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

(E)-N-(4-Fluorobenzyl)-1-(4-fluorophenyl)methanimine chemical structure

(E)-N-(4-Fluorobenzyl)-1-(4-fluorophenyl)methanimine

CAS: 1399883-72-7
Formula: C₁₄H₁₁F₂N
MW: 231.24 g/mol

VQ-045152

Reference Standard

(E)-N-(6-Amino-1,3-diethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3-(3,4-dimethoxyphenyl)acrylamide chemical structure

(E)-N-(6-Amino-1,3-diethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3-(3,4-dimethoxyphenyl)acrylamide

CAS: 187393-68-6
Formula: C₁₉H₂₄N₄O₅
MW: 388.4 g/mol

VQ-031301

Reference Standard

(E)-N-[2-(3,4-Dihydro-7-methoxy-1(2H)-naphthalenylidene)ethyl]acetamide chemical structure

(E)-N-[2-(3,4-Dihydro-7-methoxy-1(2H)-naphthalenylidene)ethyl]acetamide

CAS: 178677-39-9
Formula: C₁₅H₁₉NO₂
MW: 245.32 g/mol

VQ-024165

Reference Standard

(E)-N-Acetyl-N-desmethyl Doxepin chemical structure

(E)-N-Acetyl-N-desmethyl Doxepin

CAS: 250331-54-5
Formula: C₂₀H₂₁NO₂
MW: 307.4 g/mol

VQ-036810

Reference Standard

(E)-N-Cyclopropyl-2-methylpropan-1-imine

(E)-N-Cyclopropyl-2-methylpropan-1-imine

CAS: 27845-65-4
Formula: C₇H₁₃N
MW: 111.19 g/mol

VQ-037950

Reference Standard

(E)-N-Cyclopropylpropan-1-imine chemical structure

(E)-N-Cyclopropylpropan-1-imine

CAS: 27845-64-3
Formula: C₆H₁₁N
MW: 97.16 g/mol

VQ-040241

Reference Standard

(E)-N-Desmethyl-N-formyl Doxepin chemical structure

(E)-N-Desmethyl-N-formyl Doxepin

CAS: 250331-52-3
Formula: C₁₉H₁₉NO₂
MW: 293.4 g/mol

VQ-036811

Reference Standard

(E)-N-Methyl-2-((1-(2-(pyridin-2-yl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-6-yl)thio)benzamide chemical structure

(E)-N-Methyl-2-((1-(2-(pyridin-2-yl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-6-yl)thio)benzamide

CAS: 1443118-72-6
Formula: C₂₉H₂₅N₅OS
MW: 491.6 g/mol

VQ-029313

Reference Standard

(E)-N-Methyl-3-phenylprop-2-en-1-amine chemical structure

(E)-N-Methyl-3-phenylprop-2-en-1-amine

CAS: 83554-67-0
Formula: C₁₀H₁₃N
MW: 147.22 g/mol

VQ-022682

Reference Standard

(E)-N'-(1-Cyclopropyl-3-(2-fluoro-4-iodophenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)-N,N-dimethylformimidamide chemical structure

(E)-N'-(1-Cyclopropyl-3-(2-fluoro-4-iodophenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)-N,N-dimethylformimidamide

CAS: 871700-30-0
Formula: C₁₆H₁₆FIN₄O₂
MW: 442.23 g/mol

VQ-028473

Reference Standard

(E)-N'-(2-Cyano-4-nitrophenyl)-N,N-dimethylformimidamide chemical structure

(E)-N'-(2-Cyano-4-nitrophenyl)-N,N-dimethylformimidamide

CAS: 39263-34-8
Formula: C₁₀H₁₀N₄O₂
MW: 218.21 g/mol

VQ-044610

Reference Standard

(E)-N'-(2-Cyano-4,5-bis(2-methoxyethoxy)phenyl)-N,N-dimethylformimidamide chemical structure

(E)-N'-(2-Cyano-4,5-bis(2-methoxyethoxy)phenyl)-N,N-dimethylformimidamide

CAS: 950596-59-5
Formula: C₁₆H₂₃N₃O₄
MW: 321.37 g/mol

VQ-025584

Reference Standard

(E)-Olopatadine chemical structure

(E)-Olopatadine

CAS: 113806-06-7
Formula: C₂₁H₂₃NO₃
MW: 337.4 g/mol

VQ-023335

Reference Standard

(E)-Olopatadine Hydrochloride chemical structure

(E)-Olopatadine Hydrochloride

CAS: 949141-22-4
Formula: C₂₁H₂₄ClNO₃
MW: 373.9 g/mol

VQ-032248

Reference Standard

(E)-Phytol chemical structure

CAS: 150-86-7
Formula: C₂₀H₄₀O
MW: 296.5 g/mol

VQ-041472

Reference Standard

(E)-Pralidoxime Chloride chemical structure

(E)-Pralidoxime Chloride

CAS: 14018-50-9
Formula: C₇H₉ClN₂O
MW: 172.61 g/mol

VQ-033265

Reference Standard

(E)-S-Benzo[d]thiazol-2-yl 2-(2-aminothiazol-4-yl)-2-(methoxyimino)ethanethioate chemical structure

(E)-S-Benzo[d]thiazol-2-yl 2-(2-aminothiazol-4-yl)-2-(methoxyimino)ethanethioate

CAS: 1684396-27-7
Formula: C₁₃H₁₀N₄O₂S₃
MW: 350.4 g/mol

VQ-024886

Reference Standard

(E/Z)-3-[(2-Cyano-3-ethoxy-3-oxo-1-propenyl)amino]-1H-Pyrazole-4-carboxylic Acid Ethyl Ester chemical structure

(E/Z)-3-[(2-Cyano-3-ethoxy-3-oxo-1-propenyl)amino]-1H-Pyrazole-4-carboxylic Acid Ethyl Ester

CAS: 321571-07-7
Formula: C₁₂H₁₄N₄O₄
MW: 278.26 g/mol

VQ-021497

Reference Standard

(E/Z)-3-alpha-hydroxy-6-ethylidene-7-keto-5-beta-cholan-24-oic acid Methyl ester chemical structure

(E/Z)-3-alpha-hydroxy-6-ethylidene-7-keto-5-beta-cholan-24-oic acid Methyl ester

CAS: 863239-59-2
Formula: C₂₇H₄₂O₄
MW: 430.6 g/mol

VQ-032224

Reference Standard

(E/Z)-4-Hydroxy Tamoxifen chemical structure

(E/Z)-4-Hydroxy Tamoxifen

CAS: 68392-35-8
Formula: C₂₆H₂₉NO₂
MW: 387.5 g/mol

VQ-042358

Reference Standard

(E/Z)-Desbutyl Lumefantrine chemical structure

(E/Z)-Desbutyl Lumefantrine

CAS: 252990-19-5
Formula: C₂₆H₂₄Cl₃NO
MW: 472.8 g/mol

VQ-038193

Reference Standard

(E/Z)-Doxepin Glucuronide

(E/Z)-Doxepin Glucuronide

CAS: 788790-52-3
Formula: C₂₅H₂₉NO₇
MW: 455.51 g/mol

VQ-036808

Reference Standard

(E/Z)-Ensifentrine chemical structure

(E/Z)-Ensifentrine

CAS: 298680-25-8
Formula: C₂₆H₃₁N₅O₄
MW: 477.6 g/mol

VQ-025541

Reference Standard

(E/Z)-Olopatadine Carbaldehyde hydrochloride chemical structure

(E/Z)-Olopatadine Carbaldehyde hydrochloride

CAS: 2519517-78-1
Formula: C₂₀H₂₂ClNO₂
MW: 343.8 g/mol

VQ-032249

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