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Impurities & Reference Standards

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

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Methyl 4-(4-Fluorophenyl)-6-isopropyl-2-(methylsulfonyl)pyrimidine-5-carboxylate chemical structure

Methyl 4-(4-Fluorophenyl)-6-isopropyl-2-(methylsulfonyl)pyrimidine-5-carboxylate

CAS: 799842-06-1
Formula: C₁₆H₁₇FN₂O₄S
MW: 352.4 g/mol

VQ-033657

Reference Standard

Methyl 4-(4-Fluorophenyl)-6-isopropyl-2-[N-methyl-N-(methylsulfonyl)amino]pyrimidine-5-carboxylate chemical structure

Methyl 4-(4-Fluorophenyl)-6-isopropyl-2-[N-methyl-N-(methylsulfonyl)amino]pyrimidine-5-carboxylate

CAS: 289042-11-1
Formula: C₁₇H₂₀FN₃O₄S
MW: 381.4 g/mol

VQ-033658

Reference Standard

Methyl 4-(4-fluorophenyl)-6-isopropyl-2-oxo-1,2-dihydropyrimidine-5-carboxylate chemical structure

Methyl 4-(4-fluorophenyl)-6-isopropyl-2-oxo-1,2-dihydropyrimidine-5-carboxylate

CAS: 488798-37-4
Formula: C₁₅H₁₅FN₂O₃
MW: 290.29 g/mol

VQ-027917

Reference Standard

Methyl 4-(4-hydroxybut-1-yn-1-yl)benzoate chemical structure

Methyl 4-(4-hydroxybut-1-yn-1-yl)benzoate

CAS: 123910-86-1
Formula: C₁₂H₁₂O₃
MW: 204.22 g/mol

VQ-041376

Reference Standard

Methyl 4-(5-(4-(pentyloxy)phenyl)isoxazol-3-yl)benzoate chemical structure

Methyl 4-(5-(4-(pentyloxy)phenyl)isoxazol-3-yl)benzoate

CAS: 179162-64-2
Formula: C₂₂H₂₃NO₄
MW: 365.4 g/mol

VQ-026682

Reference Standard

Methyl 4-(7-(6-cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-2-fluorobenzoate chemical structure

Methyl 4-(7-(6-cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-2-fluorobenzoate

CAS: 1950587-19-5
Formula: C₂₁H₁₄F₄N₄O₃S
MW: 478.4 g/mol

VQ-021603

Reference Standard

Methyl 4-(acetylamino)-2-(2-bromoethoxy)-5-chlorobenzoate chemical structure

Methyl 4-(acetylamino)-2-(2-bromoethoxy)-5-chlorobenzoate

CAS: 748788-41-2
Formula: C₁₂H₁₃BrClNO₄
MW: 350.59 g/mol

VQ-041753

Reference Standard

Methyl 4-(bromomethyl)-3-nitrobenzoate chemical structure

Methyl 4-(bromomethyl)-3-nitrobenzoate

CAS: 88089-94-5
Formula: C₉H₈BrNO₄
MW: 274.07 g/mol

VQ-044633

Reference Standard

Methyl 4-(methylnitrosoamino)benzoate chemical structure

Methyl 4-(methylnitrosoamino)benzoate

CAS: 18600-49-2
Formula: C₉H₁₀N₂O₃
MW: 194.19 g/mol

VQ-045064

Reference Standard

Methyl 4-[(5-Amino-1-methylindol-3-yl)methyl]-3-methoxybenzoate chemical structure

Methyl 4-[(5-Amino-1-methylindol-3-yl)methyl]-3-methoxybenzoate

CAS: 107754-14-3
Formula: C₁₉H₂₀N₂O₃
MW: 324.4 g/mol

VQ-034722

Reference Standard

Methyl 4-Acetamido-2-hydroxybenzoate chemical structure

Methyl 4-Acetamido-2-hydroxybenzoate

CAS: 4093-28-1
Formula: C₁₀H₁₁NO₄
MW: 209.2 g/mol

VQ-025653

Reference Standard

Methyl 4-acetamido-3-bromo-2-(2-bromoethoxy)-5-chlorobenzoate chemical structure

Methyl 4-acetamido-3-bromo-2-(2-bromoethoxy)-5-chlorobenzoate

CAS: 748788-39-8
Formula: C₁₂H₁₂Br₂ClNO₄
MW: 429.49 g/mol

VQ-027679

Reference Standard

Methyl 4-acetamido-3-bromo-5-chloro-2-hydroxybenzoate chemical structure

Methyl 4-acetamido-3-bromo-5-chloro-2-hydroxybenzoate

CAS: 232941-14-9
Formula: C₁₀H₉BrClNO₄
MW: 322.54 g/mol

VQ-023585

Reference Standard

Methyl 4-acetamido-5-chloro-2,3-dihydrobenzofuran-7-carboxylate chemical structure

Methyl 4-acetamido-5-chloro-2,3-dihydrobenzofuran-7-carboxylate

CAS: 143878-29-9
Formula: C₁₂H₁₂ClNO₄
MW: 269.68 g/mol

VQ-041751

Reference Standard

Methyl 4-acetamido-5-iodo-2-methoxybenzoate chemical structure

Methyl 4-acetamido-5-iodo-2-methoxybenzoate

CAS: 201214-53-1
Formula: C₁₁H₁₂INO₄
MW: 349.12 g/mol

VQ-044723

Reference Standard

Methyl 4-acetamidobenzenesulfonate chemical structure

Methyl 4-acetamidobenzenesulfonate

CAS: 64704-11-6
Formula: C₉H₁₁NO₄S
MW: 229.26 g/mol

VQ-036571

Reference Standard

Methyl 4-acetyl-5-methylthiophene-2-carboxylate chemical structure

Methyl 4-acetyl-5-methylthiophene-2-carboxylate

CAS: 116368-65-1
Formula: C₉H₁₀O₃S
MW: 198.24 g/mol

VQ-038160

Reference Standard

Methyl 4-acetylamino-5-chloro-2-hydroxybenzoate chemical structure

Methyl 4-acetylamino-5-chloro-2-hydroxybenzoate

CAS: 24190-77-0
Formula: C₁₀H₁₀ClNO₄
MW: 243.64 g/mol

VQ-023584

Reference Standard

Methyl 4-amino-2-ethoxybenzoate chemical structure

Methyl 4-amino-2-ethoxybenzoate

CAS: 2486-55-7
Formula: C₁₀H₁₃NO₃
MW: 195.21 g/mol

VQ-025654

Reference Standard

Methyl 4-amino-2-methoxy-5-nitrobenzoate chemical structure

Methyl 4-amino-2-methoxy-5-nitrobenzoate

CAS: 59338-84-0
Formula: C₉H₁₀N₂O₅
MW: 226.19 g/mol

VQ-024200

Reference Standard

Methyl 4-amino-2-methoxybenzenecarboxylate chemical structure

Methyl 4-amino-2-methoxybenzenecarboxylate

CAS: 27492-84-8
Formula: C₉H₁₁NO₃
MW: 181.19 g/mol

VQ-031846

Reference Standard

Methyl 4-amino-3-chloro-2-methoxybenzoate chemical structure

Methyl 4-amino-3-chloro-2-methoxybenzoate

CAS: 121048-67-7
Formula: C₉H₁₀ClNO₃
MW: 215.63 g/mol

VQ-044627

Reference Standard

Methyl 4-amino-3-hydroxybenzenecarboxylate chemical structure

Methyl 4-amino-3-hydroxybenzenecarboxylate

CAS: 63435-16-5
Formula: C₈H₉NO₃
MW: 167.16 g/mol

VQ-042345

Reference Standard

Methyl 4-amino-5-chloro-2-hydroxybenzoate chemical structure

Methyl 4-amino-5-chloro-2-hydroxybenzoate

CAS: 129511-06-4
Formula: C₈H₈ClNO₃
MW: 201.61 g/mol

VQ-023583

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