy-d3-Phenyl)Piperazine Hydrochloride Stable Isotopes CS-O-48632 Not Available In Stock
1-(a,a,a-Trifluoro-m-tolyl)piperazine-d8 Hydrochloride Stable Isotopes CS-T-103182 1189975-78-7 Enquire
1-(Diphenylmethyl)-4-[(1RS,3E)-4-phenyl-1-[(E)-2-phenylethen... Stable Isotopes CS-T-101459 1331643-36-7 Enquire
1,4-Bis(7-chloroquinolin-4-yl)piperazine-d8 Stable Isotopes CS-T-102541 31502-87-1(Unlabelled) Enquire
1,4-Bis(tert-boc)piperazine-d8 Stable Isotopes CS-T-102941 1246816-49-8 Enquire
1,4-Dinitrosopiperazine-d8 Stable Isotopes CS-T-53751 69340-07-4 In Stock
11,11'-(2,2'-(Piperazine-1,4-diyl)bis(acetyl))bis(5H-benzo[e... Stable Isotopes CS-T-102814 Not Available Enquire
1-Benzyl-4-ethylpiperazine-2,3-dione-d5 Stable Isotopes CS-T-101847 Not Available Enquire
1-Bis(4-fluorophenyl)methyl Piperazine-d8 Stable Isotopes CS-T-103117 27469-60-9(Unlabelled) Enquire
1-Boc-4-(6-aminopyridin-3-yl)piperazine-d4 Stable Isotopes CS-T-100753 1808106-94-6 Enquire
1-Cyclopentyl-4-nitrosopiperazine-15N Stable Isotopes CS-T-104106 Not Available Enquire
1-Cyclopentyl-4-nitrosopiperazine-15N3 Stable Isotopes CS-T-104105 Not Available Enquire
1-Ethyl-2,3-dioxopiperazine-d5 Stable Isotopes CS-T-101406 Not Available Enquire
1-Methyl-4-Nitro Piperazine-d11 Stable Isotopes CS-EO-02551 42499-42-3 (Unlabelled) Enquire
1-methyl-4-nitrosopiperazine-d11 Stable Isotopes CS-O-40718 16339-07-4 (Unlabelled) Enquire
1-Phenylpiperazine-d4 Stable Isotopes CS-T-99882 Not Available Enquire
4-​(6-​Methoxy-​3-​pyridinyl)​-​1-​piperazinecarboxylic Acid... Stable Isotopes CS-T-100058 Not Available Enquire
4-​(6-​Nitro-​3-​pyridinyl)​-1-​piperazine-​2,​2,​6,​6-​d4-​... Stable Isotopes CS-T-102709 2089333-15-1 Enquire
4-​(6-​Nitro-​3-​pyridinyl)​-piperazine-​2,​2,​6,​6-​d4 Stable Isotopes CS-T-102710 2089333-08-2 Enquire
4-(2,3-Dichlorophenyl)-1-piperazinecarboxylic Acid 1,1-Dimet... Stable Isotopes CS-T-102712 503315-03-5(Unlabelled) Enquire
4-(6-Nitro-3-pyridinyl)-1-nitroso-piperazine-2,2,6,6-d4 Stable Isotopes CS-T-104125 2089333-13-9 Enquire
4-(8-Chloro-5H-dibenzo[b,e][1,4]diazepin-11-yl)-1-piperazine... Stable Isotopes CS-T-102851 936094-44-9(Unlabelled) Enquire
4-Benzyl-1-piperazineacetic Acid-d8 Hydrazide Stable Isotopes CS-T-102866 24632-70-0(Unlabelled) Enquire
4-Hydroxybenzylpiperazine-d4 Dihydrochloride Stable Isotopes CS-B-00251 75341-33-2(unlabeled freebase) Enquire
4-Methyl-2-phenyl-1-tosylpiperazine-d4 Stable Isotopes CS-T-102224 Not Available Enquire
Aripiprazole-d8 (piperazine-d8) Stable Isotopes CS-T-93678 1089115-06-9 Enquire
Benzyl 4-(6-Amino-2,2-dimethyl-4-(((trifluoromethyl)sulfonyl... Stable Isotopes CS-T-100789 2919702-27-3 Enquire
Cetirizine 1-[(4-Chlorophenyl)phenylmethyl]piperazine Amide-... Stable Isotopes CS-T-100673 Not Available Enquire
m-chlorophenylpiperazine D8 Stable Isotopes CS-EO-02377 1313393-63-3 Enquire
N-(2-((2-(4-(2-(2-Hydroxyethoxy)ethyl)piperazine-d8-1-carbon... Stable Isotopes CS-T-98723 Not Available Enquire
N-(2,6-Dimethylphenyl)-1-piperazine-D8 Stable Isotopes CS-O-47473 Not Available Enquire
N-(Methyl)piperazine-d8 Di-trifluoroacetic Acid Salt Stable Isotopes CS-T-100003 Not Available Enquire
N,N'-bis(2,6-Dimethylphenyl)-1,4-piperazinediacetamide-d8 Stable Isotopes CS-T-100392 2751283-52-8 Enquire
N1,N4-bis(2,6-Dimethylphenyl)-1,4-piperazinediacetamide-D8 Stable Isotopes CS-F-00172 380204-72-8 (unlabelled) Enquire
N-Methyl-N'-nitrosopiperazine-15N Stable Isotopes CS-T-104108 Not Available Enquire
N-Methyl-N'-nitrosopiperazine-15N3 Stable Isotopes CS-T-104107 Not Available Enquire
N-Methyl-N-Nitrosopiperazine-d4 Stable Isotopes CS-T-81300 756524-88-6 In Stock
N-Methyl-N-Nitrosopiperazine-d4 1mg/1ml in Methanol Stable Isotopes CS-O-43183 756524-88-6 In Stock
N-Nitroso Avatrombopag imp-d8 (1-cyclohexyl-4-nitrosopiperaz... Stable Isotopes CS-O-58885 ---- Enquire
N-Nitrosopiperazine-d8 Stable Isotopes CS-T-59645 1330180-56-7 In Stock
Quetiapine-d8 Hemifumarate (piperazine-d8) Stable Isotopes CS-T-95529 1435938-24-1 Enquire
Ramiprilat Diketopiperazine-d5 Stable Isotopes CS-T-97192 Not Available Enquire
Zavegepant-d8 (Piperazine-d8) Stable Isotopes CS-O-51871 1337918-83-8(Unlabelled) Enquire
α-[(2-Methoxyphenoxy)methyl]-1-piperazineethanol-d8 Hydrochl... Stable Isotopes CS-T-101141 1092805-00-9(Free base) Enquire
(3R,6R)-3,6-(Diphenyl-d10)-2,5-piperazinedione Stable Isotopes CS-T-97563 Not Available Enquire
1-(4-Phenyl-1,3-thiazol-2-yl)piperazine-d8 Stable Isotopes CS-T-99886 Not Available Enquire
1,4-Bis(benzhydryl)piperazine-d8 Dihydrochloride Stable Isotopes CS-T-101820 1329634-36-7 Enquire
1,4-Dibenzylpiperazine-d4 Dihydrochloride Stable Isotopes CS-T-89108 118221-01-5 Enquire
1-[[2-[(2-Aminophenyl)amino]-5-methyl-3-thienyl]carbonyl]-4-... Stable Isotopes CS-T-99384 Not Available Enquire
1-Acetyl-4-(2,4-difluorobenzyl)piperazine-d8 Stable Isotopes CS-T-101949 1346598-81-9 Enquire
1-Benzhydrylpiperazine-d8 Stable Isotopes CS-T-95493 1330188-81-2 Enquire
1-Methyl-3-phenylpiperazine-d3 Stable Isotopes CS-T-82432 1189934-96-0 Enquire
1-Methylpiperazine-d4 Dihydrochloride Stable Isotopes CS-T-81878 81586-76-7 Enquire
1-Nitropiperazine-d8 Stable Isotopes CS-T-83083 1794753-23-3 Enquire
2,2'-(4,4'-(Oxybis(butane-4,1-diyl))bis(piperazine-4,1-diyl)... Stable Isotopes CS-T-96162 MA Enquire
2,2’-(1,4-Piperazinediyl)bis-pyrimidine-d8 Stable Isotopes CS-T-102097 Not Available Enquire
3-TRIFLUOROMETHYLPHENYLPIPERAZINE Hydrochloride D4 Stable Isotopes CS-R-00512 15532-75-9(Unlabeled) Enquire
4-(3-Phenothiazin-10-ylpropyl)-1-piperazineethanol-d8 Stable Isotopes CS-T-99135 Not Available Enquire
4-(Phenylmethyl)-1-piperazineacetic Acid 2-[[3-(2,3-Dihydrox... Stable Isotopes CS-T-99872 Not Available Enquire
4-(Pyrrolidin-3-yl)piperazine-1-carboxylic Acid tert-Butyl E... Stable Isotopes CS-T-99853 Not Available Enquire
4-[1-(Phenylmethyl)-3-pyrrolidinyl]-1-piperazinecarboxylic A... Stable Isotopes CS-T-99883 Not Available Enquire
4-Benzylpiperazine-1-carboxylic Acid-d8 tert-Butyl Ester Stable Isotopes CS-T-48990 1216387-74-4 Enquire
Benzyl 4-(2,2-Dimethyl-6-nitro-4-(((trifluoromethyl)sulfonyl... Stable Isotopes CS-T-101850 Not Available Enquire
bis(2,6-Dimethylphenyl)-1,4-piperazinediacetamide-D8 Stable Isotopes CS-F-00086 Not Available Enquire
N-[2-(4-Chlorophenoxy)phenyl]-4-methyl-1-piperazinecarboxami... Stable Isotopes CS-T-100638 Not Available Enquire
N-[2-(Phenylthio)phenyl]-1-piperazine-d8-carboxamide Hydroch... Stable Isotopes CS-T-99133 Not Available Enquire
N-Acetylpiperazine D4 Stable Isotopes CS-T-47337 1398065-90-1 Enquire
N-Boc-N-methylpiperazine-d3 Stable Isotopes CS-T-67999 1459230-58-0 Enquire
N-Dansyl-d6-1-(2-methoxyphenyl)piperazine Stable Isotopes CS-T-98378 Not Available Enquire
N-Methyl-N’-nitrosopiperazine-d4 1mg/1ml in Acetonitrile Stable Isotopes CS-O-43150 756524-88-6 Enquire
Perindopril Diketopiperazine-d4 Stable Isotopes CS-T-97220 Not Available Enquire
Trandolaprilat-d5 Diketopiperazine Stable Isotopes CS-T-97132 Not Available Enquire
Trandolapril-d5 Diketopiperazine Stable Isotopes CS-T-97133 Not Available Enquire
Vardenafil Oxopiperazine-D6 (Impurity) Stable Isotopes CS-T-96772 Not Available Enquire
Vortioxetine-d8 HBr (piperazine-d8) Stable Isotopes CS-C-01429 960203-27-4(Unlabelled) Enquire
α,α'-Bis[(2-Methoxyphenoxy)methyl]-1,4-piperazinediethanol-d... Stable Isotopes CS-T-101808 Not Available Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Homopiperazine API CS-T-26366 505-66-8 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(9-Anthracenylmethyl)piperazine Metabolite CS-F-00002 126257-22-5 Enquire
2,2,14,14-tetramethyl-8-oxopentadecanedioic acid Piperazine ... Metabolite CS-O-52004 2802470-19-3 Enquire
Piperazine N, N-Desethyl Sildenafil Metabolite CS-O-46084 466684-88-8 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(1-Methylpiperidin-4-yl)piperazine Impurity CS-M-25498 23995-88-2 Enquire
1-(2-((2,4-Dimethylphenyl)thio)phenyl)-4-tosylpiperazine Impurity CS-O-54581 1643651-32-4 Enquire
1-(2-Methoxy-2-phenylethyl)piperazine Impurity CS-BL-00030 6722-54-9 Enquire
1-(3-Bromophenyl)piperazine Hydrochloride Impurity CS-T-08796 796856-45-6 In Stock
1-(3-Carboxypyrid-2-yl)-2-phenyl-4-methyl-piperazine HCl Impurity CS-O-56396 61338-13-4(Free salt) Enquire
1-(3-Hydroxypropyl)-4-methylpiperazine Impurity CS-O-16269 5317-33-9 Enquire
1-(Cyclobutylcarbonyl)piperazine hydrochloride Impurity CS-O-54124 1428443-87-1 Enquire
1,1-Dimethylethyl 4-[2-[(2,4-dimethylphenyl)thio]phenyl]-1-p... Impurity CS-O-51715 960203-42-3 Enquire
1,4-Dicyclopropanecarbonylpiperazine Impurity CS-O-52492 458535-34-7 Enquire
1,4-Di-tert-butyl piperazine-1,4-dicarboxylate Impurity CS-T-90502 76535-75-6 In Stock
1-benzhydryl-4-((4-chlorophenyl)(phenyl)methyl)piperazine Impurity CS-O-48909 Not Available Enquire
1-Ethyl-4-((6-((5-fluoro-4-(4-fluoro-1-isopropyl-2-methyl-1H... Impurity CS-O-55135 ---- Enquire
1-Methyl-4-piperidin-4-yl-piperazine (Brigatinib impurity) Impurity CS-M-43629 53617-36-0 Enquire
2,2'-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine... Impurity CS-T-60613 102839-00-9 In Stock
4-(2,3-dichlorophenyl)piperazine-1-carbaldehyde Impurity CS-O-39457 1418125-57-1 In Stock
4-Benzhydryl-1-piperazineethanol Dihydrochloride Impurity CS-T-48648 108983-83-1 Enquire
6-Hydroxy deshydroxyethylpiperazine Dasatinib Impurity CS-O-51483 Not Available Enquire
Acetyl 4-Chloro Benzhydryl Piperazine Impurity CS-EO-02215 802859-64-9 Enquire
Amoxicillin (2R)-Piperazine-2,5-dione Impurity CS-O-60208 210289-70-6 Enquire
Bosutinib 4-piperazine impurity Impurity CS-O-46074 Not Available In Stock
Cariprazine piperazine N-Oxide Urea impurity Impurity CS-O-57572 ---- Enquire
Cephalexin Diketopiperazine Impurity CS-T-10882 59865-11-1 Enquire
Cephalexin Diketopiperazine Formate salt Impurity CS-O-56377 59865-11-1 (Free acid) Enquire
Cephalexin Diketopiperazine Monoacid Impurity CS-T-50478 1323247-65-9 Enquire
Cetirizine 1-​[(4-​Chlorophenyl)​phenylmethyl]​piperazine Am... Impurity CS-O-40876 2724877-99-8 Enquire
Cycloserine Diketopiperazine Impurity CS-T-14073 1204-99-5 Enquire
delta4-Cephalexin Diketopiperazine Impurity CS-O-57944 65870-52-2 Enquire
Despiperazine chloro Enoxacin impurity Impurity CS-O-48713 79286-73-0 Enquire
Doxazosin Piperazine Impurity Impurity CS-O-45834 Not Available Enquire
Enalapril (R)Diketopiperazine methyl ester Impurity CS-O-43368 Not Available Enquire
Enalapril Diketopiperazine Acid Impurity CS-T-54042 115623-21-7 In Stock
Enalapril Diketopiperazine Acid (R-Isomer) Impurity CS-EO-02813 219677-80-2 Enquire
Ethyl 4-[1-oxo-3-(2-phenylhydrazinylidene)butyl]-1-piperazin... Impurity CS-O-50030 1415220-06-2 Enquire
N1,N4-Bis(4-nitrophenyl)-1,4-piperazinediacetamide Impurity CS-BX-02882 294193-70-7 In Stock
Nintedanib Piperazine Dimer Acetyl Impurity Impurity CS-O-56489 2410649-55-5 Enquire
ortho-carbonyl piperazine Olaparib Analogue Impurity CS-O-47417 Not Available Enquire
Palbociclib Piperazine N-Oxide Impurity CS-P-01931 2174002-29-8 In Stock
Palbociclib piperazine-1-carboxylic acid Impurity CS-O-47038 Not Available Enquire
Perindopril Diketopiperazine Impurity CS-T-84845 129970-98-5 In Stock
Pidotimod (2S,5R)-3.6-diketopiperazine derivative Impurity CS-O-46195 325481-51-4 Enquire
Quinapril Diketopiperazine Impurity CS-T-61012 103733-49-9 In Stock
Ribociclib Succinate Piperazine amide impurity Impurity CS-O-49161 3056250-51-9 Enquire
S,S,S-diketopiperazine Impurity CS-O-33688 328385-86-0 In Stock
Vildagliptin Diketopiperazine Impurity CS-O-05593 1789703-36-1 In Stock
Vortioxetine Despiperazine hydrobromide Impurity CS-O-50929 2170362-58-8 Enquire
Zavegepant Piperazine Dimer impurity Impurity CS-O-60615 ---- Enquire
(-)-(2R,5S)-1-Allyl-2,5-dimethylpiperazine Impurity CS-T-01685 155836-78-5 Enquire
(+)-(2S,5R)-1-Allyl-2,5-dimethylpiperazine, (+)-Camphoric Ac... Impurity CS-T-47562 186094-00-8 Enquire
(2R,3R)-2,3-Dimethyl-1-piperazinecarboxylic Acid 1,1-Dimethy... Impurity CS-T-53669 1240583-15-6 Enquire
(2S,5R)-1-Boc-2,5-dimethylpiperazine Impurity CS-T-07529 548762-66-9 Enquire
(2S,5R)-1-Boc-2,5-dimethylpiperazine hydrochloride Impurity CS-DV-00136 1374975-96-8 Enquire
(2S,5S)-tert-Butyl 2,5-dimethylpiperazine-1-carboxylate Impurity CS-DV-00139 1238951-37-5 Enquire
(3R,5R)-3,5-Dimethyl-1-piperazinecarboxylic Acid 1,1-Dimethy... Impurity CS-T-53666 438049-91-3 Enquire
(R)-1-Benzoyl-4-(4-iodophenyl)sulfonyl-3-methylpiperazine Impurity CS-AC-04164 948990-71-4 Enquire
(R)-1-Boc-2-isopropyl-piperazine Impurity CS-AC-04152 674792-04-2 Enquire
(R)-1-Boc-piperazine-3-carboxylic acid Impurity CS-AC-08268 192330-11-3 Enquire
(R)-1-N-Cbz-piperazine-2-carboxylic acid methyl ester Impurity CS-AC-04181 126937-43-7 Enquire
(R)-2-Ethylpiperazine Dihydrochloride Impurity CS-T-23134 438050-07-8 Enquire
(R)-3-Isopropyl-2,5-piperazinedione Impurity CS-AC-03511 143673-66-9 Enquire
(R)-N-1-Boc-n-4-cbz-2-piperazine carboxylic acid Impurity CS-AC-04794 138775-02-7 Enquire
(S)-1-BOC-4-[2-(Cbz-Amino)isopentanoyl]piperazine Impurity CS-AC-04255 1420804-55-2 Enquire
(S)-1-N-Boc-4-N-Fmoc-piperazine-2-carboxylic acid Impurity CS-AC-08798 1034574-30-5 Enquire
(S,S)-3-Isopropyl-6-methylpiperazine-2,5-dione Impurity CS-AC-04997 15136-26-2 Enquire
{3-[(5-chloropyridin-2-yl)carbamoyl]pyrazin-2-yl}methyl 4-me... Impurity CS-O-39243 Not Available Enquire
1-({1-[(3,5-Dimethylisoxazol-4-yl)sulfonyl]-piperidin-4-yl}a... Impurity CS-M-28877 1185302-54-8 Enquire
1-(2-(4-(2-(3,3-dimethyl)-2-oxopiperazine-1-yl)acetyl)phenox... Impurity CS-O-36849 Not Available Enquire
1-(2,3-Dihydro-1H-inden-2-yl)piperazine dihydrochloride Impurity CS-M-47786 23912-70-1 Enquire
1-(2,3-Dihydro-benzo[1,4]dioxin-6-yl)-piperazine Impurity CS-M-07625 148245-18-5 Enquire
1-(2-Chloroethyl)-4-methylpiperazine hydrochloride Impurity CS-M-26631 5753-26-4 Enquire
1-(2-Ethylphenyl)piperazine Impurity CS-M-26083 40224-10-0 Enquire
1-(2-Fluorobenzyl)piperazine Impurity CS-DJ-01109 89292-78-4 Enquire
1-(2-Fluoro-benzyl)-piperazine Hydrochloride Impurity CS-M-16252 435345-41-8 Enquire
1-(2-Oxo-2-pyrrolidin-1-ylethyl)piperazine Impurity CS-M-25928 39890-45-4 Enquire
1-(2-Phenoxyethyl)piperazine Impurity CS-M-08235 13484-37-2 Enquire
1-(2-Pyridin-4-ylethyl)piperazine Impurity CS-M-25666 53345-16-7 Enquire
1-(2-Thien-2-ylethyl)piperazine Impurity CS-M-25685 461046-73-1 Enquire
1-(3-Chloro-2-methylpropyl)-4-methylpiperazine Dihydrochlori... Impurity CS-T-72170 102449-98-9 Enquire
1-(3-chloropropyl )4-phenyl piperazine hydrochloride Impurity CS-O-51633 55974-35-1 Enquire
1-(3-Fluoro-benzyl)-piperazine Impurity CS-M-07098 55513-19-4 Enquire
1-(3-Hydroxy-phenyl)-piperazine-4-carboxylic acid tert-butyl... Impurity CS-T-78112 198627-86-0 Enquire
1-(3-Iodo-pyridin-2-yl)-piperazine Impurity CS-M-08675 85386-98-7 Enquire
1-(3-Methoxypropyl)piperazine Impurity CS-DJ-01006 88708-40-1 Enquire
1-(3-Methylphenyl)piperazine Impurity CS-M-25823 41186-03-2 Enquire
1-(4-Benzyloxy-3-chlorophenyl)piperazine Impurity CS-T-05985 800371-67-9 Enquire
1-(4-Chloro-1,2,5-thiadiazol-3-yl)-4-methylpiperazine Impurity CS-M-26547 870987-89-6 Enquire
1-(4-Chloro-benzenesulfonyl)-piperazine Impurity CS-M-06962 16017-53-1 Enquire
1-(4-Chlorophenyl)piperazine Impurity CS-M-25861 38212-33-8 Enquire
1-(4-Cyano-benzyl)-piperazine Impurity CS-DL-00634 89292-70-6 Enquire
1-(4-Fluoro-benzenesulfonyl)-piperazine Impurity CS-M-08489 27106-49-6 Enquire
1-(5-Iodo-pyridin-2-yl)-piperazine Impurity CS-M-15795 219635-89-9 Enquire
1-(5-Isoquinolinesulfonyl)-2-methylpiperazine Dihydrochlorid... Impurity CS-T-30061 108930-17-2 Enquire
1-(5-Isoquinolinesulfonyl)-3-methylpiperazine Hydrochloride Impurity CS-T-30064 141543-65-9 Enquire
1-(5-Isoquinolinesulfonyl)piperazine Hydrochloride Impurity CS-T-30066 141543-63-7 Enquire
1-(6-(6-acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrid... Impurity CS-O-39717 Not Available Enquire
1-(8-Chloro-5-isoquinolinesulfonyl)piperazine Dihydrochlorid... Impurity CS-T-11828 355115-40-1 Enquire
1-(bis(4-fluorophenyl)methyl)-4-(3-phenylpropyl)piperazine Impurity CS-O-40422 336194-51-5 Enquire
1-(Naphthalene-2-sulfonyl)-piperazine Impurity CS-M-06961 179051-76-4 Enquire
1-(Oxetan-3-yl)piperazine Impurity CS-DL-00658 1254115-23-5 Enquire
1-(Tetrahydro-2H-pyran-4-yl)piperazinedihydrochloride Impurity CS-M-28197 790223-65-3 Enquire
1-(Tetrahydro-furan-2-ylmethyl)-piperazine Impurity CS-M-09041 82500-35-4 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-1-[(4-Chlorophenyl)phenylmethyl]piperazine Intermediate CS-T-12409 300543-56-0 Enquire
(S)-2-tert-Butylcarboxamide-4-tert-butoxycarbonyl piperazine Intermediate CS-T-09303 150323-35-6 In Stock
1-(3,4-Dichlorophenyl)piperazine Intermediate CS-O-15301 57260-67-0 In Stock
1-(3-Carboxy-2-pyridyl)-4-methyl-2-phenylpiperazine Intermediate CS-T-10477 61338-13-4 In Stock
1-(3-Chlorophenyl)piperazine dihydrochloride Intermediate CS-O-43023 51639-49-7 In Stock
1-(3-Chlorophenyl)piperazine hydrochloride (1:x) Intermediate CS-M-25830 65369-76-8 In Stock
1-(3-Methoxyphenyl)-Piperazine monohydrochloride Intermediate CS-O-48637 16015-70-6 In Stock
1-(4,4'-Dichlorobenzhydryl)piperazine Intermediate CS-EL-02263 27469-61-0 In Stock
1-(4-Amino Phenyl) 4-(4-Methoxy Phenyl) Piperazine Intermediate CS-T-32811 74852-62-3 In Stock
1-(4-Aminophenyl)-4-(4-hydroxyphenyl)piperazine Intermediate CS-O-16215 74853-08-0 In Stock
1-(4-Hydroxyphenyl)piperazine Intermediate CS-T-78527 56621-48-8 In Stock
1-(4-Methoxyphenyl)-4-(4-nitrophenyl)piperazine Intermediate CS-T-32800 74852-61-2 In Stock
1-(Cyclopropylcarbonyl)piperazine hydrochloride Intermediate CS-M-35612 1021298-67-8 In Stock
1,1-Dimethylethyl (2R)-2-(cyanomethyl)-1-piperazinecarboxyla... Intermediate CS-O-49935 2387560-41-8 Enquire
1,1-Dimethylethyl (2S)-2-[(1S)-1-hydroxyethyl]-1-piperazinec... Intermediate CS-O-50085 1932146-94-5 Enquire
1,1-Dimethylethyl 2-(1-hydroxy-1-methylethyl)-1-piperazineca... Intermediate CS-O-50082 1263316-20-6 Enquire
1,4-Bis(2-hydroxyethyl)piperazine Intermediate CS-DE-00848 122-96-3 In Stock
1-Benzo[1,3]dioxol-5-ylmethyl-piperazine Intermediate CS-M-23173 32231-06-4 In Stock
1-Phenylpiperazine Intermediate CS-M-57456 92-54-6 In Stock
2-Methylpiperazine Intermediate CS-M-57244 109-07-9 In Stock
N-(2,6-Dimethylphenyl)-1-piperazineacetamide Intermediate CS-O-31488 5294-61-1 In Stock
N-(2-Hydroxyethyl)piperazine Intermediate CS-M-57750 103-76-4 In Stock
N,4-Bis[2-(2-aminoethoxy)ethyl]-1-piperazineethanamine Intermediate CS-ED-42258 2344685-60-3 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-1-Boc-2-propyl-piperazine Fine Chemicals CS-O-49940 1212252-88-4 Enquire
1-(2,3-dichorophenyl)4-(2-(2-isocyanatocyclohexyl)ethyl)pipe... Fine Chemicals CS-O-59567 ---- Enquire
1-(2,5-dichlorophenyl)piperazine hydrochloride Fine Chemicals CS-O-53763 119438-13-0 Enquire
1-(3-Bromophenyl)-4-(3-chloropropyl)piperazine Fine Chemicals CS-O-50305 328410-01-1 In Stock
1-(3-Chloro-2-methylphenyl)piperazine hydrochloride Fine Chemicals CS-ED-41881 796856-42-3 Enquire
1-(4-Bromophenyl)piperazine Fine Chemicals CS-AC-04200 66698-28-0 In Stock
1-(6-Nitropyridin-3-yl)piperazine hydrochloride Fine Chemicals CS-ED-02234 1221726-34-6 In Stock
1-(Cyclopropylcarbonyl)piperazine Fine Chemicals B020377-25GM 59878-57-8 In Stock
1,1-Dimethylethyl (2R)-2-cyclopropyl-1-piperazinecarboxylate Fine Chemicals CS-O-49936 1240584-61-5 Enquire
1-Methylpiperazine Fine Chemicals CS-T-58589 109-01-3 In Stock
2,6-Dimethylpiperazine Fine Chemicals CS-T-20510 108-49-6 In Stock
4-(2-Amino-ethyl)-3-methyl-piperazine-1-carboxylic acid tert... Fine Chemicals CS-ZI-41294 1353954-69-4 In Stock
Piperazine citrate Fine Chemicals CS-O-10193 144-29-6 In Stock
Piperazine Hexahydrate Fine Chemicals CS-DE-00660 142-63-2 In Stock
Piperazine Hexahydrate Fine Chemicals CS-O-59461 142-63-2 Enquire
tert-Butyl (2R)-2-(2-hydroxyethyl)piperazine-1-carboxylate Fine Chemicals CS-O-49937 947275-74-3 Enquire
(R)-1-Boc-2-butyl-piperazine Fine Chemicals CS-O-49941 1212133-43-1 Enquire
(S)-2-(Trifluoromethyl)piperazine Fine Chemicals CS-ZJ-30845 1187931-35-6 Enquire
(S)-Benzyl 2-(cyanomethyl)piperazine-1-carboxylate hydrochlo... Fine Chemicals CS-ED-02300 2158302-02-2 Enquire
1-(2,6-Difluorobenzyl)piperazine Fine Chemicals CS-DJ-00867 874774-61-5 Enquire
1-(3-hydroxypropyl)-4-(3-chloropropyl) piperazine Fine Chemicals CS-O-33734 59209-45-9 Enquire
1-(3-Methoxyphenyl)piperazine Fine Chemicals CS-M-25822 16015-71-7 Enquire
1-(4-Fluoro-2-nitrophenyl)piperazine Fine Chemicals CS-M-02710 243128-46-3 Enquire
1,1-Dimethyl-4-(2-methyl-4H-3-thia-benzo-[f]azulen-10-yl)-pi... Fine Chemicals CS-O-38374 Not Available Enquire
1,1'-Ethylenedipiperazine Fine Chemicals CS-O-39726 19479-83-5 Enquire
1,4-Bis[(tetrahydro-2-furanyl)carbonyl]-piperazine Fine Chemicals CS-T-68397 547730-06-3 Enquire
1,4-dimethyl-2-phenylpiperazine Fine Chemicals CS-ED-01421 5271-29-4 Enquire
1-Allyl-piperazine Fine Chemicals CS-M-04450 13961-36-9 Enquire
1-Amino-4-methylpiperazine Fine Chemicals CS-ED-02412 6928-85-4 Enquire
1-benzyl 4-tert-butyl 2-methyl piperazine-1,2,4-tricarboxyla... Fine Chemicals CS-O-39668 126937-42-6 Enquire
1-Cyclohexyl-4-[3-(1,2,3,4-tetrahydro-5-methoxy-1-naphthalen... Fine Chemicals CS-ZB-32348 172907-03-8 Enquire
1-Formyl-4-methylpiperazine Fine Chemicals CS-ED-01992 7556-55-0 Enquire
1-Hexylpiperazine Fine Chemicals CS-M-25809 51619-55-7 Enquire
1-Nitropiperazine Fine Chemicals CS-T-59603 42499-41-2 Enquire
1-Piperazinepropanol Fine Chemicals CS-ED-01801 5317-32-8 Enquire
1-Tosylpiperazine hydrochloride Fine Chemicals CS-DB-00144 856843-84-0 Enquire
3-(5-chloropyridine-2-carbamoyl)-2-(4-methyl-piperazine-1-ca... Fine Chemicals CS-O-34690 Not Available Enquire
4-(tert-Butoxycarbonyl)piperazine-1-carboxylic acid Fine Chemicals CS-ED-01901 356517-38-9 Enquire
4-Benzhydryl-1-piperazineethanol Fine Chemicals CS-O-33164 10527-64-7 Enquire
5,5'-(Piperazine-2,5-diyl)bis(2-hydroxybenzamide) Fine Chemicals CS-T-93474 Not Available Enquire
5,5'-(piperazine-2,5-diyl)bis(2-hydroxybenzamide) Fine Chemicals CS-O-38320 2517940-02-0 Enquire
Benzyl (R)-2-(cyanomethyl)-3-oxopiperazine-1-carboxylate Fine Chemicals CS-O-40572 Not Available Enquire
Benzyl (R)-2-(cyanomethyl)piperazine-1-carboxylate Fine Chemicals CS-O-40682 2306255-32-1 Enquire
Benzyl (S)-2-(cyanomethyl)-3-oxopiperazine-1-carboxylate Fine Chemicals CS-O-40571 Not Available Enquire
Benzyl (S)-2-(Cyanomethyl)piperazine-1-carboxylate Fine Chemicals CS-T-94136 2158302-01-1 Enquire
Benzyl (Z)-2-(cyanomethylene)-3-oxopiperazine-1-carboxylate Fine Chemicals CS-O-40570 Not Available Enquire
Benzyl (Z)-2-(cyanomethylene)piperazine-1-carboxylate Fine Chemicals CS-O-40569 Not Available Enquire
Benzyl-2-(cyanomethylene)-3-oxopiperazine-1-carboxylate Fine Chemicals CS-O-40610 Not Available Enquire
Benzyl-2-(cyanomethylene)piperazine-1-carboxylate Fine Chemicals CS-O-40609 Not Available Enquire
N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(4-methoxyphenoxy)prop... Fine Chemicals CS-T-93442 1393717-45-7 Enquire
N-(p-Chlorobenzhydryl)piperazine dihydrochloride Fine Chemicals CS-ZH-30003 1031-92-1 Enquire
N,N-Diethyl-4-methyl-1-piperazinecarboxamide Fine Chemicals CS-MM-79413 90-89-1 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(3-(2-methoxy-5-nitrophenoxy)propyl)-4-nitrosopiperazine Nitrosamine CS-O-53957 ---- Enquire
1-(3-Methoxyphenyl)-4-nitrosopiperazine Nitrosamine CS-ED-42186 2763779-41-3 In Stock
1-(3-methyl-1-phenyl-1H-pyrazol-5-yl)-4-nitrosopiperazine Nitrosamine CS-O-46603 Not Available Enquire
1-(4-bromo-2-((2,4-dimethylphenyl)thio)phenyl)-4-nitrosopipe... Nitrosamine CS-O-48937 Not Available Enquire
1-(4-chlorophenyl)-4-nitrosopiperazine Nitrosamine CS-O-53192 873395-52-9 In Stock
1,4-Dinitrosopiperazine Nitrosamine CS-T-20729 140-79-4 In Stock
1-Acetyl-4-nitrosopiperazine Nitrosamine CS-EO-03243 73742-56-0 In Stock
1-Benzo[1,3]dioxol-5-ylmethyl-4-Nitroso piperazine Nitrosamine CS-O-52331 Not Available In Stock
1-Benzyl-4-nitrosopiperazine Nitrosamine CS-T-05844 40675-45-4 In Stock
1-Cyclopentyl-4-nitrosopiperazine Nitrosamine CS-ED-01323 61379-66-6 In Stock
1-cyclopropylmethyl-4-nitrosopiperazine Nitrosamine CS-O-47823 Not Available In Stock
1-Ethyl-4-nitrosopiperazine Nitrosamine CS-ED-01202 65504-33-8 In Stock
1-methyl-4-(1-nitrosohexahydropyridine-4-yl)piperazine Nitrosamine CS-O-57939 2089333-01-5 In Stock
1-Nitroso-4-phenylpiperazine Nitrosamine CS-T-59643 14340-33-1 In Stock
2-Methyl-1,4-dinitrosopiperazine Nitrosamine CS-EO-03251 55556-94-0 In Stock
2-methyl-1-nitrosopiperazine Nitrosamine CS-O-44469 1172850-85-9 Enquire
4-(2-Chlorophenyl)-1-nitrosopiperazine Nitrosamine CS-O-50115 2221987-86-4 In Stock
4-(3-chlorophenyl)-1-nitrosopiperazine Nitrosamine CS-T-94254 2219339-13-4 In Stock
4-(4-nitrosopiperazine-1-yl)phenol Nitrosamine CS-O-51223 Not Available Enquire
Cefalexin Nitroso Diketopiperazine Nitrosamine CS-O-53647 ---- Enquire
Cefalexin Nitroso Diketopiperazine Monoacid Nitrosamine CS-O-53648 ---- Enquire
Di-Nitroso Venetoclax piperazine impurity-1 Nitrosamine CS-O-58212 ---- Enquire
Di-Nitroso Venetoclax piperazine impurity-2 Nitrosamine CS-O-58213 ---- Enquire
N-Methyl-N’-nitrosopiperazine Nitrosamine CS-T-81242 16339-07-4 In Stock
N-nitroso (R)-1-[(4-Chlorophenyl)phenylmethyl]piperazine Nitrosamine CS-SN-00119 Not Available In Stock
N-Nitroso 1-(3-Chlorobenzhydryl) piperazine Nitrosamine CS-BX-02746 1706351-82-7 In Stock
N-Nitroso Avatrombopag imp (1-cyclohexyl-4-nitrosopiperazine... Nitrosamine CS-O-58883 ---- Enquire
N-Nitroso Brexpiprazole piperazine intermediate Nitrosamine CS-O-46062 2639426-95-0 In Stock
N-Nitroso Venetoclax piperazine impurity Nitrosamine CS-O-58211 ---- Enquire
N-Nitroso-N′-carbethoxypiperazine Nitrosamine CS-O-50089 13256-15-0 In Stock
N-Nitrosopiperazine Nitrosamine CS-T-37282 5632-47-3 In Stock
N-Nitrosopiperazine L-5 methyltetrahydrofolate calcium Nitrosamine CS-EO-02667 Not Available Enquire
N-nitrosopiperazine Palbociclib Nitrosamine CS-O-37587 ---- In Stock
Tert-butyl 4-nitrosopiperazine-1-carboxylate Nitrosamine CS-ED-02048 877177-42-9 In Stock
N-nitroso Chlorophenyl-Piperazine Nitrosamine CS-O-38992 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(3R,6R)-3,6-Diphenylpiperazine-2,5-dione Secondary Standards CS-SS-26454 31485-02-06 Enquire
Lisinopril R,S,S-diketopiperazine Secondary Standards CS-SS-26363-50MG 219677-82-4 Enquire
Lisinopril S,S,S-diketopiperazine Secondary Standards CS-SS-26374-50MG 328385-86-0 Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(±)-2-Methylpiperazine-2,3,3,5,5,6,6-d7 Stable Isotope Reagent CS-C-02121 1219802-98-8 Enquire
1-(Ethyl-d5)piperazine Stable Isotope Reagent CS-O-60141 246817-21-9 Enquire
1-Cyclopentyl-4-nitrosopiperazine-D8 Stable Isotope Reagent CS-O-45510 Not Available Enquire
1-Cyclopentyl-4-Nitrosopiperazine-d9 Stable Isotope Reagent CS-O-45509 Not Available In Stock
1-Isopropyl-d7-piperazine Stable Isotope Reagent CS-C-01636 2089679-76-3 Enquire
1-Methyl-4-nitrosopiperazine-D8 Stable Isotope Reagent CS-O-45508 Not Available Enquire
1-Piperazine-d8 -acetic Acid 2HCl Stable Isotope Reagent CS-C-02045 Not Available Enquire
2-Oxopiperazine-3,3,5,5,6,6-d6 Stable Isotope Reagent CS-C-01651 1219803-71-0 Enquire
Ethyl 1-Piperazine-d8-acetate 2HCl Stable Isotope Reagent CS-C-01965 Not Available Enquire
N-(Methyl-d3)-N-Nitrosopiperazine Stable Isotope Reagent CS-T-80092 1184974-41-1 In Stock
N-methyl-d3-homopiperazine Stable Isotope Reagent CS-C-02111 2488857-81-2 Enquire
N-Methyl-d3-piperazine-2,2,3,3,5,5,6,6-d8 Stable Isotope Reagent CS-C-02120 1319723-22-2 Enquire
N-Methylpiperazine-3,3,5,5-d4 Stable Isotope Reagent CS-T-93904 343864-02-8 In Stock
Piperazine-d8 Stable Isotope Reagent CS-O-30499 134628-42-5 In Stock
Tert-Butyl 4-(3-Methoxy-d3-Phenyl) Piperazine-1-Carboxylate Stable Isotope Reagent CS-O-48631 Not Available In Stock
1-methyl-4-nitrosopiperazine-d11 200μg/mL in Methanol Stable Isotope Reagent CS-O-40717 16339-07-4(Unlabelled) Enquire
1-methyl-4-nitrosopiperazine-d4 200μg/mL in Methanol Stable Isotope Reagent CS-O-40719 756524-88-6 Enquire


Pharmaceutical Stds.

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(3-Bromopropyl)-4-(3-chlorophenyl)piperazine Pharmaceutical Stds. CS-TA-72745 142944-48-7 Enquire


Steroids

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
delta-9(11)-Estrone sulfate piperazine salt Steroids CS-O-43429 1313382-30-7 Enquire


Analytical Standard

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Cyclopentyl-4-nitrosopiperazine Analytical Standard CS-ED-01323-10MG 61379-66-6 Enquire
1-cyclopentyl-4-nitroso-piperazine (CPNP)-100 PPM in Acetoni... Analytical Standard CS-ED-01323-1.5ML 61379-66-6 Enquire
1-methyl-4-nitrosopiperazine (MNP)-100 PPM in Acetonitrile Analytical Standard CS-T-81242-1.5ML 16339-07-4 Enquire
N-Methyl-N’-nitrosopiperazine Analytical Standard CS-T-81242-10MG 16339-07-4 Enquire


Fluorinated Compounds

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-(Trifluoromethyl)piperazine Fluorinated Compounds CS-O-58076 131922-05-9 Enquire


Heterocyclic

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Phenylpiperazine Heterocyclic CS-EL-24726 5271-26-1 Enquire


Biochemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Piperazine Anhydrous pure, 98% Biochemicals CS-SR-00390 110-85-0 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-Piperazine-2-carboxylic acid dihydrochloride Building Blocks CS-M-57532 126330-90-3 In Stock
1,1-Dimethylethyl 4-cyano-1-piperazinecarboxylate Building Blocks CS-O-48974 113534-02-4 In Stock
1-Acetylpiperazine Building Blocks CS-DV-00815 13889-98-0 In Stock
1-BOC-4-(2-Hydroxyethyl) Piperazine Building Blocks CS-O-58298 77279-24-4 Enquire
1-Cyclobutanecarbonylpiperazine Building Blocks CS-O-46690 64579-67-5 Enquire
4-Methyl-1-piperazinecarbonyl chloride hydrochloride Building Blocks CS-T-96063 55112-42-0 Enquire
N,N-dimethylpiperazine-1-carboxamide Building Blocks CS-O-48410 41340-78-7 Enquire
Piperazine hydrate Building Blocks CS-ED-41720 16832-43-2 Enquire
(R)-1-N-Boc-2-methylpiperazine Building Blocks CS-M-53017 170033-47-3 Enquire
(S)-1-N-Boc-2-methylpiperazine Building Blocks CS-M-53018 169447-70-5 Enquire
(S)-1-N-Boc-Piperazine-2-carboxylic acid methyl ester Building Blocks CS-M-53019 796096-64-5 Enquire
1,4-Diethylpiperazine Building Blocks CS-O-41792 6483-50-7 Enquire
1-[4-(Trifluoromethyl)benzyl]piperazine Building Blocks CS-M-17227 107890-32-4 Enquire
1-Methyl-4-phenylpiperazine Building Blocks CS-ZH-23023 3074-43-9 Enquire
1-N-Boc-2-fluoromethylpiperazine Building Blocks CS-T-67107 1017789-35-3 Enquire
2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-(4-hydroxyph... Building Blocks CS-O-35966 205934-08-3 Enquire
2-(trifluoromethyl)piperazine Building Blocks CS-DV-01165 131922-05-9 Enquire
2,3-dioxopiperazine-1-carboxylic acid Building Blocks CS-O-36336 Not Available Enquire
4-Fmoc-piperazine-2-carboxylic acid Building Blocks CS-T-75369 219312-90-0 Enquire
4-N-Boc-2-hydroxymethylpiperazine Building Blocks CS-AC-04876 301673-16-5 Enquire
Fmoc-(4-carboxymethyl)piperazine Building Blocks CS-M-30113 180576-05-0 Enquire
N-[(2-tert-Butyl-6-chlorobenzoxazol-7-yl)sulfonyl]piperazine Building Blocks CS-O-43588 960495-44-7 Enquire
N-Boc-3-Ethylpiperazine Building Blocks CS-M-54877 438049-35-5 Enquire


Deuterated Reagents

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-​(METHYL-​D3)​PIPERAZINE 2HCL Deuterated Reagents CS-O-42051 2043778-87-4 In Stock
1-[3-(Methoxy-d3)phenyl]piperazine Deuterated Reagents CS-O-48068 1961287-54-6 Enquire
1-[4-BROMOPHENYL)-4-(METHYL-D3)PIPERAZINE Deuterated Reagents CS-O-42432 2140327-15-5 Enquire
1,4-Piperazinediethylamine-d8 Deuterated Reagents CS-T-94288 2733571-66-7 Enquire
N-Boc-N-methylpiperazine-d8 Deuterated Reagents CS-T-68391 1189436-83-6 Enquire
N-Ethylpiperazine-d5 Bis(trifluoroacetic Acid) Salt Deuterated Reagents CS-T-77897 1246817-22-0 Enquire
N-Methylpiperazine D8 Deuterated Reagents CS-O-16257 917358-65-7 Enquire