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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.

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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

4-(2-((6-(Bis(2-hydroxyethyl)amino)-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl)(2-hydroxyethyl)amino)ethoxy)-2,3-dihydroxy-4-oxobutanoic Acid chemical structure

4-(2-((6-(Bis(2-hydroxyethyl)amino)-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl)(2-hydroxyethyl)amino)ethoxy)-2,3-dihydroxy-4-oxobutanoic Acid

CAS: 2188148-58-3
Formula: C₂₈H₄₄N₈O₉
MW: 636.7 g/mol

VQ-036735

Reference Standard

4-(2-(2,2,2-Trifluoroacetyl)hydrazinyl)benzenesulfonamide chemical structure

4-(2-(2,2,2-Trifluoroacetyl)hydrazinyl)benzenesulfonamide

CAS: 915280-81-8
Formula: C₈H₈F₃N₃O₃S
MW: 283.23 g/mol

VQ-029724

Reference Standard

4-(2-(3-(Methoxycarbonyl)-5-oxo-1-(4-sulfophenyl)-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazineyl)benzenesulfonic Acid

4-(2-(3-(Methoxycarbonyl)-5-oxo-1-(4-sulfophenyl)-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazineyl)benzenesulfonic Acid

CAS: 791545-81-8
Formula: C₁₇H₁₄N₄O₉S₂
MW: 482.45 g/mol

VQ-042370

Reference Standard

4-(2-(3-Hydroxy-1-(phenylmethyl)-3-piperidinyl)acetyl)-3,3-dimethyl-2-piperazinone

4-(2-(3-Hydroxy-1-(phenylmethyl)-3-piperidinyl)acetyl)-3,3-dimethyl-2-piperazinone

CAS: 2223942-20-7
Formula: C₂₀H₂₉N₃O₃
MW: 359.46 g/mol

VQ-052121

Reference Standard

4-(2-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)propan-2-yl)phenethyl 4-methylbenzenesulfonate chemical structure

4-(2-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)propan-2-yl)phenethyl 4-methylbenzenesulfonate

CAS: 202189-76-2
Formula: C₂₃H₂₉NO₄S
MW: 415.5 g/mol

VQ-035968

Reference Standard

4-(2-(4',5-Disulfo-[1,1'-biphenyl]-2-yl)hydrazineylidene)-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic Acid chemical structure

4-(2-(4',5-Disulfo-[1,1'-biphenyl]-2-yl)hydrazineylidene)-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic Acid

CAS: 750530-77-9
Formula: C₂₂H₁₆N₄O₁₂S₃
MW: 624.6 g/mol

VQ-042369

Reference Standard

4-(2-(6-(4-Carboxypiperidin-1-yl)-5-chloronicotinamido)-4-(4-chlorothiophen-2-yl)thiazol-5-yl)-1-cyclohexylpiperazine 1-oxide chemical structure

4-(2-(6-(4-Carboxypiperidin-1-yl)-5-chloronicotinamido)-4-(4-chlorothiophen-2-yl)thiazol-5-yl)-1-cyclohexylpiperazine 1-oxide

CAS: 2681355-40-6
Formula: C₂₉H₃₄Cl₂N₆O₄S₂
MW: 665.7 g/mol

VQ-029298

Reference Standard

4-(2-(Dimethylamino)ethoxy)benzaldehyde chemical structure

4-(2-(Dimethylamino)ethoxy)benzaldehyde

CAS: 15182-92-0
Formula: C₁₁H₁₅NO₂
MW: 193.24 g/mol

VQ-042702

Reference Standard

4-(2-(Dimethylamino)ethoxy)benzaldehyde Hydrochloride chemical structure

4-(2-(Dimethylamino)ethoxy)benzaldehyde Hydrochloride

CAS: 841259-18-5
Formula: C₁₁H₁₆ClNO₂
MW: 229.7 g/mol

VQ-035503

Reference Standard

4-(2-(Dimethylamino)ethoxy)benzaldehyde oxime chemical structure

4-(2-(Dimethylamino)ethoxy)benzaldehyde oxime

CAS: 3421-72-5
Formula: C₁₁H₁₆N₂O₂
MW: 208.26 g/mol

VQ-031305

Reference Standard

4-(2-(Octyloxy)benzamido)benzoic Acid chemical structure

4-(2-(Octyloxy)benzamido)benzoic Acid

CAS: 51444-79-2
Formula: C₂₂H₂₇NO₄
MW: 369.5 g/mol

VQ-023423

Reference Standard

4-(2-(tert-Butylamino)-1-ethoxyethyl)-2-(hydroxymethyl)phenol chemical structure

4-(2-(tert-Butylamino)-1-ethoxyethyl)-2-(hydroxymethyl)phenol

CAS: 1221742-55-7
Formula: C₁₅H₂₅NO₃
MW: 267.36 g/mol

VQ-020753

Reference Standard

4-(2-Acetamidoethyl)benzenesulfonyl Chloride chemical structure

4-(2-Acetamidoethyl)benzenesulfonyl Chloride

CAS: 35450-53-4
Formula: C₁₀H₁₂ClNO₃S
MW: 261.73 g/mol

VQ-031001

Reference Standard

4-(2-Amino-1-ethoxyethyl)benzene-1,2-diol Hydrochloride chemical structure

4-(2-Amino-1-ethoxyethyl)benzene-1,2-diol Hydrochloride

CAS: 3805-00-3
Formula: C₁₀H₁₆ClNO₃
MW: 233.69 g/mol

VQ-038680

Reference Standard

4-(2-Amino-1-hydroxyethyl)-2-hydroxyphenyl hydrogen sulfate chemical structure

4-(2-Amino-1-hydroxyethyl)-2-hydroxyphenyl hydrogen sulfate

CAS: 35538-87-5
Formula: C₈H₁₁NO₆S
MW: 249.24 g/mol

VQ-026944

Reference Standard

4-(2-Aminoethyl)morpholine chemical structure

4-(2-Aminoethyl)morpholine

CAS: 2038-03-1
Formula: C₆H₁₄N₂O
MW: 130.19 g/mol

VQ-039794

Reference Standard

4-(2-Aminophenyl)-3-morpholinone chemical structure

4-(2-Aminophenyl)-3-morpholinone

CAS: 1082588-73-5
Formula: C₁₀H₁₂N₂O₂
MW: 192.21 g/mol

VQ-027849

Reference Standard

4-(2-Bromo-4,5-dimethoxybenzyl)-4-(2-(2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethoxy)ethyl)morpholin-4-ium Bromide chemical structure

4-(2-Bromo-4,5-dimethoxybenzyl)-4-(2-(2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethoxy)ethyl)morpholin-4-ium Bromide

CAS: 1235355-01-7
Formula: C₂₆H₃₉Br₂NO₄
MW: 589.4 g/mol

VQ-023497

Reference Standard

4-(2-Bromoethyl)-3-chloroindolin-2-one chemical structure

4-(2-Bromoethyl)-3-chloroindolin-2-one

CAS: 120427-95-4
Formula: C₁₀H₉BrClNO
MW: 274.54 g/mol

VQ-023672

Reference Standard

4-(2-Carboxypropan-2-yl)benzoic acid chemical structure

4-(2-Carboxypropan-2-yl)benzoic acid

CAS: 24911-30-6
Formula: C₁₁H₁₂O₄
MW: 208.21 g/mol

VQ-037253

Reference Standard

4-(2-Chloroethyl)morpholine chemical structure

4-(2-Chloroethyl)morpholine

CAS: 3240-94-6
Formula: C₆H₁₂ClNO
MW: 149.62 g/mol

VQ-027237

Reference Standard

4-(2-Chlorophenyl)-1,4-dihydro-2-(hydroxymethyl)-6-methyl-3,5-pyridinedicarboxylic Acid 3-Ethyl 5-Methyl Ester chemical structure

4-(2-Chlorophenyl)-1,4-dihydro-2-(hydroxymethyl)-6-methyl-3,5-pyridinedicarboxylic Acid 3-Ethyl 5-Methyl Ester

CAS: 79781-21-8
Formula: C₁₈H₂₀ClNO₅
MW: 365.8 g/mol

VQ-024256

Reference Standard

4-(2-Mercaptoethyl)phenol chemical structure

4-(2-Mercaptoethyl)phenol

CAS: 67382-72-3
Formula: C₈H₁₀OS
MW: 154.23 g/mol

VQ-036484

Reference Standard

4-(2-Methylpropoxy)-1,3-benzenedicarbothioamide chemical structure

4-(2-Methylpropoxy)-1,3-benzenedicarbothioamide

CAS: 1330632-46-6
Formula: C₁₂H₁₆N₂OS₂
MW: 268.4 g/mol

VQ-025741

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