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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

(S)-Tedizolid chemical structure

CAS: 1431699-67-0
Formula: C₁₇H₁₅FN₆O₃
MW: 370.3 g/mol

VQ-023843

Reference Standard

(S)-Tenofovir chemical structure

CAS: 147127-19-3
Formula: C₉H₁₄N₅O₄P
MW: 287.21 g/mol

VQ-034108

Reference Standard

(S)-Tenofovir Disoproxil Fumarate chemical structure

(S)-Tenofovir Disoproxil Fumarate

CAS: 1432630-26-6
Formula: C₂₃H₃₄N₅O₁₄P
MW: 635.5 g/mol

VQ-028254

Reference Standard

(S)-tert-Butyl (1-phenylbut-3-en-2-yl)carbamate chemical structure

(S)-tert-Butyl (1-phenylbut-3-en-2-yl)carbamate

CAS: 107202-43-7
Formula: C₁₅H₂₁NO₂
MW: 247.33 g/mol

VQ-035816

Reference Standard

(S)-Tert-Butyl 2,6-dimethyl-3-oxohept-1-en-4-ylcarbamate chemical structure

(S)-Tert-Butyl 2,6-dimethyl-3-oxohept-1-en-4-ylcarbamate

CAS: 247068-81-1
Formula: C₁₄H₂₅NO₃
MW: 255.35 g/mol

VQ-024797

Reference Standard

(S)-tert-Butyl 3-(4-Aminophenyl)piperidine-1-carboxylate chemical structure

(S)-tert-Butyl 3-(4-Aminophenyl)piperidine-1-carboxylate

CAS: 1171197-20-8
Formula: C₁₆H₂₄N₂O₂
MW: 276.37 g/mol

VQ-035363

Reference Standard

(S)-Tetrahydrocolumbamine chemical structure

(S)-Tetrahydrocolumbamine

CAS: 483-34-1
Formula: C₂₀H₂₃NO₄
MW: 341.4 g/mol

VQ-040045

Reference Standard

(S)-Valiolamine Voglibose chemical structure

(S)-Valiolamine Voglibose

CAS: 1303996-66-8
Formula: C₁₇H₃₄N₂O₁₁
MW: 442.5 g/mol

VQ-034673

Reference Standard

(S)-Vilanterol chemical structure

CAS: 2514963-34-7
Formula: C₂₄H₃₃Cl₂NO₅
MW: 486.4 g/mol

VQ-024008

Reference Standard

(S)-Viloxazine Hydrochloride chemical structure

(S)-Viloxazine Hydrochloride

CAS: 56287-61-7
Formula: C₁₃H₂₀ClNO₃
MW: 273.75 g/mol

VQ-034631

Reference Standard

(S)-Zearalanone chemical structure

(S)-Zearalanone

CAS: 5975-78-0
Formula: C₁₈H₂₄O₅
MW: 320.4 g/mol

VQ-042998

Reference Standard

(S)-β-Isopropylphenethylamine chemical structure

(S)-β-Isopropylphenethylamine

CAS: 106498-32-2
Formula: C₁₁H₁₇N
MW: 163.26 g/mol

VQ-022820

Reference Standard

(SR) & (RS)-Deutetrabenazine chemical structure

(SR) & (RS)-Deutetrabenazine

CAS: 2244238-16-0
Formula: C₁₉H₂₇NO₃
MW: 323.5 g/mol

VQ-034174

Reference Standard

(SS,SS)-Nebivolol chemical structure

(SS,SS)-Nebivolol

CAS: 119365-28-5
Formula: C₂₂H₂₅F₂NO₄
MW: 405.4 g/mol

VQ-023217

Reference Standard

(Stearoyl-2-lyso-sn-glycero-3-phosphocholine) chemical structure

(Stearoyl-2-lyso-sn-glycero-3-phosphocholine)

CAS: 19420-57-6
Formula: C₂₆H₅₄NO₇P
MW: 523.7 g/mol

VQ-032767

Reference Standard

(Trans)-4-Propyl-1-methyl-L-proline chemical structure

(Trans)-4-Propyl-1-methyl-L-proline

CAS: 13380-36-4
Formula: C₉H₁₇NO₂
MW: 171.24 g/mol

VQ-031578

Reference Standard

(Z,Z)-5-(2-Methyl-3-phenyl-propenylidene)-4-oxo-2-thioxo-3-thiazolidineacetic Acid chemical structure

(Z,Z)-5-(2-Methyl-3-phenyl-propenylidene)-4-oxo-2-thioxo-3-thiazolidineacetic Acid

CAS: 124782-63-4
Formula: C₁₅H₁₃NO₃S₂
MW: 319.4 g/mol

VQ-043151

Reference Standard

(Z)-1-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-yl)ethanone Oxime chemical structure

(Z)-1-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-yl)ethanone Oxime

CAS: 64211-06-9
Formula: C₁₁H₉Cl₂N₃O
MW: 270.11 g/mol

VQ-027330

Reference Standard

(Z)-1-(5-Bromo-4-methylthiophen-2-yl)-4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-2-en-1-one

(Z)-1-(5-Bromo-4-methylthiophen-2-yl)-4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-2-en-1-one

CAS: 2758907-92-3
Formula: C₁₅H₇BrCl₃F₃OS
MW: 478.5 g/mol

VQ-048962

Reference Standard

(Z)-1-(Benzo[b]thiophen-2-yl) ethanone oxime chemical structure

(Z)-1-(Benzo[b]thiophen-2-yl) ethanone oxime

CAS: 147396-08-5
Formula: C₁₀H₉NOS
MW: 191.25 g/mol

VQ-034742

Reference Standard

(Z)-1-(Naphthalen-1-yl)ethanone Oxime chemical structure

(Z)-1-(Naphthalen-1-yl)ethanone Oxime

CAS: 100485-59-4
Formula: C₁₂H₁₁NO
MW: 185.22 g/mol

VQ-024975

Reference Standard

(Z)-1,1'-(2-(2,4-Difluorophenyl)prop-1-ene-1,3-diyl)bis(1H-1,2,4-triazole) chemical structure

(Z)-1,1'-(2-(2,4-Difluorophenyl)prop-1-ene-1,3-diyl)bis(1H-1,2,4-triazole)

CAS: 163921-62-8
Formula: C₁₃H₁₀F₂N₆
MW: 288.26 g/mol

VQ-037313

Reference Standard

(Z)-2-(1-(2-Cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl)-4-(methylthio)piperidin-3-ylidene)acetic acid

(Z)-2-(1-(2-Cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl)-4-(methylthio)piperidin-3-ylidene)acetic acid

CAS: 1007602-99-4
Formula: C₁₉H₂₂FNO₃S
MW: 363.45 g/mol

VQ-044004

Reference Standard

(Z)-2-(1-(2-Cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl)-4-mercaptopiperidin-3-ylidene)acetic Acid chemical structure

(Z)-2-(1-(2-Cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl)-4-mercaptopiperidin-3-ylidene)acetic Acid

CAS: 204204-73-9
Formula: C₁₈H₂₀FNO₃S
MW: 349.4 g/mol

VQ-033284

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