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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

Ethinylestradiol EP Impurity H chemical structure

Ethinylestradiol EP Impurity H

CAS: 1350468-76-6
Formula: C₂₀H₂₂O₃
MW: 310.4 g/mol

VQ-022581

Reference Standard

Ethinylestradiol EP Impurity J chemical structure

Ethinylestradiol EP Impurity J

CAS: 15071-66-6
Formula: C₂₁H₂₆O₂
MW: 310.4 g/mol

VQ-022580

Reference Standard

Ethinylestradiol EP Impurity K chemical structure

Ethinylestradiol EP Impurity K

CAS: 155683-61-7
Formula: C₂₁H₂₆O₂
MW: 310.4 g/mol

VQ-022575

Reference Standard

Ethinylestradiol EP Impurity M chemical structure

Ethinylestradiol EP Impurity M

CAS: 3240-39-9
Formula: C₂₁H₂₆O₂
MW: 310.4 g/mol

VQ-022579

Reference Standard

Ethinylestradiol Impurity M chemical structure

Ethinylestradiol Impurity M

CAS: 1818-11-7
Formula: C₂₁H₂₄O₂
MW: 308.4 g/mol

VQ-048293

Reference Standard

Ethion dioxon chemical structure

CAS: 22756-17-8
Formula: C₉H₂₂O₆P₂S₂
MW: 352.3 g/mol

VQ-040888

Reference Standard

Ethionamide chemical structure

CAS: 536-33-4
Formula: C₈H₁₀N₂S
MW: 166.25 g/mol

VQ-025650

Reference Standard

Ethionamide EP Impurity A chemical structure

Ethionamide EP Impurity A

CAS: 2196-13-6
Formula: C₆H₆N₂S
MW: 138.19 g/mol

VQ-030605

Reference Standard

Ethionamide EP Impurity F chemical structure

Ethionamide EP Impurity F

CAS: 37581-44-5
Formula: C₁₀H₁₂N₂
MW: 160.22 g/mol

VQ-025651

Reference Standard

Ethionamide-d5

CAS: 2749432-54-8
Formula: C₈H₅D₅N₂S
MW: 171.27 g/mol

VQ-037138

Reference Standard

Ethiprole chemical structure

CAS: 181587-01-9
Formula: C₁₃H₉Cl₂F₃N₄OS
MW: 397.2 g/mol

VQ-039658

Reference Standard

Ethisterone chemical structure

CAS: 434-03-7
Formula: C₂₁H₂₈O₂
MW: 312.4 g/mol

VQ-030607

Reference Standard

Ethofumesate chemical structure

CAS: 26225-79-6
Formula: C₁₃H₁₈O₅S
MW: 286.35 g/mol

VQ-040790

Reference Standard

Ethopabate chemical structure

CAS: 59-06-3
Formula: C₁₂H₁₅NO₄
MW: 237.25 g/mol

VQ-030608

Reference Standard

Ethopropazine chemical structure

CAS: 522-00-9
Formula: C₁₉H₂₄N₂S
MW: 312.5 g/mol

VQ-048303

Reference Standard

Ethoprophos chemical structure

CAS: 13194-48-4
Formula: C₈H₁₉O₂PS₂
MW: 242.3 g/mol

VQ-037139

Reference Standard

Ethosuximide chemical structure

CAS: 77-67-8
Formula: C₇H₁₁NO₂
MW: 141.17 g/mol

VQ-025656

Reference Standard

Ethosuximide EP Impurity A chemical structure

Ethosuximide EP Impurity A

CAS: 631-31-2
Formula: C₇H₁₂O₄
MW: 160.17 g/mol

VQ-025657

Reference Standard

Ethosuximide EP Impurity B chemical structure

Ethosuximide EP Impurity B

CAS: 50598-33-9
Formula: C₇H₁₀O₃
MW: 142.15 g/mol

VQ-025658

Reference Standard

Ethosuximide Impurity 2 chemical structure

Ethosuximide Impurity 2

CAS: 84590-14-7
Formula: C₈H₁₄O₄
MW: 174.19 g/mol

VQ-037140

Reference Standard

Ethotoin chemical structure

CAS: 86-35-1
Formula: C₁₁H₁₂N₂O₂
MW: 204.22 g/mol

VQ-043543

Reference Standard

Ethoxy Carbonyl Methyl Ester Impurity chemical structure

Ethoxy Carbonyl Methyl Ester Impurity

CAS: 1152440-23-7
Formula: C₁₉H₂₄O₅
MW: 332.4 g/mol

VQ-031667

Reference Standard

Ethoxyquine chemical structure

CAS: 91-53-2
Formula: C₁₄H₁₉NO
MW: 217.31 g/mol

VQ-040000

Reference Standard

Ethyl chemical structure

CAS: 357338-46-6
Formula: C₁₃H₂₇ClN₂O₃
MW: 294.82 g/mol

VQ-024652

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