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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.

28,554products

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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-(3-(Dimethylamino)-1-(pyridin-2-yl)propyl)-N,N-dimethylaniline chemical structure

4-(3-(Dimethylamino)-1-(pyridin-2-yl)propyl)-N,N-dimethylaniline

CAS: 694490-86-3
Formula: C₁₈H₂₅N₃
MW: 283.4 g/mol

VQ-027456

Reference Standard

4-(3-Amino-2-hydroxypropoxy)benzamide chemical structure

4-(3-Amino-2-hydroxypropoxy)benzamide

CAS: 1042779-86-1
Formula: C₁₀H₁₄N₂O₃
MW: 210.23 g/mol

VQ-029238

Reference Standard

4-(3-Aminophenyl)-2-methyl-3-butyn-2-ol chemical structure

4-(3-Aminophenyl)-2-methyl-3-butyn-2-ol

CAS: 69088-96-6
Formula: C₁₁H₁₃NO
MW: 175.23 g/mol

VQ-037054

Reference Standard

4-(3-Aminophenyl)morpholin-3-one chemical structure

4-(3-Aminophenyl)morpholin-3-one

CAS: 1082495-22-4
Formula: C₁₀H₁₂N₂O₂
MW: 192.21 g/mol

VQ-027848

Reference Standard

4-(3-Bromopropyl)-3,5-dimethyl-1H-pyrazole chemical structure

4-(3-Bromopropyl)-3,5-dimethyl-1H-pyrazole

CAS: 2167368-32-1
Formula: C₈H₁₃BrN₂
MW: 217.11 g/mol

VQ-040591

Reference Standard

4-(3-Bromopropyl)morpholine Hydrochloride chemical structure

4-(3-Bromopropyl)morpholine Hydrochloride

CAS: 134187-43-2
Formula: C₇H₁₅BrClNO
MW: 244.56 g/mol

VQ-044578

Reference Standard

4-(3-Carbamimidoylguanidino)benzoic acid chemical structure

4-(3-Carbamimidoylguanidino)benzoic acid

CAS: 22817-15-8
Formula: C₉H₁₁N₅O₂
MW: 221.22 g/mol

VQ-038346

Reference Standard

4-(3-Chlorobenzamido)-3-hydroxybenzoic Acid chemical structure

4-(3-Chlorobenzamido)-3-hydroxybenzoic Acid

CAS: 1179721-81-3
Formula: C₁₄H₁₀ClNO₄
MW: 291.68 g/mol

VQ-028191

Reference Standard

4-(3-Chlorophenyl)-1-nitrosopiperazine chemical structure

4-(3-Chlorophenyl)-1-nitrosopiperazine

CAS: 2219339-13-4
Formula: C₁₀H₁₂ClN₃O
MW: 225.67 g/mol

VQ-028486

Reference Standard

4-(3-Chlorophenyl)piperidine hydrochloride chemical structure

4-(3-Chlorophenyl)piperidine hydrochloride

CAS: 99329-70-1
Formula: C₁₁H₁₅Cl₂N
MW: 232.15 g/mol

VQ-044629

Reference Standard

4-(3-Chloropropyl)morpholine chemical structure

4-(3-Chloropropyl)morpholine

CAS: 7357-67-7
Formula: C₇H₁₄ClNO
MW: 163.64 g/mol

VQ-032804

Reference Standard

4-(3-Chlorothiophen-2-yl)thiazol-2-amine chemical structure

4-(3-Chlorothiophen-2-yl)thiazol-2-amine

CAS: 339114-12-4
Formula: C₇H₅ClN₂S₂
MW: 216.7 g/mol

VQ-035868

Reference Standard

4-(3-endo-Hydroxy-8-azabicyclo(3.2.1)oct-8-yl)naphthalene-1-carbonitrile chemical structure

4-(3-endo-Hydroxy-8-azabicyclo(3.2.1)oct-8-yl)naphthalene-1-carbonitrile

CAS: 870888-46-3
Formula: C₁₈H₁₈N₂O
MW: 278.3 g/mol

VQ-051866

Reference Standard

4-(3-Fluoro-benzyloxy)-benzaldehyde chemical structure

4-(3-Fluoro-benzyloxy)-benzaldehyde

CAS: 66742-57-2
Formula: C₁₄H₁₁FO₂
MW: 230.23 g/mol

VQ-023711

Reference Standard

4-(3-Formyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)benzonitrile chemical structure

4-(3-Formyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)benzonitrile

CAS: 2141947-89-7
Formula: C₂₀H₂₀BNO₄
MW: 349.2 g/mol

VQ-029938

Reference Standard

4-(3-Hydroxypropylamino)-1,3-dimethyluracil chemical structure

4-(3-Hydroxypropylamino)-1,3-dimethyluracil

CAS: 34654-80-3
Formula: C₉H₁₅N₃O₃
MW: 213.23 g/mol

VQ-028594

Reference Standard

4-(3-Iodo-1-isopropyl-1H-pyrazol-4-yl)pyrimidin-2-amine chemical structure

4-(3-Iodo-1-isopropyl-1H-pyrazol-4-yl)pyrimidin-2-amine

CAS: 1269440-54-1
Formula: C₁₀H₁₂IN₅
MW: 329.14 g/mol

VQ-025538

Reference Standard

4-(3-Isopropoxyphenyl)-1,3,4-trimethyl-1,2,3,4-tetrahydropyridine chemical structure

4-(3-Isopropoxyphenyl)-1,3,4-trimethyl-1,2,3,4-tetrahydropyridine

CAS: 145340-45-0
Formula: C₁₇H₂₅NO
MW: 259.4 g/mol

VQ-029080

Reference Standard

4-(3-Methoxypropoxy)-2,3-dimethylpyridin-1-ium-1-olate chemical structure

4-(3-Methoxypropoxy)-2,3-dimethylpyridin-1-ium-1-olate

CAS: 117977-18-1
Formula: C₁₁H₁₇NO₃
MW: 211.26 g/mol

VQ-027715

Reference Standard

4-(3,4-Dichlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-2-amine chemical structure

4-(3,4-Dichlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-2-amine

CAS: 944053-72-9
Formula: C₁₇H₁₇Cl₂N
MW: 306.2 g/mol

VQ-044366

Reference Standard

4-(3,5-Dinitrophenyl)morpholin-3-one chemical structure

4-(3,5-Dinitrophenyl)morpholin-3-one

CAS: 2138262-09-4
Formula: C₁₀H₉N₃O₆
MW: 267.19 g/mol

VQ-041965

Reference Standard

4-(4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-5-yl)benzyl)thiomorpholine 1,1-dioxide chemical structure

4-(4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-5-yl)benzyl)thiomorpholine 1,1-dioxide

CAS: 1257705-09-1
Formula: C₁₇H₁₉N₅O₂S
MW: 357.4 g/mol

VQ-030730

Reference Standard

4-(4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)picolinic Acid chemical structure

4-(4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)picolinic Acid

CAS: 1187945-05-6
Formula: C₂₀H₁₂ClF₄N₃O₄
MW: 469.8 g/mol

VQ-033484

Reference Standard

4-(4-(3-(4-Chloro-3(trifluoromethyl)phenyl)ureido)phenox yl)-n-ethylpicolinamide chemical structure

4-(4-(3-(4-Chloro-3(trifluoromethyl)phenyl)ureido)phenox yl)-n-ethylpicolinamide

CAS: 284461-82-1
Formula: C₂₂H₁₈ClF₃N₄O₃
MW: 478.8 g/mol

VQ-042236

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