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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

Clebopride Malate chemical structure

Clebopride Malate

CAS: 57645-91-7
Formula: C₂₄H₃₀ClN₃O₇
MW: 508 g/mol

VQ-036357

Reference Standard

Clemastine chemical structure

CAS: 15686-51-8
Formula: C₂₁H₂₆ClNO
MW: 343.9 g/mol

VQ-036358

Reference Standard

Clemastine EP Impurity A chemical structure

Clemastine EP Impurity A

CAS: 108825-05-4
Formula: C₂₁H₂₆ClNO₂
MW: 359.9 g/mol

VQ-021186

Reference Standard

Clemastine EP Impurity B chemical structure

Clemastine EP Impurity B

CAS: 1352549-49-5
Formula: C₂₁H₂₆ClNO
MW: 343.9 g/mol

VQ-025004

Reference Standard

Clemastine EP Impurity C chemical structure

Clemastine EP Impurity C

CAS: 59767-24-7
Formula: C₁₄H₁₃ClO
MW: 232.7 g/mol

VQ-021185

Reference Standard

Clemastine Fumarate chemical structure

Clemastine Fumarate

CAS: 14976-57-9
Formula: C₂₅H₃₀ClNO₅
MW: 460 g/mol

VQ-022213

Reference Standard

Clemastine Fumarate Impurity B chemical structure

Clemastine Fumarate Impurity B

CAS: 61771-18-4
Formula: C₂₁H₂₆ClNO
MW: 343.9 g/mol

VQ-036359

Reference Standard

Clenbuterol EP Impurity A chemical structure

Clenbuterol EP Impurity A

CAS: 62909-66-4
Formula: C₇H₅Cl₂NO
MW: 190.02 g/mol

VQ-025005

Reference Standard

Clenbuterol EP Impurity B chemical structure

Clenbuterol EP Impurity B

CAS: 69708-36-7
Formula: C₁₂H₁₆Cl₂N₂O
MW: 275.17 g/mol

VQ-045302

Reference Standard

Clenbuterol EP Impurity C chemical structure

Clenbuterol EP Impurity C

CAS: 37148-48-4
Formula: C₈H₇Cl₂NO
MW: 204.05 g/mol

VQ-025008

Reference Standard

Clenbuterol EP Impurity E chemical structure

Clenbuterol EP Impurity E

CAS: 37148-47-3
Formula: C₈H₆BrCl₂NO
MW: 282.95 g/mol

VQ-025007

Reference Standard

Clenbuterol EP Impurity F chemical structure

Clenbuterol EP Impurity F

CAS: 37153-52-9
Formula: C₁₂H₁₈BrClN₂O
MW: 321.64 g/mol

VQ-025006

Reference Standard

Clenbuterol-D9 hydrochloride chemical structure

Clenbuterol-D9 hydrochloride

CAS: 184006-60-8
Formula: C₁₂H₁₉Cl₃N₂O
MW: 322.7 g/mol

VQ-047815

Reference Standard

Clenpenterol chemical structure

CAS: 38339-21-8
Formula: C₁₃H₂₀Cl₂N₂O
MW: 291.21 g/mol

VQ-036362

Reference Standard

Clenpenterol Hydrochloride chemical structure

Clenpenterol Hydrochloride

CAS: 37158-47-7
Formula: C₁₃H₂₁Cl₃N₂O
MW: 327.7 g/mol

VQ-029839

Reference Standard

Clenproperol chemical structure

CAS: 38339-11-6
Formula: C₁₁H₁₆Cl₂N₂O
MW: 263.16 g/mol

VQ-036363

Reference Standard

Cleomycin A2 chemical structure

CAS: 754137-61-6
Formula: C₅₆H₈₃N₁₇O₂₁S₃
MW: 1426.6 g/mol

VQ-047603

Reference Standard

Clerosterol chemical structure

CAS: 2364-23-0
Formula: C₂₉H₄₈O
MW: 412.7 g/mol

VQ-029840

Reference Standard

Clethodim chemical structure

CAS: 99129-21-2
Formula: C₁₇H₂₆ClNO₃S
MW: 359.9 g/mol

VQ-029841

Reference Standard

Clethodim Bis oxime impurity

Clethodim Bis oxime impurity

CAS: 111031-48-2
Formula: C₁₇H₂₆Cl₂N₂O₂S
MW: 393.37 g/mol

VQ-036369

Reference Standard

Clethodim Imine

Clethodim Imine

CAS: 111031-25-5
Formula: C₁₄H₂₃NO₂S
MW: 269.4 g/mol

VQ-036366

Reference Standard

Clethodim Impurity 2 chemical structure

Clethodim Impurity 2

CAS: 29560-84-7
Formula: C₃H₅ClO
MW: 92.52 g/mol

VQ-047816

Reference Standard

Clethodim Impurity 3

Clethodim Impurity 3

CAS: 111031-71-1
Formula: C₁₆H₂₄ClNO₄
MW: 329.82 g/mol

VQ-047817

Reference Standard

Clethodim Impurity 5

Clethodim Impurity 5

CAS: 142808-66-0
Formula: C₁₇H₂₆ClNO₃S
MW: 359.91 g/mol

VQ-047818

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