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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

1-Stearoyl-rac-glycerol chemical structure

1-Stearoyl-rac-glycerol

CAS: 123-94-4
Formula: C₂₁H₄₂O₄
MW: 358.6 g/mol

VQ-037542

Reference Standard

1-tert-Butoxy-4-(2-methoxy-ethyl)-benzene chemical structure

1-tert-Butoxy-4-(2-methoxy-ethyl)-benzene

CAS: 84697-14-3
Formula: C₁₃H₂₀O₂
MW: 208.3 g/mol

VQ-032356

Reference Standard

1-Tritylimidazole-4-carboxaldehyde chemical structure

1-Tritylimidazole-4-carboxaldehyde

CAS: 33016-47-6
Formula: C₂₃H₁₈N₂O
MW: 338.4 g/mol

VQ-027086

Reference Standard

1-β-D-Ribofuranosyl-3-guanylurea Picrate chemical structure

1-β-D-Ribofuranosyl-3-guanylurea Picrate

CAS: 4336-46-3
Formula: C₁₃H₁₇N₇O₁₂
MW: 463.31 g/mol

VQ-020863

Reference Standard

1-β-Hydroxy Vitamin D2 chemical structure

1-β-Hydroxy Vitamin D2

CAS: 127516-23-8
Formula: C₂₈H₄₄O₂
MW: 412.6 g/mol

VQ-030305

Reference Standard

1, 3-Dimethyl-2-pyrrolidone chemical structure

1, 3-Dimethyl-2-pyrrolidone

CAS: 19597-07-0
Formula: C₆H₁₁NO
MW: 113.16 g/mol

VQ-039037

Reference Standard

1,1-(Naphthalene-1,5-diyl)bis(N-methylmethanamine) chemical structure

1,1-(Naphthalene-1,5-diyl)bis(N-methylmethanamine)

CAS: 2847776-06-9
Formula: C₁₄H₁₈N₂
MW: 214.31 g/mol

VQ-042442

Reference Standard

1,1-Bis[(4-Fluorophenyl)methyl]-3-[(4-isobutoxyphenyl)methyl]urea chemical structure

1,1-Bis[(4-Fluorophenyl)methyl]-3-[(4-isobutoxyphenyl)methyl]urea

CAS: 2518374-84-8
Formula: C₂₆H₂₈F₂N₂O₂
MW: 438.5 g/mol

VQ-027493

Reference Standard

1,1-Cyclohexane diacetic acid monoamide chemical structure

1,1-Cyclohexane diacetic acid monoamide

CAS: 99189-60-3
Formula: C₁₀H₁₇NO₃
MW: 199.25 g/mol

VQ-025944

Reference Standard

1,1-Cyclohexane Diacetic Monoamide chemical structure

1,1-Cyclohexane Diacetic Monoamide

CAS: 887589-52-8
Formula: C₁₀H₁₈N₂O₂
MW: 198.26 g/mol

VQ-048490

Reference Standard

1,1-Cyclohexanediacetic Anhydride chemical structure

1,1-Cyclohexanediacetic Anhydride

CAS: 1010-26-0
Formula: C₁₀H₁₄O₃
MW: 182.22 g/mol

VQ-043686

Reference Standard

1,1-Cyclopentanediacetic Anhydride chemical structure

1,1-Cyclopentanediacetic Anhydride

CAS: 5662-95-3
Formula: C₉H₁₂O₃
MW: 168.19 g/mol

VQ-029561

Reference Standard

1,1-Dichloro-2,2-dimethoxyethane chemical structure

1,1-Dichloro-2,2-dimethoxyethane

CAS: 80944-06-5
Formula: C₄H₈Cl₂O₂
MW: 159.01 g/mol

VQ-041608

Reference Standard

1,1-Dicyano-2-methoxy-2-(4-phenoxyphenyl)ethene chemical structure

1,1-Dicyano-2-methoxy-2-(4-phenoxyphenyl)ethene

CAS: 330792-69-3
Formula: C₁₇H₁₂N₂O₂
MW: 276.29 g/mol

VQ-026098

Reference Standard

1,1-Dicyano-2-methoxy-4-dimethylamino-1,3-butadiene chemical structure

1,1-Dicyano-2-methoxy-4-dimethylamino-1,3-butadiene

CAS: 95689-38-6
Formula: C₉H₁₁N₃O
MW: 177.2 g/mol

VQ-045360

Reference Standard

1,1-Dimethyl-3-cyanoguanidine chemical structure

1,1-Dimethyl-3-cyanoguanidine

CAS: 1609-06-9
Formula: C₄H₈N₄
MW: 112.13 g/mol

VQ-034813

Reference Standard

1,1-Dimethyl-3-hydroxypyrrolidinium Bromide chemical structure

1,1-Dimethyl-3-hydroxypyrrolidinium Bromide

CAS: 51052-74-5
Formula: C₆H₁₄BrNO
MW: 196.09 g/mol

VQ-026015

Reference Standard

1,1-Dimethylethyl (2S)-3-ethoxy-5,6-dihydro-2-methyl-1(2H)-pyrazinecarboxylate

1,1-Dimethylethyl (2S)-3-ethoxy-5,6-dihydro-2-methyl-1(2H)-pyrazinecarboxylate

CAS: 1338375-20-4
Formula: C₁₂H₂₂N₂O₃
MW: 242.31 g/mol

VQ-048609

Reference Standard

1,1-Dimethylethyl 4-[2-[(2,4-dimethylphenyl)thio]phenyl]-1-piperazinecarboxylate chemical structure

1,1-Dimethylethyl 4-[2-[(2,4-dimethylphenyl)thio]phenyl]-1-piperazinecarboxylate

CAS: 960203-42-3
Formula: C₂₃H₃₀N₂O₂S
MW: 398.6 g/mol

VQ-034704

Reference Standard

1,1-Dimethylethyl N-[(1S)-2-[1,1′-biphenyl]-4-yl-1-formylethyl]carbamate chemical structure

1,1-Dimethylethyl N-[(1S)-2-[1,1′-biphenyl]-4-yl-1-formylethyl]carbamate

CAS: 182192-86-5
Formula: C₂₀H₂₃NO₃
MW: 325.4 g/mol

VQ-033730

Reference Standard

1,1-Dimethylethyl N-[2-[(3-methylbutyl)amino]-2-oxo-1-(phenylmethyl)ethyl]carbamate

1,1-Dimethylethyl N-[2-[(3-methylbutyl)amino]-2-oxo-1-(phenylmethyl)ethyl]carbamate

CAS: 1323229-57-7
Formula: C₁₉H₃₀N₂O₃
MW: 334.46 g/mol

VQ-039481

Reference Standard

1,1-Dimethylsilanediol chemical structure

1,1-Dimethylsilanediol

CAS: 1066-42-8
Formula: C₂H₈O₂Si
MW: 92.17 g/mol

VQ-033857

Reference Standard

1,1-Diphenyl-3-(piperidin-1-yl)propyl methanesulfonate chemical structure

1,1-Diphenyl-3-(piperidin-1-yl)propyl methanesulfonate

CAS: 53639-82-0
Formula: C₂₁H₂₇NO₃S
MW: 373.5 g/mol

VQ-027623

Reference Standard

1,1,1,2-Tetrafluoro-2-(1,2,2,2-tetrafluoroethoxy)ethane chemical structure

1,1,1,2-Tetrafluoro-2-(1,2,2,2-tetrafluoroethoxy)ethane

CAS: 67429-44-1
Formula: C₄H₂F₈O
MW: 218.04 g/mol

VQ-036621

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