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.

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

4-Amino-4-chlorodiphenyl Sulfone chemical structure

4-Amino-4-chlorodiphenyl Sulfone

CAS: 7146-68-1
Formula: C₁₂H₁₀ClNO₂S
MW: 267.73 g/mol

VQ-025187

Reference Standard

4-Amino-5-aminomethyl-2-methylpyrimidine chemical structure

4-Amino-5-aminomethyl-2-methylpyrimidine

CAS: 95-02-3
Formula: C₆H₁₀N₄
MW: 138.17 g/mol

VQ-023362

Reference Standard

4-Amino-5-aminomethyl-2-methylpyrimidine Dihydrochloride chemical structure

4-Amino-5-aminomethyl-2-methylpyrimidine Dihydrochloride

CAS: 874-43-1
Formula: C₆H₁₂Cl₂N₄
MW: 211.09 g/mol

VQ-042487

Reference Standard

4-Amino-5-chloro-2-hydroxybenzoic acid chemical structure

4-Amino-5-chloro-2-hydroxybenzoic acid

CAS: 21386-95-8
Formula: C₇H₆ClNO₃
MW: 187.58 g/mol

VQ-038505

Reference Standard

4-Amino-5-chloro-2-methoxybenzamide chemical structure

4-Amino-5-chloro-2-methoxybenzamide

CAS: 24190-74-7
Formula: C₈H₉ClN₂O₂
MW: 200.62 g/mol

VQ-032794

Reference Standard

4-Amino-5-chloro-2,3-dihydro-N-4-piperidinyl-7-benzofurancarboxamide chemical structure

4-Amino-5-chloro-2,3-dihydro-N-4-piperidinyl-7-benzofurancarboxamide

CAS: 137211-64-4
Formula: C₁₄H₁₈ClN₃O₂
MW: 295.76 g/mol

VQ-027678

Reference Standard

4-Amino-5-chloro-2,3-dihydro, 7-Benzofurancarboxamide chemical structure

4-Amino-5-chloro-2,3-dihydro, 7-Benzofurancarboxamide

CAS: 182808-16-8
Formula: C₉H₉ClN₂O₂
MW: 212.63 g/mol

VQ-033382

Reference Standard

4-Amino-5-chloro-N-((3S,4R)-1-(3-(4-fluorophenoxy)propyl)-3-hydroxypiperidin-4-yl)-2-methoxybenzamide chemical structure

4-Amino-5-chloro-N-((3S,4R)-1-(3-(4-fluorophenoxy)propyl)-3-hydroxypiperidin-4-yl)-2-methoxybenzamide

CAS: 104860-64-2
Formula: C₂₂H₂₇ClFN₃O₄
MW: 451.9 g/mol

VQ-044221

Reference Standard

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)benzofuran-7-carboxamide chemical structure

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)benzofuran-7-carboxamide

CAS: 1900715-96-9
Formula: C₁₈H₂₄ClN₃O₃
MW: 365.9 g/mol

VQ-027677

Reference Standard

4-Amino-5-chlorobenzene-1,3-disulfonamide chemical structure

4-Amino-5-chlorobenzene-1,3-disulfonamide

CAS: 1083-36-9
Formula: C₆H₈ClN₃O₄S₂
MW: 285.7 g/mol

VQ-021134

Reference Standard

4-Amino-5-hydroxymethyl-2- methylpyrimidine Hydrochloride chemical structure

4-Amino-5-hydroxymethyl-2- methylpyrimidine Hydrochloride

CAS: 13100-57-7
Formula: C₆H₁₀ClN₃O
MW: 175.61 g/mol

VQ-042484

Reference Standard

4-Amino-5,6-dichloro-1,3-benzenedisulfonamide chemical structure

4-Amino-5,6-dichloro-1,3-benzenedisulfonamide

CAS: 5250-72-6
Formula: C₆H₇Cl₂N₃O₄S₂
MW: 320.2 g/mol

VQ-031079

Reference Standard

4-Amino-5,6-dimethoxypyrimidine chemical structure

4-Amino-5,6-dimethoxypyrimidine

CAS: 5018-45-1
Formula: C₆H₉N₃O₂
MW: 155.15 g/mol

VQ-033976

Reference Standard

4-Amino-6-chloro-1,3-benzenedisulfonyl Dichloride chemical structure

4-Amino-6-chloro-1,3-benzenedisulfonyl Dichloride

CAS: 671-89-6
Formula: C₆H₄Cl₃NO₄S₂
MW: 324.6 g/mol

VQ-037591

Reference Standard

4-Amino-6-chlorobenzene-1,3-disulfonic Acid chemical structure

4-Amino-6-chlorobenzene-1,3-disulfonic Acid

CAS: 99418-26-5
Formula: C₆H₆ClNO₆S₂
MW: 287.7 g/mol

VQ-031080

Reference Standard

4-Amino-6-hydroxy-1,3-benzenedicarboxylic acid chemical structure

4-Amino-6-hydroxy-1,3-benzenedicarboxylic acid

CAS: 15540-79-1
Formula: C₈H₇NO₅
MW: 197.14 g/mol

VQ-029007

Reference Standard

4-Amino-6,7-dimethoxyquinazolin-2(1H)-one chemical structure

4-Amino-6,7-dimethoxyquinazolin-2(1H)-one

CAS: 664347-52-8
Formula: C₁₀H₁₁N₃O₃
MW: 221.21 g/mol

VQ-036800

Reference Standard

4-Amino-6,7-dimethoxyquinazolin-2(1H)-one Hydrochloride chemical structure

4-Amino-6,7-dimethoxyquinazolin-2(1H)-one Hydrochloride

CAS: 134749-43-2
Formula: C₁₀H₁₂ClN₃O₃
MW: 257.67 g/mol

VQ-030298

Reference Standard

4-Amino-7-bromo-pyrrolo[2,1-f][1,2,4]triazine chemical structure

4-Amino-7-bromo-pyrrolo[2,1-f][1,2,4]triazine

CAS: 937046-98-5
Formula: C₆H₅BrN₄
MW: 213.03 g/mol

VQ-044016

Reference Standard

4-Amino-7-iodopyrrolo[2,1-f][1,2,4]triazine chemical structure

4-Amino-7-iodopyrrolo[2,1-f][1,2,4]triazine

CAS: 1770840-43-1
Formula: C₆H₅IN₄
MW: 260.04 g/mol

VQ-033491

Reference Standard

4-Amino-N-(((4S,5R)-4-benzyl-2-oxooxazolidin-5-yl)methyl)-N-isobutylbenzenesulfonamide chemical structure

4-Amino-N-(((4S,5R)-4-benzyl-2-oxooxazolidin-5-yl)methyl)-N-isobutylbenzenesulfonamide

CAS: 1418639-27-6
Formula: C₂₁H₂₇N₃O₄S
MW: 417.5 g/mol

VQ-025201

Reference Standard

4-Amino-N-((2S,3S)-3-amino-2-hydroxy-4-phenylbutyl)-N-isobutylbenzenesulfonamide chemical structure

4-Amino-N-((2S,3S)-3-amino-2-hydroxy-4-phenylbutyl)-N-isobutylbenzenesulfonamide

CAS: 192800-79-6
Formula: C₂₀H₂₉N₃O₃S
MW: 391.5 g/mol

VQ-025203

Reference Standard

4-Amino-N-((3S,4R)-1-(3-(4-fluorophenoxy)propyl)-3-methoxypiperidin-4-yl)-2-methoxybenzamide chemical structure

4-Amino-N-((3S,4R)-1-(3-(4-fluorophenoxy)propyl)-3-methoxypiperidin-4-yl)-2-methoxybenzamide

CAS: 137472-65-2
Formula: C₂₃H₃₀FN₃O₄
MW: 431.5 g/mol

VQ-044222

Reference Standard

4-Amino-N-(4-((2-(diethylamino)ethyl)carbamoyl)phenyl)benzamide chemical structure

4-Amino-N-(4-((2-(diethylamino)ethyl)carbamoyl)phenyl)benzamide

CAS: 2773080-23-0
Formula: C₂₀H₂₆N₄O₂
MW: 354.4 g/mol

VQ-041673

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