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.

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

Clethodim Impurity 6

Clethodim Impurity 6

CAS: 111031-45-9
Formula: C₂₃H₃₄Cl₃N₃O₃S
MW: 538.96 g/mol

VQ-047819

Reference Standard

Clethodim Impurity 8

Clethodim Impurity 8

CAS: 111031-49-3
Formula: C₁₅H₂₀ClNO₃
MW: 297.78 g/mol

VQ-047820

Reference Standard

Clethodim Impurity 9

Clethodim Impurity 9

CAS: 835923-00-7
Formula: C₂₅H₃₈ClNO₃S₂
MW: 500.16 g/mol

VQ-047821

Reference Standard

Clethodim Oxazole chemical structure

Clethodim Oxazole

CAS: 111059-49-5
Formula: C₁₄H₂₁NO₂S
MW: 267.39 g/mol

VQ-036364

Reference Standard

Clethodim Oxazole Sulfoxide chemical structure

Clethodim Oxazole Sulfoxide

CAS: 111031-20-0
Formula: C₁₄H₂₁NO₃S
MW: 283.39 g/mol

VQ-036365

Reference Standard

Clethodim sulfoxide chemical structure

Clethodim sulfoxide

CAS: 111031-14-2
Formula: C₁₇H₂₆ClNO₄S
MW: 375.9 g/mol

VQ-032659

Reference Standard

Clevidipine Butyrate chemical structure

Clevidipine Butyrate

CAS: 167221-71-8
Formula: C₂₁H₂₃Cl₂NO₆
MW: 456.3 g/mol

VQ-025009

Reference Standard

Clevidipine butyrate Impurity CLE 04

Clevidipine butyrate Impurity CLE 04

CAS: 1346550-33-1
Formula: C₁₆H₁₆Cl₂O₅
MW: 359.2 g/mol

VQ-021191

Reference Standard

Clevidipine Dibutyryl Impurity

Clevidipine Dibutyryl Impurity

CAS: 253597-19-2
Formula: C₂₅H₂₉Cl₂NO₈
MW: 542.41 g/mol

VQ-021190

Reference Standard

Clevidipine Impurity A chemical structure

Clevidipine Impurity A

CAS: 123853-39-4
Formula: C₁₆H₁₅Cl₂NO₄
MW: 356.2 g/mol

VQ-021193

Reference Standard

Clevidipine Isopropyl Ester chemical structure

Clevidipine Isopropyl Ester

CAS: 2177293-82-0
Formula: C₂₃H₂₇Cl₂NO₆
MW: 484.4 g/mol

VQ-047822

Reference Standard

Clidafidine chemical structure

CAS: 33588-20-4
Formula: C₉H₈Cl₂N₂O
MW: 231.08 g/mol

VQ-044201

Reference Standard

Clidinium Bromide chemical structure

Clidinium Bromide

CAS: 3485-62-9
Formula: C₂₂H₂₆BrNO₃
MW: 432.3 g/mol

VQ-029842

Reference Standard

Climbazole chemical structure

CAS: 38083-17-9
Formula: C₁₅H₁₇ClN₂O₂
MW: 292.76 g/mol

VQ-036371

Reference Standard

Clindamycin 2-Palmitate chemical structure

Clindamycin 2-Palmitate

CAS: 36688-78-5
Formula: C₃₄H₆₃ClN₂O₆S
MW: 663.4 g/mol

VQ-029851

Reference Standard

Clindamycin 2-Phosphate Sulfoxide chemical structure

Clindamycin 2-Phosphate Sulfoxide

CAS: 1228573-90-7
Formula: C₁₈H₃₄ClN₂O₉PS
MW: 521 g/mol

VQ-025014

Reference Standard

Clindamycin 2-Phosphate Sulfoxide Isomer A chemical structure

Clindamycin 2-Phosphate Sulfoxide Isomer A

CAS: 887402-20-2
Formula: C₁₈H₃₄ClN₂O₉PS
MW: 521 g/mol

VQ-036377

Reference Standard

Clindamycin 2-Phosphate Sulfoxide Isomer B chemical structure

Clindamycin 2-Phosphate Sulfoxide Isomer B

CAS: 887402-21-3
Formula: C₁₈H₃₄ClN₂O₉PS
MW: 521 g/mol

VQ-036376

Reference Standard

Clindamycin 3-Palmitate chemical structure

Clindamycin 3-Palmitate

CAS: 68225-59-2
Formula: C₃₄H₆₃ClN₂O₆S
MW: 663.4 g/mol

VQ-025023

Reference Standard

Clindamycin B Palmitate chemical structure

Clindamycin B Palmitate

CAS: 68206-99-5
Formula: C₃₃H₆₁ClN₂O₆S
MW: 649.4 g/mol

VQ-025020

Reference Standard

Clindamycin Diastereomer 2-Phosphate chemical structure

Clindamycin Diastereomer 2-Phosphate

CAS: 1800297-62-4
Formula: C₁₈H₃₄ClN₂O₈PS
MW: 505 g/mol

VQ-029849

Reference Standard

Clindamycin EP Impurity B chemical structure

Clindamycin EP Impurity B

CAS: 18323-43-8
Formula: C₁₇H₃₁ClN₂O₅S
MW: 411 g/mol

VQ-022216

Reference Standard

Clindamycin EP Impurity C chemical structure

Clindamycin EP Impurity C

CAS: 16684-06-3
Formula: C₁₈H₃₃ClN₂O₅S
MW: 425 g/mol

VQ-025013

Reference Standard

Clindamycin Heptadecanoate chemical structure

Clindamycin Heptadecanoate

CAS: 1123211-69-7
Formula: C₃₅H₆₅ClN₂O₆S
MW: 677.4 g/mol

VQ-025019

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