Skip to content

Product division

Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

(3,4-Dimethoxyphenyl)(2-(2-hydrazineylidenepentan-3-yl)-4,5-dimethoxyphenyl)methanone chemical structure

(3,4-Dimethoxyphenyl)(2-(2-hydrazineylidenepentan-3-yl)-4,5-dimethoxyphenyl)methanone

CAS: 37952-09-3
Formula: C₂₂H₂₈N₂O₅
MW: 400.5 g/mol

VQ-034316

Reference Standard

(3,4-Dimethoxyphenyl)acetic acid chemical structure

(3,4-Dimethoxyphenyl)acetic acid

CAS: 93-40-3
Formula: C₁₀H₁₂O₄
MW: 196.2 g/mol

VQ-037777

Reference Standard

(3,4-Dimethoxyphenyl)acetonitrile chemical structure

(3,4-Dimethoxyphenyl)acetonitrile

CAS: 93-17-4
Formula: C₁₀H₁₁NO₂
MW: 177.2 g/mol

VQ-028678

Reference Standard

(3,4-Dimethoxypyridin-2-yl)methyl acetate chemical structure

(3,4-Dimethoxypyridin-2-yl)methyl acetate

CAS: 102625-99-0
Formula: C₁₀H₁₃NO₄
MW: 211.21 g/mol

VQ-027386

Reference Standard

(3,5-Dichloro-4-methoxyphenyl)methanamine Hydrochloride chemical structure

(3,5-Dichloro-4-methoxyphenyl)methanamine Hydrochloride

CAS: 38057-59-9
Formula: C₈H₁₀Cl₃NO
MW: 242.5 g/mol

VQ-029290

Reference Standard

(33R,35S,91R,92R,5S,E)-5-(tert-Butyl)-14,14-difluoro-4,7-dioxo-2,8,10-trioxa-6-aza-1(2,3)-quinoxalina-3(3,1)-pyrrolidina-9(1,2)-cyclopentanacyclotetradecaphan-12-ene-35-carboxylic Acid chemical structure

(33R,35S,91R,92R,5S,E)-5-(tert-Butyl)-14,14-difluoro-4,7-dioxo-2,8,10-trioxa-6-aza-1(2,3)-quinoxalina-3(3,1)-pyrrolidina-9(1,2)-cyclopentanacyclotetradecaphan-12-ene-35-carboxylic Acid

CAS: 2001608-72-4
Formula: C₂₉H₃₄F₂N₄O₇
MW: 588.6 g/mol

VQ-037519

Reference Standard

(3a,5β)-6-Ethylidene-3-Hydroxy-7-Oxocholan-24-Oic Acid chemical structure

(3a,5β)-6-Ethylidene-3-Hydroxy-7-Oxocholan-24-Oic Acid

CAS: 915038-24-3
Formula: C₂₆H₄₀O₄
MW: 416.6 g/mol

VQ-032221

Reference Standard

(3AR,12bR)-Rel-11-Chloro-2,3,3a,12b-tetrahydro-2-methyl-1H-dibenz[2,3:6,7]oxepino [4,5-c]pyrrol-5-ol 5-(hydrogen sulfate) chemical structure

(3AR,12bR)-Rel-11-Chloro-2,3,3a,12b-tetrahydro-2-methyl-1H-dibenz[2,3:6,7]oxepino [4,5-c]pyrrol-5-ol 5-(hydrogen sulfate)

CAS: 1399103-21-9
Formula: C₁₇H₁₆ClNO₅S
MW: 381.8 g/mol

VQ-021629

Reference Standard

(3AR,4R,5R,6aS)-4-((S,E)-3-Hydroxy-5-phenylpent-1-enyl)hexahydro-2H-cyclopenta[b]furan-2,5-diol chemical structure

(3AR,4R,5R,6aS)-4-((S,E)-3-Hydroxy-5-phenylpent-1-enyl)hexahydro-2H-cyclopenta[b]furan-2,5-diol

CAS: 856240-62-5
Formula: C₁₈H₂₄O₄
MW: 304.4 g/mol

VQ-043661

Reference Standard

(3AR,4R,6aS)-4-Methoxytetrahydrofuro[3,4-b]furan-2(3H)-one chemical structure

(3AR,4R,6aS)-4-Methoxytetrahydrofuro[3,4-b]furan-2(3H)-one

CAS: 1932330-83-0
Formula: C₇H₁₀O₄
MW: 158.15 g/mol

VQ-025205

Reference Standard

(3AR,4R,6R,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol

(3AR,4R,6R,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol

CAS: 151527-83-2
Formula: C₈H₁₅NO₃
MW: 173.21 g/mol

VQ-028379

Reference Standard

(3AR,4R,6S,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol chemical structure

(3AR,4R,6S,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol

CAS: 2715109-35-4
Formula: C₈H₁₅NO₃
MW: 173.21 g/mol

VQ-028380

Reference Standard

(3AR,4R,6S,6aS)-Methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate chemical structure

(3AR,4R,6S,6aS)-Methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate

CAS: 229613-93-8
Formula: C₁₈H₃₀N₂O₅
MW: 354.4 g/mol

VQ-041406

Reference Standard

(3AR,4R,7S,7aS)-2-(((1R,2S)-2-((4-(Benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methyl)hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione chemical structure

(3AR,4R,7S,7aS)-2-(((1R,2S)-2-((4-(Benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methyl)hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione

CAS: 1318074-22-4
Formula: C₂₈H₃₆N₄O₂S
MW: 492.7 g/mol

VQ-031690

Reference Standard

(3AR,4R,7S,7aS)-Hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione chemical structure

(3AR,4R,7S,7aS)-Hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione

CAS: 1807983-67-0
Formula: C₉H₁₁NO₂
MW: 165.19 g/mol

VQ-048990

Reference Standard

(3AR,4S,6aS)-4-Methoxytetrahydrofuro[3,4-b]furan-2(3H)-one chemical structure

(3AR,4S,6aS)-4-Methoxytetrahydrofuro[3,4-b]furan-2(3H)-one

CAS: 1932353-11-1
Formula: C₇H₁₀O₄
MW: 158.15 g/mol

VQ-030073

Reference Standard

(3AR,4S,6R,6aS)-6-(N-Boc-amino)-3-(1-ethylpropyl)-3a,5,6,6a-tetrahydro-4H-cyclopent[d]isoxazole-4-carboxylic Acid Methyl Ester chemical structure

(3AR,4S,6R,6aS)-6-(N-Boc-amino)-3-(1-ethylpropyl)-3a,5,6,6a-tetrahydro-4H-cyclopent[d]isoxazole-4-carboxylic Acid Methyl Ester

CAS: 383910-24-5
Formula: C₁₈H₃₀N₂O₅
MW: 354.4 g/mol

VQ-033112

Reference Standard

(3AR,4S,6S,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol chemical structure

(3AR,4S,6S,6aS)-6-amino-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-ol

CAS: 2376278-80-5
Formula: C₈H₁₅NO₃
MW: 173.21 g/mol

VQ-028378

Reference Standard

(3AR,4S,7R,7aS)-2-(((1R,2S)-2-((4-(benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methyl)hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione chemical structure

(3AR,4S,7R,7aS)-2-(((1R,2S)-2-((4-(benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methyl)hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione

CAS: 1318074-18-8
Formula: C₂₈H₃₆N₄O₂S
MW: 492.7 g/mol

VQ-026545

Reference Standard

(3AR,4S,7R,7aS)-hexahydro-4,7-methanoisobenzofuran-1,3-dione chemical structure

(3AR,4S,7R,7aS)-hexahydro-4,7-methanoisobenzofuran-1,3-dione

CAS: 14166-28-0
Formula: C₉H₁₀O₃
MW: 166.17 g/mol

VQ-038196

Reference Standard

(3AR,4S,7S,7aS)-Hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione chemical structure

(3AR,4S,7S,7aS)-Hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione

CAS: 1932773-70-0
Formula: C₉H₁₁NO₂
MW: 165.19 g/mol

VQ-031695

Reference Standard

(3AR,5aR,8aR,8bS)-3a-(Chloromethyl)-2,2,7,7-tetramethyltetrahydro-5H-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran chemical structure

(3AR,5aR,8aR,8bS)-3a-(Chloromethyl)-2,2,7,7-tetramethyltetrahydro-5H-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran

CAS: 32785-90-3
Formula: C₁₂H₁₉ClO₅
MW: 278.73 g/mol

VQ-028461

Reference Standard

(3AS,12bR)-5-Chloro-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole chemical structure

(3AS,12bR)-5-Chloro-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole

CAS: 1422571-39-8
Formula: C₁₇H₁₆ClNO
MW: 285.8 g/mol

VQ-043964

Reference Standard

(3AS,4R,6aR)-Tetrahydro-4-methoxyfuro[3,4-b]furan-2(3H)-one chemical structure

(3AS,4R,6aR)-Tetrahydro-4-methoxyfuro[3,4-b]furan-2(3H)-one

CAS: 866594-61-8
Formula: C₇H₁₀O₄
MW: 158.15 g/mol

VQ-025204

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales