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

6,6-Dimethyl-1-hepten-4-yn-3-ol chemical structure

6,6-Dimethyl-1-hepten-4-yn-3-ol

CAS: 78629-20-6
Formula: C₉H₁₄O
MW: 138.21 g/mol

VQ-032393

Reference Standard

6,6-Dimethyl-2-propyl-3-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-3,6-dihydro-4H-furo[3,4-d]imidazol-4-one chemical structure

6,6-Dimethyl-2-propyl-3-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-3,6-dihydro-4H-furo[3,4-d]imidazol-4-one

CAS: 761404-82-4
Formula: C₄₃H₃₈N₆O₂
MW: 670.8 g/mol

VQ-038746

Reference Standard

6,6'-Bis(2-methyl-2H-tetrazol-5-yl)-3,3'-bipyridine chemical structure

6,6'-Bis(2-methyl-2H-tetrazol-5-yl)-3,3'-bipyridine

CAS: 2095840-91-6
Formula: C₁₄H₁₂N₁₀
MW: 320.31 g/mol

VQ-023846

Reference Standard

6,6'-Sulfanediyldi-7H-purine chemical structure

6,6'-Sulfanediyldi-7H-purine

CAS: 90947-51-6
Formula: C₁₀H₆N₈S
MW: 270.28 g/mol

VQ-023071

Reference Standard

6,7-Bis(2-Methoxyethoxy)-4-methoxyquinazoline chemical structure

6,7-Bis(2-Methoxyethoxy)-4-methoxyquinazoline

CAS: 1312937-41-9
Formula: C₁₅H₂₀N₂O₅
MW: 308.33 g/mol

VQ-025587

Reference Standard

6,7-Bis(2-Methoxyethoxy)-N-phenylquinazolin-4-amine Hydrochloride chemical structure

6,7-Bis(2-Methoxyethoxy)-N-phenylquinazolin-4-amine Hydrochloride

CAS: 2055840-53-2
Formula: C₂₀H₂₄ClN₃O₄
MW: 405.9 g/mol

VQ-048252

Reference Standard

6,7-Dehydro Estradiol chemical structure

6,7-Dehydro Estradiol

CAS: 7291-41-0
Formula: C₁₈H₂₂O₂
MW: 270.4 g/mol

VQ-022583

Reference Standard

6,7-Dehydro Norethindrone Acetate chemical structure

6,7-Dehydro Norethindrone Acetate

CAS: 106765-04-2
Formula: C₂₂H₂₆O₃
MW: 338.4 g/mol

VQ-023281

Reference Standard

6,7-Dehydro Prednisolone 21-Acetate chemical structure

6,7-Dehydro Prednisolone 21-Acetate

CAS: 2427-45-4
Formula: C₂₃H₂₈O₆
MW: 400.5 g/mol

VQ-033299

Reference Standard

6,7-Dehydrohyoscyamine chemical structure

6,7-Dehydrohyoscyamine

CAS: 61616-97-5
Formula: C₁₇H₂₁NO₃
MW: 287.35 g/mol

VQ-037610

Reference Standard

6,7-Dibromo-4-[(dimethylamino)methyl]-5-hydroxy-1-methyl-2-[(phenylthio)methyl]-1H-Indole-3-carboxylic Acid Ethyl Ester chemical structure

6,7-Dibromo-4-[(dimethylamino)methyl]-5-hydroxy-1-methyl-2-[(phenylthio)methyl]-1H-Indole-3-carboxylic Acid Ethyl Ester

CAS: 153633-10-4
Formula: C₂₂H₂₄Br₂N₂O₃S
MW: 556.3 g/mol

VQ-021357

Reference Standard

6,7-Dihydro Rosuvastatin Sodium Salt chemical structure

6,7-Dihydro Rosuvastatin Sodium Salt

CAS: 1347362-67-7
Formula: C₂₂H₂₉FN₃NaO₆S
MW: 505.5 g/mol

VQ-043286

Reference Standard

6,7-Dihydroxyquinazolin-4(3H)-one chemical structure

6,7-Dihydroxyquinazolin-4(3H)-one

CAS: 16064-15-6
Formula: C₈H₆N₂O₃
MW: 178.14 g/mol

VQ-048628

Reference Standard

6,7-Dimethoxy-2,4-quinazolinediamine chemical structure

6,7-Dimethoxy-2,4-quinazolinediamine

CAS: 60547-96-8
Formula: C₁₀H₁₂N₄O₂
MW: 220.23 g/mol

VQ-023863

Reference Standard

6,7-Dimethoxy-4-(2-nitrophenoxy)quinoline chemical structure

6,7-Dimethoxy-4-(2-nitrophenoxy)quinoline

CAS: 190728-26-8
Formula: C₁₇H₁₄N₂O₅
MW: 326.3 g/mol

VQ-044565

Reference Standard

6,7-Dimethoxy-4-(3-nitrophenoxy)quinoline

6,7-Dimethoxy-4-(3-nitrophenoxy)quinoline

CAS: 202917-05-3
Formula: C₁₇H₁₄N₂O₅
MW: 326.3 g/mol

VQ-044566

Reference Standard

6,7-Dimethoxyisatin chemical structure

6,7-Dimethoxyisatin

CAS: 76159-91-6
Formula: C₁₀H₉NO₄
MW: 207.18 g/mol

VQ-043699

Reference Standard

6,7-Dimethoxyquinazoline chemical structure

6,7-Dimethoxyquinazoline

CAS: 4101-33-1
Formula: C₁₀H₁₀N₂O₂
MW: 190.2 g/mol

VQ-037444

Reference Standard

6,7,8,9-Dehydro Paliperidone Dihydrochloride chemical structure

6,7,8,9-Dehydro Paliperidone Dihydrochloride

CAS: 170359-61-2
Formula: C₂₃H₂₅Cl₂FN₄O₃
MW: 495.4 g/mol

VQ-033038

Reference Standard

6,7,8,9-Tetrahydro Carvedilol chemical structure

6,7,8,9-Tetrahydro Carvedilol

CAS: 1246820-73-4
Formula: C₂₄H₃₀N₂O₄
MW: 410.5 g/mol

VQ-021080

Reference Standard

6,8-Dibromo-3-cyclohexyl-2,3-dihydroquinazolin-4(1H)-one chemical structure

6,8-Dibromo-3-cyclohexyl-2,3-dihydroquinazolin-4(1H)-one

CAS: 2512203-87-9
Formula: C₁₄H₁₆Br₂N₂O
MW: 388.1 g/mol

VQ-043989

Reference Standard

6,8-Dibromo-3-cyclohexyl-3,4-dihydro-2(1H)-quinazolinone chemical structure

6,8-Dibromo-3-cyclohexyl-3,4-dihydro-2(1H)-quinazolinone

CAS: 21237-84-3
Formula: C₁₄H₁₆Br₂N₂O
MW: 388.1 g/mol

VQ-024670

Reference Standard

6,8-Dichloro Olaparib Acid impurity

6,8-Dichloro Olaparib Acid impurity

Formula: C₁₆H₉Cl₂FN₂O₃
MW: 367.16 g/mol

In stock

Reference Standard

6,8-Dihydroxy-3-(hydroxymethyl)-1H-2-benzopyran-1-one chemical structure

6,8-Dihydroxy-3-(hydroxymethyl)-1H-2-benzopyran-1-one

CAS: 62209-16-9
Formula: C₁₀H₈O₅
MW: 208.17 g/mol

VQ-040910

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