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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

Cefaclor EP Impurity E chemical structure

Cefaclor EP Impurity E

CAS: 188915-50-6
Formula: C₁₄H₁₄ClN₃O₄S
MW: 355.8 g/mol

VQ-021083

Reference Standard

Cefaclor EP Impurity F chemical structure

Cefaclor EP Impurity F

CAS: 2882-18-0
Formula: C₁₀H₈N₂O
MW: 172.18 g/mol

VQ-021081

Reference Standard

Cefaclor EP Impurity G chemical structure

Cefaclor EP Impurity G

CAS: 67308-21-8
Formula: C₁₆H₁₇N₃O₄S
MW: 347.4 g/mol

VQ-021084

Reference Standard

Cefaclor Monohydrate chemical structure

Cefaclor Monohydrate

CAS: 70356-03-5
Formula: C₁₅H₁₆ClN₃O₅S
MW: 385.8 g/mol

VQ-022048

Reference Standard

Cefaclor-d5 chemical structure

CAS: 1426173-90-1
Formula: C₁₅H₁₄ClN₃O₄S
MW: 372.8 g/mol

VQ-036181

Reference Standard

Cefadroxil chemical structure

CAS: 50370-12-2
Formula: C₁₆H₁₇N₃O₅S
MW: 363.4 g/mol

VQ-024831

Reference Standard

Cefadroxil Dimer chemical structure

Cefadroxil Dimer

CAS: 2378158-45-1
Formula: C₃₂H₃₂N₆O₉S₂
MW: 708.8 g/mol

VQ-022054

Reference Standard

Cefadroxil EP Impurity C (Mixture of isomers) chemical structure

Cefadroxil EP Impurity C (Mixture of isomers)

CAS: 147103-96-6
Formula: C₁₆H₁₉N₃O₆S
MW: 381.4 g/mol

VQ-024832

Reference Standard

Cefadroxil EP Impurity D chemical structure

Cefadroxil EP Impurity D

CAS: 144790-28-3
Formula: C₁₆H₁₇N₃O₅S
MW: 363.4 g/mol

VQ-022051

Reference Standard

Cefadroxil EP Impurity E chemical structure

Cefadroxil EP Impurity E

CAS: 147103-93-3
Formula: C₁₁H₁₁N₃O₃
MW: 233.22 g/mol

VQ-022053

Reference Standard

Cefadroxil EP Impurity G chemical structure

Cefadroxil EP Impurity G

CAS: 34876-35-2
Formula: C₅H₆O₂S
MW: 130.17 g/mol

VQ-021125

Reference Standard

Cefadroxil EP Impurity H chemical structure

Cefadroxil EP Impurity H

CAS: 146794-70-9
Formula: C₁₃H₁₈N₂O₄S
MW: 298.36 g/mol

VQ-021127

Reference Standard

Cefadroxil ethyl homolog chemical structure

Cefadroxil ethyl homolog

CAS: 2243976-70-5
Formula: C₁₇H₁₉N₃O₅S
MW: 377.4 g/mol

VQ-022058

Reference Standard

Cefadroxil Monohydrate chemical structure

Cefadroxil Monohydrate

CAS: 66592-87-8
Formula: C₁₆H₁₉N₃O₆S
MW: 381.4 g/mol

VQ-019500

Reference Standard

Cefadroxil Sulfoxide chemical structure

Cefadroxil Sulfoxide

CAS: 182290-77-3
Formula: C₁₆H₁₇N₃O₆S
MW: 379.4 g/mol

VQ-022055

Reference Standard

Cefalexin EP Impurity A chemical structure

Cefalexin EP Impurity A

CAS: 875-74-1
Formula: C₈H₉NO₂
MW: 151.16 g/mol

In stock

Reference Standard

Cefalexin EP Impurity F chemical structure

Cefalexin EP Impurity F

CAS: 79750-46-2
Formula: C₁₆H₁₇N₃O₄S
MW: 347.4 g/mol

VQ-020695

Reference Standard

Cefalexin Impurity 1 chemical structure

Cefalexin Impurity 1

CAS: 65870-51-1
Formula: C₁₁H₁₁N₃O₂
MW: 217.22 g/mol

VQ-036182

Reference Standard

Cefalonium chemical structure

CAS: 5575-21-3
Formula: C₂₀H₁₈N₄O₅S₂
MW: 458.5 g/mol

VQ-029677

Reference Standard

Cefalonium Hydrate chemical structure

Cefalonium Hydrate

CAS: 1486466-27-6
Formula: C₂₀H₂₀N₄O₆S₂
MW: 476.5 g/mol

VQ-047705

Reference Standard

Cefalotin EP Impurity A chemical structure

Cefalotin EP Impurity A

CAS: 34691-02-6
Formula: C₁₄H₁₄N₂O₄S₂
MW: 338.4 g/mol

VQ-029678

Reference Standard

Cefalotin EP Impurity B chemical structure

Cefalotin EP Impurity B

CAS: 5935-65-9
Formula: C₁₄H₁₄N₂O₅S₂
MW: 354.4 g/mol

VQ-024835

Reference Standard

Cefamandole chemical structure

CAS: 34444-01-4
Formula: C₁₈H₁₈N₆O₅S₂
MW: 462.5 g/mol

VQ-047706

Reference Standard

Cefamandole Nafate chemical structure

Cefamandole Nafate

CAS: 42540-40-9
Formula: C₁₉H₁₇N₆NaO₆S₂
MW: 512.5 g/mol

VQ-036185

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