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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

Colchicine EP Impurity G chemical structure

Colchicine EP Impurity G

CAS: 6901-14-0
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-022259

Reference Standard

Colchicine Hydrochloride chemical structure

Colchicine Hydrochloride

CAS: 34371-48-7
Formula: C₂₂H₂₆ClNO₆
MW: 435.9 g/mol

VQ-044322

Reference Standard

Colchicine Racemic Mixture Impurity chemical structure

Colchicine Racemic Mixture Impurity

CAS: 54192-66-4
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-029923

Reference Standard

Colchicine-d3 chemical structure

CAS: 1217625-62-1
Formula: C₂₂H₂₅NO₆
MW: 402.5 g/mol

VQ-029925

Reference Standard

Colchicine-d6 chemical structure

CAS: 1217651-73-4
Formula: C₂₂H₂₅NO₆
MW: 405.5 g/mol

VQ-029924

Reference Standard

Colesevelam Bromoquat Impurity chemical structure

Colesevelam Bromoquat Impurity

CAS: 32765-81-4
Formula: C₉H₂₁Br₂N
MW: 303.08 g/mol

VQ-025079

Reference Standard

Colesevelam Hydrochloride

Colesevelam Hydrochloride

CAS: 182815-44-7
Formula: (C₁₃H₂₇N.C₁₂H₂₇N₂.C₃H₇N.C₃H₅ClO.Cl)x.xClH
MW: 581.8 g/mol

VQ-025084

Reference Standard

Colesevelam Hydroxyquat Impurity

Colesevelam Hydroxyquat Impurity

CAS: 676578-21-5
Formula: C₉H₂₂NOCl
MW: 195.73 g/mol

VQ-029928

Reference Standard

Colesevelam Impurity 2 chemical structure

Colesevelam Impurity 2

CAS: 33968-67-1
Formula: C₉H₂₄Br₂N₂
MW: 320.11 g/mol

VQ-025077

Reference Standard

Colesevelam Methoxyquat Impurity

Colesevelam Methoxyquat Impurity

CAS: 863031-14-5
Formula: C₁₀H₂₄INO
MW: 301.21 g/mol

VQ-025080

Reference Standard

Colestipol Hydrochloride chemical structure

Colestipol Hydrochloride

CAS: 37296-80-3
Formula: C₈H₂₄ClN₅
MW: 225.76 g/mol

VQ-029930

Reference Standard

Colestyramine

CAS: 11041-12-6
Formula: (C₂₆H₄₀ClN)n
MW: 402.06 g/mol

VQ-050321

Reference Standard

Colistimethate sodium chemical structure

Colistimethate sodium

CAS: 8068-28-8
Formula: C₄₅H₈₅N₁₃O₁₀
MW: 968.2 g/mol

VQ-043460

Reference Standard

Colistin chemical structure

CAS: 1066-17-7
Formula: C₅₂H₉₈N₁₆O₁₃
MW: 1155.4 g/mol

VQ-036439

Reference Standard

Colistin A chemical structure

CAS: 7722-44-3
Formula: C₅₃H₁₀₀N₁₆O₁₃
MW: 1169.5 g/mol

VQ-036438

Reference Standard

Colistin A sulfate chemical structure

Colistin A sulfate

CAS: 207990-63-4
Formula: C₅₃H₁₀₂N₁₆O₁₇S
MW: 1267.5 g/mol

VQ-047867

Reference Standard

Colistin B chemical structure

CAS: 7239-48-7
Formula: C₅₂H₉₈N₁₆O₁₃
MW: 1155.4 g/mol

VQ-036440

Reference Standard

Colloidal Bismuth Subcitrate chemical structure

Colloidal Bismuth Subcitrate

CAS: 57644-54-9
Formula: C₁₂H₁₀BiK₃O₁₄
MW: 704.47 g/mol

VQ-036441

Reference Standard

Conduritol B Epoxide chemical structure

Conduritol B Epoxide

CAS: 6090-95-5
Formula: C₆H₁₀O₅
MW: 162.14 g/mol

VQ-041031

Reference Standard

Conjugated Estrogens chemical structure

Conjugated Estrogens

CAS: 12126-59-9
Formula: C₁₈H₂₁NaO₅S
MW: 372.4 g/mol

VQ-037098

Reference Standard

Contezolid chemical structure

CAS: 1112968-42-9
Formula: C₁₈H₁₅F₃N₄O₄
MW: 408.3 g/mol

VQ-041962

Reference Standard

Copanlisib chemical structure

CAS: 1032568-63-0
Formula: C₂₃H₂₈N₈O₄
MW: 480.5 g/mol

VQ-043725

Reference Standard

Copovidone

CAS: 25086-89-9
Formula: NA

VQ-043124

Reference Standard

Coprostanol chemical structure

CAS: 360-68-9
Formula: C₂₇H₄₈O
MW: 388.7 g/mol

VQ-039641

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