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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

3'-Hydroxy Valbenazine chemical structure

3'-Hydroxy Valbenazine

CAS: 2237934-70-0
Formula: C₂₄H₃₈N₂O₅
MW: 434.6 g/mol

VQ-035156

Reference Standard

3'-Hydroxystanozolol chemical structure

3'-Hydroxystanozolol

CAS: 125709-39-9
Formula: C₂₁H₃₂N₂O₂
MW: 344.5 g/mol

VQ-044547

Reference Standard

3'-O-(5'-Deoxy-alpha-D-ribofuranosyl) Capecitabine chemical structure

3'-O-(5'-Deoxy-alpha-D-ribofuranosyl) Capecitabine

CAS: 1262133-68-5
Formula: C₂₀H₃₀FN₃O₉
MW: 475.5 g/mol

VQ-021975

Reference Standard

3'-Sialyllactose Sodium Salt chemical structure

3'-Sialyllactose Sodium Salt

CAS: 128596-80-5
Formula: C₂₃H₃₈NNaO₁₉
MW: 655.5 g/mol

VQ-040490

Reference Standard

3',4'-Bis(hydroxyethyl)rutoside chemical structure

3',4'-Bis(hydroxyethyl)rutoside

CAS: 862127-01-3
Formula: C₃₁H₃₈O₁₈
MW: 698.6 g/mol

VQ-042725

Reference Standard

3',4'-Difluoro[1,1'-biphenyl]-2-amine chemical structure

3',4'-Difluoro[1,1'-biphenyl]-2-amine

CAS: 873056-62-3
Formula: C₁₂H₉F₂N
MW: 205.2 g/mol

VQ-038819

Reference Standard

3',5'-di-O-Benzyl Entecavir chemical structure

3',5'-di-O-Benzyl Entecavir

CAS: 142217-81-0
Formula: C₂₆H₂₇N₅O₃
MW: 457.5 g/mol

VQ-030493

Reference Standard

3',6'-Dihydroxy-4'-iodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, Disodium Salt chemical structure

3',6'-Dihydroxy-4'-iodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, Disodium Salt

CAS: 52010-86-3
Formula: C₂₀H₉INa₂O₅
MW: 502.2 g/mol

VQ-037324

Reference Standard

3''-O-Demethyl ivermectin chemical structure

3''-O-Demethyl ivermectin

CAS: 92137-95-6
Formula: C₄₇H₇₂O₁₄
MW: 861.1 g/mol

VQ-031345

Reference Standard

3'(S)-Hydroxy Simvastatin chemical structure

3'(S)-Hydroxy Simvastatin

CAS: 133645-46-2
Formula: C₂₅H₃₈O₆
MW: 434.6 g/mol

VQ-035076

Reference Standard

3(6R,7R)-Hydroxy-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Diphenylmethyl Ester chemical structure

3(6R,7R)-Hydroxy-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Diphenylmethyl Ester

CAS: 54639-48-4
Formula: C₂₈H₂₄N₂O₅S
MW: 500.6 g/mol

VQ-028927

Reference Standard

3(R,S)-Hydroxy Desogestrel chemical structure

3(R,S)-Hydroxy Desogestrel

CAS: 869627-85-0
Formula: C₂₂H₃₀O₂
MW: 326.5 g/mol

VQ-030138

Reference Standard

3′-Hydroxybupivacaine chemical structure

3′-Hydroxybupivacaine

CAS: 51989-46-9
Formula: C₁₈H₂₈N₂O₂
MW: 304.4 g/mol

VQ-047641

Reference Standard

31-Hydroxy-3-[[(4-methyl-1-piperazinyl)imino]methyl]rifamycin

31-Hydroxy-3-[[(4-methyl-1-piperazinyl)imino]methyl]rifamycin

CAS: 1187639-50-4
Formula: C₄₃H₅₈N₄O₁₃
MW: 839 g/mol

VQ-041897

Reference Standard

31-O-Desmethyl tacrolimus chemical structure

31-O-Desmethyl tacrolimus

CAS: 135635-47-1
Formula: C₄₃H₆₇NO₁₂
MW: 790 g/mol

VQ-042333

Reference Standard

32-O-Demethyl-rapamycin chemical structure

32-O-Demethyl-rapamycin

CAS: 141392-23-6
Formula: C₅₀H₇₇NO₁₃
MW: 900.1 g/mol

VQ-042189

Reference Standard

3a-Hydroxy Pravastatin Lactone chemical structure

3a-Hydroxy Pravastatin Lactone

CAS: 85798-96-5
Formula: C₂₃H₃₄O₆
MW: 406.5 g/mol

VQ-041604

Reference Standard

3a-Phenylacetoxy Tropane chemical structure

3a-Phenylacetoxy Tropane

CAS: 1690-22-8
Formula: C₁₆H₂₁NO₂
MW: 259.34 g/mol

VQ-029286

Reference Standard

3Alpha,12Alpha-Dihydroxy-5Beta-chol-9(11)-enic Acid chemical structure

3Alpha,12Alpha-Dihydroxy-5Beta-chol-9(11)-enic Acid

CAS: 24637-46-5
Formula: C₂₄H₃₈O₄
MW: 390.6 g/mol

VQ-028600

Reference Standard

3alpha,5alpha-Tetrahydronorethisterone chemical structure

3alpha,5alpha-Tetrahydronorethisterone

CAS: 16392-60-2
Formula: C₂₀H₃₀O₂
MW: 302.5 g/mol

VQ-032211

Reference Standard

3alpha,7beta-Dihydroxy-12-oxo-5beta-cholan-24-oic Acid chemical structure

3alpha,7beta-Dihydroxy-12-oxo-5beta-cholan-24-oic Acid

CAS: 81873-91-8
Formula: C₂₄H₃₈O₅
MW: 406.6 g/mol

VQ-028597

Reference Standard

3b,5b-Dihydroxy Drospirenone Ring-opened Alcohol Impurity chemical structure

3b,5b-Dihydroxy Drospirenone Ring-opened Alcohol Impurity

CAS: 82543-18-8
Formula: C₂₄H₃₈O₄
MW: 390.6 g/mol

VQ-025422

Reference Standard

3beta-Hydroxy-5alpha-Pregnan-20-One chemical structure

3beta-Hydroxy-5alpha-Pregnan-20-One

CAS: 516-55-2
Formula: C₂₁H₃₄O₂
MW: 318.5 g/mol

VQ-041692

Reference Standard

3beta-Hydroxy-delta5-cholenic acid chemical structure

3beta-Hydroxy-delta5-cholenic acid

CAS: 5255-17-4
Formula: C₂₄H₃₈O₃
MW: 374.6 g/mol

VQ-039586

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