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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Butanoic Acid, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Butanoic Acid 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 Butanoic Acid-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.

Butanoic Acid Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(2R)-2-(Acetylamino)butanoic Acid-d3 Stable Isotopes CS-T-97068 Not Available Enquire
(2R)-2-(Acetylamino)butanoic Acid-d5 Stable Isotopes CS-T-100940 Not Available Enquire
(2R)-2-Methyl-butanoic Acid Ethyl Ester-d5 Stable Isotopes CS-T-97314 Not Available Enquire
(2R)-2-Methyl-butanoic Acid Methyl Ester-d3 Stable Isotopes CS-T-97315 Not Available Enquire
(2S)-2-Methyl-butanoic Acid Ethyl Ester-d5 Stable Isotopes CS-T-97312 Not Available Enquire
(2S)-2-Methyl-butanoic Acid Methyl Ester-d3 Stable Isotopes CS-T-97313 Not Available Enquire
(2S,3S)-3-Hydroxy-2-methylbutanoic Acid-d3 Stable Isotopes CS-T-97426 Not Available Enquire
(2Z)-Methyl 4-Bromo-2-(methoxyimino)-3-oxo-butanoic Acid Est... Stable Isotopes CS-T-100044 Not Available Enquire
(cis/trans)-2-(4-Benzofurazanylmethylene)-3-oxo-butanoic Aci... Stable Isotopes CS-T-101862 1185237-60-8 Enquire
(E)-2-[(2-Chlorophenyl)methylene]-4-[2-(1,3-dihydro-1,3-diox... Stable Isotopes CS-T-101679 Not Available Enquire
(R)​-2,​4-Diamino-Butanoic acid Dihydrochloride-d3 (major) Stable Isotopes CS-T-103060 Not Available Enquire
(R)​-2,​4-Diamino-Butanoic acid Dihydrochloride-d3 (majo... Stable Isotopes CS-T-94875 Not Available Enquire
(S)-2-Di(tert-butyloxycarbonyl)amino-4-cyano-13C-butanoic Ac... Stable Isotopes CS-T-96977 Not Available Enquire
(Z)-2-[(2-Chlorophenyl)methylene]-4-[2-(1,3-dihydro-1,3-diox... Stable Isotopes CS-T-101680 Not Available Enquire
2-(Acetylamino)butanoic Acid-d5 Stable Isotopes CS-T-100929 Not Available Enquire
3,3-Dimethylbutanoic Acid-d9 Stable Isotopes CS-T-102552 1070-83-3(Unlabelled) Enquire
4-​(Dimethyloxidoamino)​butanoic Acid-d6 Hydrochloride Stable Isotopes CS-T-96719 Not Available Enquire
4-(1-Methyl-d3-5-morpholino-1H-benzo[d]imidazol-2-yl)butanoi... Stable Isotopes CS-T-100071 Not Available Enquire
4-(2,4-Dichlorophenoxy)butanoic Acid-13C6 Stable Isotopes CS-T-96249 Not Available Enquire
4,4,4-Trifluorobutanoic acid- d4 Stable Isotopes CS-T-100996 Not Available Enquire
4,4,4-Trifluorobutanoic acid-13C3 Stable Isotopes CS-T-100997 Not Available Enquire
4-hydroxybutanoic acid - D6 Stable Isotopes CS-O-39273 362044-72-2 Enquire
JWH 073 N-butanoic acid-D7 Stable Isotopes CS-T-102704 1307803-52-6(Unlabelled) Enquire
Vitamin B6 4-(N-(Butanoic Acid-d6))-N-hydroxysuccinimide Stable Isotopes CS-T-99731 Not Available Enquire
y-Oxo-1-pyrenebutanoic Acid-13C4 Stable Isotopes CS-T-96689 Not Available Enquire
(+/-)-2-Acetylaminobutanoic Acid-d3 Stable Isotopes CS-T-64343 1219397-36-0 Enquire
(aR,ßR)-ß-(2,4-Difluorophenyl)-ß-hydroxy-a-methyl-1H-1,2,4-t... Stable Isotopes CS-T-89880 1329610-75-4 Enquire
(Z)-2-(Methoxyimino)-3-oxobutanoic Acid-d3 Methyl Ester Stable Isotopes CS-T-80999 1331636-65-7 Enquire
[1-Methyl-5-bis(2’-hydroxyethyl)aminobenzimidazolyl-2]butano... Stable Isotopes CS-T-81585 1286887-71-5 Enquire
[1-Methyl-5-bis(2’-hydroxyethyl)aminobenzimidazolyl-2]butano... Stable Isotopes CS-T-80733 1276499-54-7 Enquire
1-Methyl-5-amino-1H-benzimidazole-2-butanoic Acid Ethyl Este... Stable Isotopes CS-T-80357 1246819-70-4 Enquire
1-Methyl-5-nitro-1H-benzimidazole-2-butanoic Acid Ethyl Este... Stable Isotopes CS-T-58448 3543-72-4(Unlabeled) Enquire
2-(2-Nitrobenzylidene)-3-oxobutanoic Acid, 2-Acetoxy-2-methy... Stable Isotopes CS-T-83168 1185235-10-2 Enquire
2-Oxobutanoic Acid-13C,d5 Sodium Salt Stable Isotopes CS-T-84408 1286996-74-4 Enquire
3-Oxobutanoic Acid 2-Acetoxy-2-methylpropyl Ester-d6 Stable Isotopes CS-T-84452 1185147-99-2 Enquire
4-Amino-3-hydroxy Butanoic Acid Methyl Ester Hydrochloride-d... Stable Isotopes CS-T-100865 Not Available Enquire
4-Anilino-4-oxobutanoic Acid-d5 Stable Isotopes CS-T-48266 840529-98-8 Enquire
DL-2-Hydroxy-4-(methylthio)butanoic Acid-13C4 Stable Isotopes CS-T-78930 1215556-82-3 Enquire
JWH-073 (Indole-d5) Butanoic Acid Stable Isotopes CS-T-56951 1320363-50-5 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-(Naphthalen-1-yl)-4-oxobutanoic Acid API CS-T-38313 4653-13-8 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxybutanoic acid sodium Metabolite CS-EK-00422 502-85-2 Enquire
JWH073-butanoic acid metabolite Metabolite CS-EK-01830 1307803-52-6 Enquire
(N-(4-hydroxy-3-methylene-butanoic acid) nornalbuphine (M1) Metabolite CS-O-41422 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(3S)-3-amino-4-(2,4,5-trifluorophenyl)butanoic acid Impurity CS-O-43279 1217854-08-4 Enquire
(S)-2-Aminobutanoic Acid Hydrochloride Impurity CS-T-02090 5959-29-5 Enquire
[R-(R*,S*)]-α-[(1-Carboxyethyl)amino]-γ-oxo-benzenebutanoic ... Impurity CS-T-71142 105167-27-9 In Stock
2,2’-(Ethanediyldiimino)bis-butanoic Acid(Mixture of Diaster... Impurity CS-T-22227 498-17-9 In Stock
2-[(2-Chlorophenyl)methylene]-4-[2-(1,3-dihydro-1,3-dioxo-2H... Impurity CS-T-72617 400024-08-0 Enquire
2-amino-2-phenylbutanoic acid Impurity CS-O-44768 5438-07-3 Enquire
2-amino-3-(3-methyl-3H-diazirin-3-yl)butanoic acid Impurity CS-O-55197 851961-06-3 Enquire
2-Amino-3-methyl-3-sulfino-4-(1H-1,2,3-triazol-1-yl)butanoic... Impurity CS-T-47951 118175-11-4 Enquire
3-​amino-​4-​(2,​4,​5-​trifluorophenyl)​butanoic acid hydroc... Impurity CS-N-05271 1909337-07-0 Enquire
4-(((2S,4R)-1-([1,1'-Biphenyl]-4-yl)-5-isopropoxy-4-methyl-5... Impurity CS-O-40504 2514965-95-6 In Stock
4-(4-Nitrophenyl)Butanoic Acid Impurity CS-M-47419 5600-62-4 In Stock
4-(Dimethylamino)Butanoic Acid Hydrochloride Impurity CS-M-25948 69954-66-1 In Stock
4-Hydroxybutanoic Acid Impurity CS-DV-02824 591-81-1 Enquire
Palbociclib oxobutanoic acid Impurity Impurity CS-O-35203 1974279-21-4 In Stock
(+/-)-2-Acetylaminobutanoic Acid Impurity CS-T-47086 114285-09-5 Enquire
(2R)-2-bromo-Butanoic acid methyl ester Impurity CS-DV-00112 114438-75-4 Enquire
(2R)-2-Methyl-butanoic Acid Ethyl Ester Impurity CS-T-81304 40917-00-8 Enquire
(2R)-2-Methyl-butanoic Acid Methyl Ester Impurity CS-T-82569 55449-44-0 Enquire
(2S)-2-(2,5-dioxo-3-propylpyrrolidin-1-yl)butanoic acid Impurity CS-SN-00136 Not Available Enquire
(2S)-2,3-Dimethyl-2-piperazin-1-ylbutanoic acid dihydrochlor... Impurity CS-M-25683 1192887-66-3 Enquire
(2S)-2-amino-4-oxo-4-phenylbutanoic acid hydrochloride Impurity CS-P-00818 168154-76-5 Enquire
(2S)-2-Amino-benzenebutanoic Acid Benzyl Ester Tosylate Salt Impurity CS-T-47614 117560-24-4 Enquire
(2S)-2-Amino-benzenebutanoic Acid Methyl Ester Hydrochloride Impurity CS-T-47613 60425-49-2 Enquire
(2S)-2-Hydroxy-2-methyl-3-oxobutanoic Acid Phenylmethyl Este... Impurity CS-T-78826 442159-35-5 Enquire
(2S)-2-Methyl-butanoic Acid Ethyl Ester Impurity CS-T-80441 10307-61-6 Enquire
(2S)-2-Methyl-butanoic Acid Methyl Ester Impurity CS-T-81796 10307-60-5 Enquire
(2S)-4-bromo-2-[[(1,1-dimethylethoxy)carbonyl]amino]-Butanoi... Impurity CS-DV-00126 76969-87-4 Enquire
(2S)-Amino-3-(4-Chlorophenyl)-3-Methylbutanoic Acid Impurity CS-P-07260 853687-23-7 Enquire
(2S)-Amino-4-Chloro-3,3-Dimethylbutanoic Acid Impurity CS-P-07259 1182213-77-9 Enquire
(2S)-N-Boc-2-amino-4-azido-butanoic Acid Methyl Ester Impurity CS-T-07370 359781-97-8 Enquire
(3R)-3-Amino-4-hydroxybutanoic acid Impurity CS-DV-00166 16504-56-6 Enquire
(3R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-3-hydroxy-but... Impurity CS-T-53555 188635-30-5 Enquire
(3S)-3-(2-thienylthio)butanoic acid Impurity CS-O-10614 133359-80-5 Enquire
(R)-3-(((benzyloxy)carbonyl)amino)-4-(2,4,5-trifluorophenyl)... Impurity CS-O-38134 1246960-25-7 Enquire
(R)-3-((tert-Butoxycarbonyl)amino)-4-(3,4-dichlorophenyl)but... Impurity CS-M-29965 269396-56-7 Enquire
(R,E)-4-((1-([1,1'-biphenyl]-4-yl)-5-ethoxy-4-methyl-5-oxope... Impurity CS-O-39571 Not Available Enquire
(R,S)-3-[(Tert-butyldimethylsilyl)oxy]-2-methyl-butanoic Aci... Impurity CS-T-61659 155897-72-6 Enquire
(S)-2-amino-4-morpholinobutanoic acid Impurity CS-O-14807 1689522-41-5 Enquire
(S)-2-Di(tert-butyloxycarbonyl)amino-4-iodo-butanoic Acid te... Impurity CS-T-88624 1798902-92-7 Enquire
(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(4-(trif... Impurity CS-M-29493 270065-81-1 Enquire
(S)-3-Amino-4-(3-chlorophenyl)butanoic acid, HCl Impurity CS-AC-01921 270596-38-8 Enquire
(S)-3-Amino-4-(4-chlorophenyl)butanoic acid, HCl Impurity CS-AC-03644 270596-41-3 Enquire
(S)-3-Amino-4-(4-fluorophenyl)butanoic acid, HCl Impurity CS-AC-04058 270596-53-7 Enquire
(S)-3-methyl-2-(3-methylbutanamido)butanoic acid Impurity CS-O-39231 39741-06-5 Enquire
(S)-3-methyl-2-propionamidobutanoic acid Impurity CS-O-39232 20051-64-3 Enquire
(S)-4-Amino-3-phenylbutanoic acid hydrochloride Impurity CS-AC-02393 52950-37-5 Enquire
(Z)-2-(Methoxyimino)-3-oxobutanoic Acid Methyl Ester Impurity CS-T-32410 80350-55-6 Enquire
(Z)-4-Chloro-2-(methoxyimino)-3-oxobutanoic acid Impurity CS-O-31745 111230-59-2 Enquire
(αR)-2,3-Dihydro-4-methoxy-α-(methylamino)-7-nitro-γ-oxo-1H-... Impurity CS-T-89569 1227675-52-6 Enquire
(αR)-Hydroxy-benzenebutanoic Acid Impurity CS-T-78907 29678-81-7 Enquire
(αS)-α-[[(1S)-1-Carboxyethyl]amino]benzenebutanoic Acid Impurity CS-T-92556 84023-58-5 Enquire
2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-methylbutanoic ... Impurity CS-M-28659 5115-65-1 Enquire
2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-butanoic acid Impurity CS-M-26265 35340-62-6 Enquire
2-(2,5-dioxo-3-propylpyrrolidin-1-yl)butanoic acid Impurity CS-O-42022 Not Available Enquire
2-(3-Oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)-butanoic acid Impurity CS-M-26762 899710-23-7 Enquire
2-(4-Fluorophenyl)-5,5-dimethyl-1,3-dioxane-2-butanoic Acid Impurity CS-T-75917 953805-21-5 Enquire
2(R,S)-Hydroxy-4[[(2R)-2-hydroxy-2-(3-hydroxyphenyl)ethyl]me... Impurity CS-T-27511 1217525-08-0 Enquire
2(S)-Amino-4-azido-butanoic Acid Impurity CS-T-01898 120042-14-0 Enquire
2,3,4,4-Tetrachloro-3-(dichloromethyl)butanoic Acid Methyl E... Impurity CS-T-61747 97055-35-1 Enquire
2-[(3-Nitrophenyl)methylene]-3-oxo-butanoic Acid Propyl Este... Impurity CS-T-82946 77888-04-1 Enquire
2-{[(1-Acetyl-2,3-dihydro-1H-indol-5-yl)sulfonyl]-amino}-3-m... Impurity CS-M-26175 108583-92-2 Enquire
2-bromo-4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)butanoic a... Impurity CS-Q-00156 35197-64-9 Enquire
2-Hydroxy-4-methylthiobutanoic acid Impurity CS-DV-01736 583-91-5 Enquire
2S-[(1-Carboxyethyl)amino]-benzenebutanoic Acid Methyl Benzy... Impurity CS-T-70194 1356011-64-7 Enquire
2S-[(1-Carboxyethyl)amino]-benzenebutanoic Acid Methyl Ester Impurity CS-BI-00011 Not Available Enquire
3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)-4-(meth... Impurity CS-O-34269 2088032-56-6 Enquire
3-Hydroxy-4-oxobutanoic Acid Phenylephrine Impurity CS-T-56068 830346-80-0 Enquire
3-Hydroxybutanoic acid calcium salt Impurity CS-O-41214 586976-56-9 Enquire
4-((3R,5R)-5-([1,1'-biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrr... Impurity CS-O-36496 Not Available Enquire
4-((3R,5S)-5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrr... Impurity CS-TA-30797 2216746-87-9 Enquire
4-((4-Hydroxybutanoyl)oxy) Butanoic Acid Sodium Salt Impurity CS-P-08939 Not Available Enquire
4-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl) butanoic acid Impurity CS-M-25463 3130-75-4 Enquire
4-(2,3-Dimethoxyphenyl)butanoic Acid Impurity CS-T-53389 64400-76-6 Enquire
4-(2-Oxo-2,3-dihydro-1H-indol-3-yl)butanoic acid Impurity CS-M-25885 2971-18-8 Enquire
4-(3,4-Dichlorophenyl)-4-phenylbutanoic Acid Impurity CS-T-52694 79560-18-2 Enquire
4-(3,4-Dihydropyrido[4,3-b]-1,6-naphthyridin-2(1H)-yl)-4-oxo... Impurity CS-M-05042 392233-82-8 Enquire
4-(3,4-Dimethoxyphenyl)butanoic Acid Impurity CS-T-53390 13575-74-1 Enquire
4-(3-Carboxypropoxy)-4-Oxobutanoic Acid Impurity CS-P-08940 16956-81-3 Enquire
4-(4-Acetyl-2-methoxy-5-nitrophenoxy)-butanoic Acid Ethyl Es... Impurity CS-T-47314 1031702-80-3 Enquire
4-(4-Formyl-3-methoxyphenoxy)butanoic Acid Impurity CS-T-24730 309964-23-6 Enquire
4-(5-{[(3-Fluorophenyl)amino]carbonyl}-1,3,4-thiadiazol-2-yl... Impurity CS-M-28797 1142202-89-8 Enquire
4-(5-{[(5-Phenyl-1,3,4-thiadiazol-2-yl)amino]-carbonyl}-1,3,... Impurity CS-M-28812 1142209-59-3 Enquire
4-(5-Chloro-2-((4-fluorobenzyl)thio)pyrimidine-4-carboxamido... Impurity CS-T-50734 1225162-49-1 Enquire
4,4-dichlorobutanoic acid Impurity CS-O-40385 151675-58-0 Enquire
4-[(1-Acetyl-2,3-dihydro-1H-indol-7-yl)amino]-4-oxobutanoic ... Impurity CS-M-05047 394654-07-0 Enquire
4-[(2,4-Dihydroxy-3,3-dimethylbutanoyl)amino]-butanoic acid Impurity CS-M-44131 18679-90-8 Enquire
4-[(4-Bromophenyl)amino]-4-oxobutanoic acid Impurity CS-M-26226 25589-41-7 Enquire
4-[[2-[2-[(6-Chlorohexyl)oxy]ethoxy]ethyl]amino]-4-oxo-butan... Impurity CS-T-72552 1488363-39-8 Enquire
4-[3-(2-Chlorophenyl)-1,2,4-oxadiazol-5-yl]-butanoic acid Impurity CS-M-48039 827014-22-2 Enquire
4-[4-(1-Hydroxyethyl)-2-methoxy-5-nitrophenoxy]butanoic Acid Impurity CS-T-55797 175281-76-2 Enquire
4-[5-(Anilinocarbonyl)-1,3,4-thiadiazol-2-yl]-butanoic acid Impurity CS-M-28792 1142202-80-9 Enquire
4-[Benzyl(methyl)amino]-4-oxobutanoic acid Impurity CS-M-26021 69049-90-7 Enquire
4-{[(Benzyloxy)carbonyl]amino}-3-(4-chlorophenyl)-butanoic a... Impurity CS-M-48332 78131-31-4 Enquire
4-{[(Benzyloxy)carbonyl]amino}butanoic acid Impurity CS-M-47041 5105-78-2 Enquire
4-{[2-Fluoro-5-(methylsulfonyl)phenyl]amino}-4-oxobutanoic a... Impurity CS-M-05037 389609-83-0 Enquire
4-Azido-L-homoalanine, (S)-2-Amino-4-azidobutanoic acid hydr... Impurity CS-EL-05805 942518-29-8 Enquire
4-ethoxy-2-(2-ethoxy-2-oxoethyl)-2-hydroxy-4-oxobutanoic aci... Impurity CS-O-43032 101996-63-8 Enquire
4-Oxo-4-[(2-oxo-1,2-diphenylethyl)amino]-butanoic Acid Impurity CS-T-84016 55217-13-5 Enquire
4-Oxobutanoic acid methyl ester Impurity CS-DV-02899 13865-19-5 Enquire
5-[(2-Chloroethyl)(2-hydroxyethyl)amino]-1-methyl-1H-benzimi... Impurity CS-T-50856 898224-95-8 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(2R)-2-Oxiranylmethyl Ester Butanoic Acid Intermediate CS-T-59995 60456-26-0 In Stock
(S)-2-amino-4-methoxybutanoic acid Intermediate CS-ED-41819 3311-01-1 Enquire
2-amino-4-(pyridin-3-yl)butanoic acid Intermediate CS-O-49844 99461-41-3 Enquire
2-oxo-4-(pyridin-3-yl)butanoic acid Intermediate CS-O-49835 780750-43-8 Enquire
4-(2-Bromophenoxy)butanoic acid Intermediate CS-O-49623 132902-25-1 Enquire
4-Ethoxy-4-oxobutanoic acid Intermediate CS-M-13873 1070-34-4 In Stock
2-Bromo-3,3-dimethylbutanoic acid Intermediate CS-O-47695 50364-40-4 Enquire
3-hydroxy-3-(6-methylpyridin-3-yl)-2,4-bis(4-(methylsulfonyl... Intermediate CS-O-49137 Not Available Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(2S)-2-Azido-3-methylbutanoic acid Fine Chemicals CS-O-52901 40224-47-3 Enquire
(S)-2-(4-(difluoromethoxy)phenyl)-3-methylbutanoic acid Fine Chemicals CS-O-56388 75391-60-5 Enquire
(Z)-4-amino-3-((5-aminohept-6-enoyl)imino)butanoic acid Fine Chemicals CS-O-54383 ---- Enquire
2-Oxo-4-phenylbutanoic acid Fine Chemicals CS-M-46623 710-11-2 In Stock
3-Hydroxy-2-methylbutanoic Acid Fine Chemicals CS-T-27578 473-86-9 In Stock
4-Aminobutanoic acid Fine Chemicals CS-E-05265 56-12-2 In Stock
4-Hydroxybutanoic acid lactone Fine Chemicals CS-O-13298 96-48-0 In Stock
Butanoic acid Fine Chemicals CS-T-09684 107-92-6 In Stock
Perfluoro-4-isopropoxybutanoic acid Fine Chemicals CS-ED-41961 801212-59-9 Enquire
Perfluoro-4-methoxybutanoic acid Fine Chemicals CS-O-49815 863090-89-5 Enquire
(2R,3S)-2,3,4-Trihydroxybutanoic acid Fine Chemicals CS-O-34714 3909-12-4 Enquire
(2S,3S)-2-Amino-3-(sulfoamino)butanoic Acid Fine Chemicals CS-O-38648 2195336-17-3 Enquire
(3R)-4-(benzyloxy)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}am... Fine Chemicals CS-ZB-20816 1233495-08-3 Enquire
(S)-2-((2(1H-tetrazol-5-yl)biphenyl-4-yl)methylamino)-3-meth... Fine Chemicals CS-O-37551 Not Available Enquire
2-​Amino-​4-​(2-​aminophenyl)​-​4-​oxobutanoic acid Fine Chemicals CS-T-94219 343-65-7 Enquire
2-(3-Bromophenyl)-3-hydroxy-3-methylbutanoic acid Fine Chemicals CS-O-38177 1911568-51-8 Enquire
2,3,3-trimethylbutanoic acid Fine Chemicals CS-TA-56643 19910-29-3 Enquire
2,4-dichlorobutanoic acid Fine Chemicals CS-O-34112 18017-35-1 Enquire
2-HYDROXY-2-PHENYLBUTANOIC ACID Fine Chemicals CS-ZB-00524 35468-69-0 Enquire
3-(2-oxopyrrolidin-1-yl)butanoic acid Fine Chemicals CS-ZB-23741 100911-30-6 Enquire
3-(4-Isobutyrylphenyl)butanoic acid Fine Chemicals CS-O-34757 Not Available Enquire
3,4 dihydroxy butanoic acid Fine Chemicals CS-O-37101 1518-61-2 Enquire
3-oxo-4-(2,4,5-trifluorophenyl)butanoic acid Fine Chemicals CS-O-37598 1256815-03-8 Enquire
4-((3R,5R,7R)-adamantan-1-yl)-2-methylbutanoic acid Fine Chemicals CS-O-33847 1603845-48-2 Enquire
4-((5-(hydroxymethyl)-6-methylpyridin-3-yl)methoxy)-4-oxobut... Fine Chemicals CS-O-36728 Not Available Enquire
4-(1-Methylcyclopropyl)butanoic acid Fine Chemicals CS-ZG-53515 39223-32-0 Enquire
4-(Methylamino)butanoic acid hydrochloride Fine Chemicals CS-MM-70203 6976-17-6 Enquire
4-(piperidin-4-yl)butanoic acid Fine Chemicals CS-ED-02235 90950-44-0 Enquire
4-bromo-3-oxobutanoic acid Fine Chemicals CS-O-36773 27807-85-8 Enquire
4-Chloro-2-((2-methoxy-2-oxoethoxy)-imino)-3-oxobutanoic aci... Fine Chemicals CS-MM-09814 84080-70-6 Enquire
4-Chloro-3-oxobutanoic acid Fine Chemicals CS-MM-47592 27807-84-7 Enquire
4-Chlorobutanoic acid Fine Chemicals CS-MM-12487 627-00-9 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-(N-nitroso,N-methylamino)-2-phenyl-n-butanoic acid methyl ... Nitrosamine CS-O-44387 Not Available Enquire
4-(2-(methyl(nitroso)amino)ethoxy)-4-oxobutanoic acid Nitrosamine CS-O-53873 ---- Enquire
N-Nitroso Ribociclib N-oxobutanoic acid Nitrosamine CS-O-55155 ---- Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,2-Dimethylbutanoic Acid-d6 Stable Isotope Reagent CS-T-93615 101419-75-4 In Stock
4-Phenylbutanoic acid-d5 Stable Isotope Reagent CS-O-03253 64138-52-9 In Stock
Perfluoro-n-[13C4]butanoic acid Stable Isotope Reagent CS-O-45174 1017281-29-6 Enquire
(2S,3R)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-4-phenylbut... Stable Isotope Reagent CS-ED-02226 62023-65-8 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(S)-2-Amino-2-phenylbutanoic acid Building Blocks CS-O-57671 52247-77-5 Enquire
(S)-3-Methyl-2-phenylbutanoic acid Building Blocks CS-O-48382 13490-69-2 Enquire
4-((4-hydroxybutanoyl)oxy)butanoic acid, sodium salt Building Blocks CS-O-47905 Not Available Enquire
4-(4-hydroxybutanoyloxy) butanoic acid Building Blocks CS-O-48063 Not Available Enquire
(R)-2,3-dihydroxy-3-methylbutanoic acid Building Blocks CS-O-45173 19451-56-0 Enquire
(R)-N-Fmoc-3-amino-4-(phenylthio)butanoic acid Building Blocks CS-T-77572 1244724-97-7 Enquire
(S)-3-(Fmoc-amino)-4-(3-methyl-phenyl)butanoic acid Building Blocks CS-M-30081 270062-94-7 Enquire
2,3-dihydroxy-2-methylbutanoic acid Building Blocks CS-TB-24901 14868-24-7 Enquire
2,4-bis(methylthio)-butanoic acid Building Blocks CS-O-35486 99115-99-8 Enquire
2,4-Diaminobutanoic Acid Building Blocks CS-TB-17137 305-62-4 Enquire
2,4-Dihydroxybutanoic Acid Lithium Salt Building Blocks CS-TB-25364 170033-68-8 Enquire
3,4-dihydroxy-3-methylbutanoic acid Building Blocks CS-BX-01393 858814-97-8 Enquire
4,4,4-Trifluoro-3-hydroxybutanoic Acid Building Blocks CS-DJ-00809 86884-21-1 Enquire
4-[(2-tert-Butylphenyl)amino]-4-oxobutanoic acid Building Blocks CS-M-45408 904807-77-8 Enquire
4-amino-2-ethylbutanoic acid hydrochloride Building Blocks CS-ZB-32035 1864061-13-1 Enquire
Fmoc-(2R,3S)-2-amino-3-(phenylthio)-butanoic acid Building Blocks CS-M-29941 1217741-23-5 Enquire
Fmoc-(2S,3S)-2-amino-3-ethoxybutanoic acid Building Blocks CS-M-29869 1279034-29-5 Enquire
Fmoc-(2S,3S)-2-amino-3-methoxybutanoic acid Building Blocks CS-M-29870 1279029-70-7 Enquire
FMOC-(R)-2-AMINO-3-HYDROXY-3-METHYLBUTANOIC ACID Building Blocks CS-M-29873 884880-39-1 Enquire
Fmoc-(RS)-2-amino-3-hydroxy-3-methylbutanoic acid Building Blocks CS-M-29874 1246172-30-4 Enquire
Fmoc-4-(4-aminophenyl)butanoic acid Building Blocks CS-M-29952 186320-14-9 Enquire
Fmoc-4-amino-3-hydroxybutanoic acid Building Blocks CS-M-29881 184763-08-4 Enquire