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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
"2-(2-Nitrobenzylidene)-3-oxobutanoic Acid, 2-Acetoxy-2-meth... Stable Isotopes CS-T-83168 1185235-10-2 Enquire
(+/-)-2-Acetylaminobutanoic Acid-d3 Stable Isotopes CS-T-64343 1219397-36-0 Enquire
(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 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
(aR,ßR)-ß-(2,4-Difluorophenyl)-ß-hydroxy-a-methyl-1H-1,2,4-t... Stable Isotopes CS-T-89880 1329610-75-4 Enquire
(E)-2-[(2-Chlorophenyl)methylene]-4-[2-(1,3-dihydro-1,3-diox... Stable Isotopes CS-T-101679 Not Available Enquire
(S)-2-Di(tert-butyloxycarbonyl)amino-4-cyano-13C-butanoic Ac... Stable Isotopes CS-T-96977 Not Available Enquire
(Z)-2-(Methoxyimino)-3-oxobutanoic Acid-d3 Methyl Ester Stable Isotopes CS-T-80999 1331636-65-7 Enquire
(Z)-2-[(2-Chlorophenyl)methylene]-4-[2-(1,3-dihydro-1,3-diox... Stable Isotopes CS-T-101680 Not Available 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-(Acetylamino)butanoic Acid-d5 Stable Isotopes CS-T-100929 Not Available Enquire
2,2-Dimethylbutanoic Acid-d6 Stable Isotopes CS-T-93615 101419-75-4 In Stock
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-​(Dimethyloxidoamino)​butanoic Acid-d6 Hydrochloride Stable Isotopes CS-T-96719 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-Anilino-4-oxobutanoic Acid-d5 Stable Isotopes CS-T-48266 840529-98-8 Enquire
4-hydroxybutanoic acid - D6 Stable Isotopes CS-O-39273 362044-72-2 Enquire
4-Phenylbutanoic acid d5 Stable Isotopes CS-O-03253 64138-52-9 In Stock
DL-2-Hydroxy-4-(methylthio)butanoic Acid-13C4 Stable Isotopes CS-T-78930 1215556-82-3 Enquire
JWH 073 N-butanoic acid-D7 Stable Isotopes CS-T-102704 1307803-52-6(Unlabelled) Enquire
JWH-073 (Indole-d5) Butanoic Acid Stable Isotopes CS-T-56951 1320363-50-5 Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-(4-Chlorophenyl)-2-(4-methylphenyl)-4-oxobutanoic acid API Standards CS-M-32550 70596-90-6 Enquire
4-(Naphthalen-1-yl)-4-oxobutanoic Acid API Standards CS-T-38313 4653-13-8 Enquire
4-[(4-Methoxybenzyl)amino]-4-oxobutanoic acid API Standards CS-M-15789 724736-17-8 Enquire
Boc-4-amino-3-hydroxybutanoic acid API Standards CS-M-29865 69489-07-2 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Amino-3-Hydroxybutanoic Acid Metabolites CS-T-02742 924-49-2 In Stock
4-Hydroxybutanoic acid sodium Metabolites CS-EK-00422 502-85-2 Enquire
JWH073-butanoic acid metabolite Metabolites CS-EK-01830 1307803-52-6 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(2S)-2,3-Dimethyl-2-piperazin-1-ylbutanoic acid dihydrochlo... Impurities CS-M-25683 1192887-66-3 Enquire
"(2S)-4-bromo-2-[[(1,1-dimethylethoxy)carbonyl]amino]-Butano... Impurities CS-DV-00126 76969-87-4 Enquire
"(2S)-Amino-4-Chloro-3,3-Dimethylbutanoic Acid" Impurities CS-P-07259 1182213-77-9 Enquire
"(3R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-3-hydroxy-bu... Impurities CS-T-53555 188635-30-5 Enquire
"(S)-3-Amino-4-(3-chlorophenyl)butanoic acid, HCl" Impurities CS-AC-01921 270596-38-8 Enquire
"(S)-3-Amino-4-(4-chlorophenyl)butanoic acid, HCl" Impurities CS-AC-03644 270596-41-3 Enquire
"2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-butanoic acid" Impurities CS-M-26265 35340-62-6 Enquire
"2-(3-Oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)-butanoic acid" Impurities CS-M-26762 899710-23-7 Enquire
"2(R,S)-Hydroxy-4[[(2R)-2-hydroxy-2-(3-hydroxyphenyl)ethyl]m... Impurities CS-T-27511 1217525-08-0 Enquire
"2-{[(1-Acetyl-2,3-dihydro-1H-indol-5-yl)sulfonyl]-amino}-3-... Impurities CS-M-26175 108583-92-2 Enquire
"2-bromo-4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)butanoic ... Impurities CS-Q-00156 35197-64-9 Enquire
"4-(2,3-Dimethoxyphenyl)butanoic Acid" Impurities CS-T-53389 64400-76-6 Enquire
"4-(2-Oxo-2,3-dihydro-1H-indol-3-yl)butanoic acid" Impurities CS-M-25885 2971-18-8 Enquire
"4-(3,4-Dichlorophenyl)-4-phenylbutanoic Acid" Impurities CS-T-52694 79560-18-2 Enquire
"4-(3,4-Dihydropyrido[4,3-b]-1,6-naphthyridin-2(1H)-yl)-4-ox... Impurities CS-M-05042 392233-82-8 Enquire
"4-(3,4-Dimethoxyphenyl)butanoic Acid" Impurities CS-T-53390 13575-74-1 Enquire
"4-(5-{[(5-Phenyl-1,3,4-thiadiazol-2-yl)amino]-carbonyl}-1,3... Impurities CS-M-28812 1142209-59-3 Enquire
"4-[(1-Acetyl-2,3-dihydro-1H-indol-7-yl)amino]-4-oxobutanoic... Impurities CS-M-05047 394654-07-0 Enquire
"4-[3-(2-Chlorophenyl)-1,2,4-oxadiazol-5-yl]-butanoic acid" Impurities CS-M-48039 827014-22-2 Enquire
"4-Azido-L-homoalanine, (S)-2-Amino-4-azidobutanoic acid hyd... Impurities CS-EL-05805 942518-29-8 Enquire
(+/-)-2-Acetylaminobutanoic Acid Impurities CS-T-47086 114285-09-5 Enquire
(2R)-2-bromo-Butanoic acid methyl ester Impurities CS-DV-00112 114438-75-4 Enquire
(2R)-2-Methyl-butanoic Acid Ethyl Ester Impurities CS-T-81304 40917-00-8 Enquire
(2R)-2-Methyl-butanoic Acid Methyl Ester Impurities CS-T-82569 55449-44-0 Enquire
(2S)-2-amino-4-oxo-4-phenylbutanoic acid hydrochloride Impurities CS-P-00818 168154-76-5 Enquire
(2S)-2-Amino-benzenebutanoic Acid Benzyl Ester Tosylate Salt Impurities CS-T-47614 117560-24-4 Enquire
(2S)-2-Amino-benzenebutanoic Acid Methyl Ester Hydrochloride Impurities CS-T-47613 60425-49-2 Enquire
(2S)-2-Hydroxy-2-methyl-3-oxobutanoic Acid Phenylmethyl Este... Impurities CS-T-78826 442159-35-5 Enquire
(2S)-2-Methyl-butanoic Acid Ethyl Ester Impurities CS-T-80441 10307-61-6 Enquire
(2S)-2-Methyl-butanoic Acid Methyl Ester Impurities CS-T-81796 10307-60-5 Enquire
(2S)-Amino-3-(4-Chlorophenyl)-3-Methylbutanoic Acid Impurities CS-P-07260 853687-23-7 Enquire
(2S)-N-Boc-2-amino-4-azido-butanoic Acid Methyl Ester Impurities CS-T-07370 359781-97-8 Enquire
(3R)-3-Amino-4-hydroxybutanoic acid Impurities CS-DV-00166 16504-56-6 Enquire
(3S)-3-(2-thienylthio)butanoic acid Impurities CS-O-10614 133359-80-5 Enquire
(3S)-3-amino-4-(2,4,5-trifluorophenyl)butanoic acid Impurities CS-O-43279 1217854-08-4 Enquire
(R)-3-(((benzyloxy)carbonyl)amino)-4-(2,4,5-trifluorophenyl)... Impurities CS-O-38134 1246960-25-7 Enquire
(R)-3-((tert-Butoxycarbonyl)amino)-4-(3,4-dichlorophenyl)but... Impurities CS-M-29965 269396-56-7 Enquire
(R,S)-3-[(Tert-butyldimethylsilyl)oxy]-2-methyl-butanoic Aci... Impurities CS-T-61659 155897-72-6 Enquire
(S)-2-amino-4-morpholinobutanoic acid Impurities CS-O-14807 1689522-41-5 Enquire
(S)-2-Di(tert-butyloxycarbonyl)amino-4-iodo-butanoic Acid te... Impurities CS-T-88624 1798902-92-7 Enquire
(S)-3-Amino-4-(4-fluorophenyl)butanoic acid, HCl Impurities CS-AC-04058 270596-53-7 Enquire
(S)-3-methyl-2-(3-methylbutanamido)butanoic acid Impurities CS-O-39231 39741-06-5 Enquire
(S)-3-methyl-2-propionamidobutanoic acid Impurities CS-O-39232 20051-64-3 Enquire
(S)-4-Amino-3-phenylbutanoic acid hydrochloride Impurities CS-AC-02393 52950-37-5 Enquire
(Z)-2-(Methoxyimino)-3-oxobutanoic Acid Methyl Ester Impurities CS-T-32410 80350-55-6 Enquire
(Z)-4-Chloro-2-(methoxyimino)-3-oxobutanoic acid Impurities CS-O-31745 111230-59-2 Enquire
(αR)-2,3-Dihydro-4-methoxy-α-(methylamino)-7-nitro-γ-oxo-1H-... Impurities CS-T-89569 1227675-52-6 Enquire
(αR)-Hydroxy-benzenebutanoic Acid Impurities CS-T-78907 29678-81-7 Enquire
(αS)-α-[[(1S)-1-Carboxyethyl]amino]benzenebutanoic Acid Impurities CS-T-92556 84023-58-5 Enquire
[R-(R*,S*)]-α-[(1-Carboxyethyl)amino]-γ-oxo-benzenebutanoic ... Impurities CS-T-71142 105167-27-9 In Stock
2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-methylbutanoic ... Impurities CS-M-28659 5115-65-1 Enquire
2-(4-Fluorophenyl)-5,5-dimethyl-1,3-dioxane-2-butanoic Acid Impurities CS-T-75917 953805-21-5 Enquire
2-(N-nitroso,N-methylamino)-2-phenyl-n-butanoic acid methyl ... Impurities CS-O-44387 Not Available Enquire
2(S)-Amino-4-azido-butanoic Acid Impurities CS-T-01898 120042-14-0 Enquire
2,2’-(Ethanediyldiimino)bis-butanoic Acid(Mixture of Diaster... Impurities CS-T-22227 498-17-9 In Stock
2,3,4,4-Tetrachloro-3-(dichloromethyl)butanoic Acid Methyl E... Impurities CS-T-61747 97055-35-1 Enquire
2-[(3-Nitrophenyl)methylene]-3-oxo-butanoic Acid Propyl Este... Impurities CS-T-82946 77888-04-1 Enquire
2-amino-2-phenylbutanoic acid Impurities CS-O-44768 5438-07-3 Enquire
2-amino-3-(3-methyl-3H-diazirin-3-yl)butanoic acid Impurities CS-O-55197 851961-06-3 Enquire
2-Hydroxy-4-methylthiobutanoic acid Impurities CS-DV-01736 583-91-5 Enquire
2S-[(1-Carboxyethyl)amino]-benzenebutanoic Acid Methyl Benzy... Impurities CS-T-70194 1356011-64-7 Enquire
3-​amino-​4-​(2,​4,​5-​trifluorophenyl)​butanoic acid hydroc... Impurities CS-N-05271 1909337-07-0 Enquire
3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)-4-(meth... Impurities CS-O-34269 2088032-56-6 Enquire
3-Hydroxy-4-oxobutanoic Acid Phenylephrine Impurities CS-T-56068 830346-80-0 Enquire
3-Hydroxybutanoic acid calcium salt Impurities CS-O-41214 586976-56-9 Enquire
4-(((2S,4R)-1-([1,1'-Biphenyl]-4-yl)-5-isopropoxy-4-methyl-5... Impurities CS-O-40504 2514965-95-6 In Stock
4-((3R,5R)-5-([1,1'-biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrr... Impurities CS-O-36496 Not Available Enquire
4-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl) butanoic acid Impurities CS-M-25463 3130-75-4 Enquire
4-(4-Acetyl-2-methoxy-5-nitrophenoxy)-butanoic Acid Ethyl Es... Impurities CS-T-47314 1031702-80-3 Enquire
4-(4-Formyl-3-methoxyphenoxy)butanoic Acid Impurities CS-T-24730 309964-23-6 Enquire
4-(4-Nitrophenyl)Butanoic Acid Impurities CS-M-47419 5600-62-4 In Stock
4-(5-{[(3-Fluorophenyl)amino]carbonyl}-1,3,4-thiadiazol-2-yl... Impurities CS-M-28797 1142202-89-8 Enquire
4-(5-Chloro-2-((4-fluorobenzyl)thio)pyrimidine-4-carboxamido... Impurities CS-T-50734 1225162-49-1 Enquire
4-(Dimethylamino)Butanoic Acid Hydrochloride Impurities CS-M-25948 69954-66-1 In Stock
4,4-dichlorobutanoic acid Impurities CS-O-40385 151675-58-0 Enquire
4-[[2-[2-[(6-Chlorohexyl)oxy]ethoxy]ethyl]amino]-4-oxo-butan... Impurities CS-T-72552 1488363-39-8 Enquire
4-[4-(1-Hydroxyethyl)-2-methoxy-5-nitrophenoxy]butanoic Acid Impurities CS-T-55797 175281-76-2 Enquire
4-[5-(Anilinocarbonyl)-1,3,4-thiadiazol-2-yl]-butanoic acid Impurities CS-M-28792 1142202-80-9 Enquire
4-{[(Benzyloxy)carbonyl]amino}butanoic acid Impurities CS-M-47041 5105-78-2 Enquire
4-{[2-Fluoro-5-(methylsulfonyl)phenyl]amino}-4-oxobutanoic a... Impurities CS-M-05037 389609-83-0 Enquire
4-ethoxy-2-(2-ethoxy-2-oxoethyl)-2-hydroxy-4-oxobutanoic aci... Impurities CS-O-43032 101996-63-8 Enquire
4-Oxo-4-[(2-oxo-1,2-diphenylethyl)amino]-butanoic Acid Impurities CS-T-84016 55217-13-5 Enquire
4-Oxobutanoic acid methyl ester Impurities CS-DV-02899 13865-19-5 Enquire
5-[(2-Chloroethyl)(2-hydroxyethyl)amino]-1-methyl-1H-benzimi... Impurities CS-T-50856 898224-95-8 Enquire
O-De-4-oxobutanoic Acid N-Demethly-N-4-oxobutanoic Acid Sarp... Impurities CS-O-13415 Not Available Enquire
Palbociclib oxobutanoic acid Impurity Impurities CS-O-35203 1974279-21-4 In Stock
Perfluoro-n-[13C4]butanoic acid Impurities CS-O-45174 1017281-29-6 Enquire
rac 4-Hydroxy-4-(3-pyridyl)butanoic Acid Dicyclohexylamine S... Impurities CS-T-56426 1216491-66-5 Enquire
Ribociclib N-oxobutanoic acid Impurities CS-O-51246 Not Available In Stock
Tolvaptan γ-Hydroxybutanoic Acid Impurity Impurities CS-T-86653 1346599-75-4 Enquire
Tolvaptan γ-oxobutanoic acid impurity Impurities CS-T-86904 1346599-56-1 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(2R)-3-methyl-2-(1-oxo-2,3-dihydro-1H-isoindol-2-yl)butanoi... Intermediates CS-EL-10060 298700-69-3 Enquire
"(2S)-2-{[(benzyloxy)carbonyl]amino}-3,3-dimethylbutanoic ac... Intermediates CS-EL-10034 59269-54-4 Enquire
"(2S)-2-Amino-4-[[(1,1-dimethylethoxy)carbonyl]amino]butanoi... Intermediates CS-T-65816 3350-15-0 Enquire
"(2S,3R)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amin... Intermediates CS-T-23786 117106-20-4 Enquire
"(2S,3S)-2,3-Dihydroxy-butanoic Acid Methyl Ester" Intermediates CS-T-89330 1932552-43-6 Enquire
"(2S,3S)-3-amino-2-hydroxy-4-phenylbutanoic acid" Intermediates CS-EL-10053 62023-62-5 Enquire
"(3S)-3,4-Dihydroxybutanoic Acid Ethyl Ester" Intermediates CS-T-19124 108585-47-3 Enquire
"(R)-2-(Aminomethyl)-3,3-dimethylbutanoic acid" Intermediates CS-DV-00294 367278-49-7 Enquire
"(R)-2,4-Diamino-4-oxobutanoic acid hydrate" Intermediates CS-M-58162 5794-24-1 Enquire
"(R)-3-(Benzyloxyamino)-4-(2,4,5-trifluorophenyl)butanoic ac... Intermediates CS-DV-00310 767352-29-4 Enquire
"(R)-3-Amino-4-(3-fluorophenyl)butanoic acid, HCl" Intermediates CS-T-65695 331763-65-6 Enquire
"(S)-2-(Aminomethyl)-3,3-dimethylbutanoic acid" Intermediates CS-DV-00379 367278-48-6 Enquire
"(S)-3-Amino-4-(2,4,5-trifluorophenyl)butanoic Acid Hydrochl... Intermediates CS-T-64597 1217809-78-3 Enquire
"(S)-3-Amino-4-(3,4-dichlorophenyl)butanoic acid, HCl" Intermediates CS-T-65172 270063-50-8 Enquire
"(S)-3-Amino-4-(4-iodophenyl)butanoic acid, HCl" Intermediates CS-T-66021 270065-70-8 Enquire
"2-(2,4-Dichlorophenoxy)butanoic acid" Intermediates CS-M-17686 6956-86-1 Enquire
"2-(2-Nitrobenzylidene)-3-oxobutanoic Acid, 2-Acetoxy-2-meth... Intermediates CS-T-59364 106685-67-0 Enquire
"2-(4-chlorophenyl)-4-(3,4-dichlorophenyl)-4-oxobutanoic aci... Intermediates CS-EL-07777 73684-83-0 Enquire
"2,3-Dimethylbutanoic Acid" Intermediates CS-T-91121 14287-61-7 Enquire
"2,4-Dioxo-4-(thien-2-yl)butanoic acid" Intermediates CS-CE-00367 105356-57-8 Enquire
"2,4-Dioxo-4-phenylbutanoic acid" Intermediates CS-AC-07955 5817-92-5 Enquire
"2-Acetamido-3,3-dimethylbutanoic Acid" Intermediates CS-T-64092 22146-58-3 Enquire
"2a-Phenyl-1,2(2a)-Homo[5,6]fullerene-C60-Ih-2a-butanoic Aci... Intermediates CS-T-84846 161196-25-4 Enquire
80%)"" rel="follow" style=''> "2R,3S-Dihydroxy-4-oxo-butanoic Acid (>80%)" Intermediates CS-T-91502 1106851-69-7 Enquire
"4-(2,3-Dihydro-1,4-benzodioxin-6-yl)butanoic acid" Intermediates CS-EL-07914 14939-93-6 Enquire
"4-(2,3-dihydro-1H-inden-5-yl)-4-oxobutanoic acid" Intermediates CS-EL-07577 75382-32-0 Enquire
"4-(2,4-difluoroanilino)-4-oxobutanoic acid" Intermediates CS-EL-07154 193952-12-4 Enquire
"4-(2,4-Difluorophenyl)-4-oxobutanoic Acid" Intermediates CS-T-52877 110931-77-6 Enquire
"4-(2,4-Dinitrophenyl)butanoic acid" Intermediates CS-M-35055 52120-49-7 Enquire
"4-(3,4-dichlorophenyl)-2-(4-methylphenyl)-4-oxobutanoic aci... Intermediates CS-EL-17796 344282-29-7 Enquire
"4-(3,4-Dichlorophenyl)-4-oxobutanoic acid" Intermediates CS-EL-07754 50597-19-8 Enquire
"4-(3,5-dichloroanilino)-4-oxobutanoic acid" Intermediates CS-EL-09554 53219-95-7 Enquire
"4-(3-Isopropenyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-1-yl... Intermediates CS-M-31238 52099-78-2 Enquire
"4-(4-Benzyl-1,4-diazepan-1-yl)-4-oxobutanoic acid" Intermediates CS-M-05052 396105-43-4 Enquire
"4-(4-chlorophenyl)-2-(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1... Intermediates CS-EL-04624 138560-56-2 Enquire
"4-(4-Oxo-3,4-dihydroquinazolin-2-yl)butanoic acid" Intermediates CS-M-17187 95494-51-2 Enquire
"4,4,4-Trifluoro-3-(trifluoromethyl)butanoic Acid" Intermediates CS-T-87634 17327-33-2 Enquire
"4,4-Dimethoxybutanoic Acid Methyl Ester" Intermediates CS-T-19631 4220-66-0 Enquire
"4-[(2,1,3-Benzothiadiazol-4-ylsulfonyl)amino]butanoic acid" Intermediates CS-M-06850 405279-58-5 Enquire
"4-[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethoxy]-3-oxob... Intermediates CS-T-91137 111429-90-4 Enquire
"4-Amino-2,2-dimethylbutanoic acid hydrochloride" Intermediates CS-AC-04832 138146-22-2 Enquire
"4-amino-3,3-dimethylbutanoic acid hydrochloride" Intermediates CS-EL-06556 89584-21-4 Enquire
"4-Oxo-4-(5-oxo-1,4-diazepan-1-yl)butanoic acid" Intermediates CS-M-05056 397244-77-8 Enquire
"Boc-(2S,3S)-2-amino-3-ethoxybutanoic acid" Intermediates CS-M-29853 630422-53-6 Enquire
α-Amino-2-(ethoxycarbonyl)-1-azetidinebutanoic Acid Eth... Intermediates CS-T-47817 1028192-80-4 Enquire
(αR)-Acetyloxybenzenebutanoic Acid Intermediates CS-T-47363 117017-04-6 Enquire
(αR)-Acetyloxybenzenebutanoic Acid Methyl Ester Intermediates CS-T-47364 138276-23-0 Enquire
(αR)-Hydroxy-benzenebutanoic Acid tert-Butyl Ester Intermediates CS-T-56296 138333-11-6 Enquire
(2R)-2-(dimethylamino)-3-methylbutanoic acid Intermediates CS-ED-27097 899900-52-8 Enquire
(2R)-2-cyclopropanesulfonamido-3-methylbutanoic acid hydroch... Intermediates CS-ED-04622 1807914-36-8 Enquire
(2R)-2-Hydroxy-4-(methylthio)butanoic Acid Calcium Salt Intermediates CS-T-78924 71597-86-9 Enquire
(2R)-2-Oxiranylmethyl Ester Butanoic Acid Intermediates CS-T-59995 60456-26-0 In Stock
(2R,3S)-2-((tert-butoxycarbonyl)amino)-3-(3-fluoro-4-nitroph... Intermediates CS-O-49990 2467738-84-5 Enquire
(2S)​-2-​[[4-​(4-Chlorophenoxy)​phenoxy]​methyl]​-1-​pyrroli... Intermediates CS-T-72252 929915-58-2 Enquire
(2S)-(1-Tetrahydropyramid-2-one)-3-methylbutanoic acid Intermediates CS-O-31281 192725-50-1 Enquire
(2S)-2-(2-methoxyacetamido)-3-methylbutanoic acid Intermediates CS-ED-11895 257638-51-0 Enquire
(2S)-2-(Acetylamino)-4-(methylsulfinyl)butanoic Acid Intermediates CS-T-64580 108646-71-5 Enquire
(2S)-2-methanesulfonamido-3-methylbutanoic acid Intermediates CS-ED-11896 97482-31-0 Enquire
(2S)-2-Methylbutanoic Acid (1S,3S,7S,8S,8aR)-8-[2-[(2R)-3,6-... Intermediates CS-T-58160 1114834-63-7 Enquire
(2S)-4-(4-ethoxyphenyl)-2-{[(9H-fluoren-9-ylmethoxy)carbonyl... Intermediates CS-EL-10023 1252046-18-6 Enquire
(2S)-4-[[1-(2-hydroxy-4,4-dimethyl-6-oxocyclohexen-1-yl)-3-m... Intermediates CS-ED-13464 1313054-73-7 Enquire
(2S)-4-Methoxy-2-Methyl-4-Oxobutanoic Acid Intermediates CS-O-41557 111266-27-4 Enquire
(2S,3R)-3-amino-2-hydroxy-4-phenylbutanoic acid Intermediates CS-ED-05595 59554-14-2 Enquire
(2S,3R)-3-amino-2-hydroxy-4-phenylbutanoic acid hydrochlorid... Intermediates CS-ED-03046 128223-55-2 Enquire
(2S,3S)-2-Amino-3-methoxybutanoic acid Intermediates CS-ED-34237 104195-80-4 Enquire
(3R)-3-Amino-4,4,4-trifluorobutanoic acid hydrochloride Intermediates CS-ED-09269 1018811-44-3 Enquire
(3S)-3-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-Acetamido-4-methyl... Intermediates CS-ED-40354 339990-02-2 Enquire
(3S)-4-amino-3-methylbutanoic acid hydrochloride Intermediates CS-ED-41288 179806-55-4 Enquire
(aS,2S)-2-Carboxy-a-[[(1,1-dimethylethoxy)carbonyl]amino]-1-... Intermediates CS-T-50309 90599-96-5 Enquire
(Dibenzofuran-2-yl)-2-oxobutanoic Acid Intermediates CS-T-88810 885951-79-1 Enquire
(R)-α-[[(4-Nitrophenyl)sulfonyl]oxy]cyclohexanebutanoic... Intermediates CS-T-59579 112110-45-9 Enquire
(R)-α-Hydroxycyclohexanebutanoic Acid Ethyl Ester Intermediates CS-T-55811 95500-39-3 Enquire
(R)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(((allyl... Intermediates CS-DV-00290 387824-78-4 Enquire
(R)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(tritylt... Intermediates CS-ED-33979 1007840-62-1 Enquire
(R)-2-(((Benzyloxy)carbonyl)amino)butanoic acid Intermediates CS-ED-11784 2900-20-1 Enquire
(R)-2-((tert-Butoxycarbonyl)amino)-2-methylbutanoic acid Intermediates CS-ED-13508 123254-58-0 Enquire
(R)-2-Acetamidobutanoic acid Intermediates CS-ED-40368 34271-27-7 Enquire
(R)-2-Amino-2-Methylbutanoic Acid Intermediates CS-CO-00014 3059-97-0 Enquire
(R)-2-Amino-4-oxo-4-(tritylamino)butanoic acid hydrate Intermediates CS-ED-11671 1998701-21-5 Enquire
(R)-3-((tert-butoxycarbonyl)amino)-4-(perfluorophenyl)butano... Intermediates CS-ED-14005 269398-93-8 Enquire
(R)-3-Amino-4-(2-bromophenyl)butanoic acid hydrochloride Intermediates CS-ED-03724 401915-60-4 Enquire
(R)-3-Amino-4-(3,4-difluorophenyl)butanoic acid hydrochlorid... Intermediates CS-ED-03442 269396-58-9 Enquire
(R)-3-Amino-4-(4-bromophenyl)butanoic acid hydrochloride Intermediates CS-ED-03499 331763-73-6 Enquire
(R)-3-Amino-4-(4-chlorophenyl)butanoic acid hydrochloride Intermediates CS-ED-03992 331763-59-8 Enquire
(R)-3-Amino-4-(naphthalen-2-yl)butanoic acid hydrochloride Intermediates CS-ED-06056 331847-02-0 Enquire
(R)-3-Amino-4,4,4-trifluorobutanoic acid Intermediates CS-ED-12058 151911-19-2 Enquire
(R)-3-aminobutanoic acid methyl ester Intermediates CS-DV-00313 103189-63-5 Enquire
(R)-3-Hydroxybutanoic acid Intermediates CS-DV-00315 625-72-9 Enquire
(R)-3-phenylbutanoic acid Intermediates CS-DV-00316 772-14-5 Enquire
(R)-4-([1,1'-Biphenyl]-4-yl)-3-aminobutanoic acid hydrochlor... Intermediates CS-ED-04935 332062-03-0 Enquire
(R)-4-Amino-3-(naphthalen-1-yl)butanoic acid Intermediates CS-ED-34045 108827-19-6 Enquire
(R)-a-[[(Trifluoromethyl)sulfonyl]oxy]-benzenebutanoic Acid ... Intermediates CS-T-45379 138276-17-2 Enquire
(R)-Aminobenzenebutanoic Acid Hydrochloride Intermediates CS-T-47612 1010129-08-4 Enquire
(RS)-2-Amino-4-(hydroxy(methyl)phosphonoyl)butanoic acid Intermediates CS-AJ-00188 51276-47-2 Enquire
(S)-2-(((((1R,2R)-2-(allyloxy)cyclopentyl)oxy)carbonyl)amino... Intermediates CS-ED-41248 1365970-45-1 Enquire
(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-4-... Intermediates CS-ED-29567 941296-80-6 Enquire
(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(tert-bu... Intermediates CS-ED-29574 1072845-47-6 Enquire
(S)-2-(((9H-Fluoren-9-YL)methoxy)carbonylamino)-4-azidobutan... Intermediates CS-ED-30111 942518-20-9 Enquire
(S)-2-(((Benzyloxy)carbonyl)amino)-4-((diphenyl(p-tolyl)meth... Intermediates CS-ED-11689 144317-18-0 Enquire
(S)-2-((tert-Butoxycarbonyl)amino)-2-methylbutanoic acid Intermediates CS-ED-13510 151171-11-8 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(S)-2-(4-(difluoromethoxy)phenyl)-3-methylbutanoic acid Fine Chemicals CS-O-56388 75391-60-5 Enquire
(S)-3,3-dimethyl-2-(2,2,2-trifluoroacetamido)butanoic acid Fine Chemicals CS-O-39256 666832-71-9 In Stock
2-​Amino-​4-​(2-​aminophenyl)​-​4-​oxobutanoic acid Fine Chemicals CS-T-94219 343-65-7 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
3-oxo-4-(2,4,5-trifluorophenyl)butanoic acid Fine Chemicals CS-O-37598 1256815-03-8 Enquire
4-(piperidin-4-yl)butanoic acid Fine Chemicals CS-ED-02235 90950-44-0 Enquire
4-Aminobutanoic acid Fine Chemicals CS-E-05265 56-12-2 In Stock
4-bromo-3-oxobutanoic acid Fine Chemicals CS-O-36773 27807-85-8 Enquire
4-Chlorobutanoic acid Fine Chemicals CS-MM-12487 627-00-9 Enquire
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


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"Fmoc-(2S,3S)-2-amino-3-methoxybutanoic acid" Building Blocks CS-M-29870 1279029-70-7 Enquire
(R)-N-Fmoc-3-amino-4-(phenylthio)butanoic acid Building Blocks CS-T-77572 1244724-97-7 Enquire
(S)-2-Amino-2-phenylbutanoic acid Building Blocks CS-O-57671 52247-77-5 Enquire
(S)-3-(Fmoc-amino)-4-(3-methyl-phenyl)butanoic acid Building Blocks CS-M-30081 270062-94-7 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
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
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-(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