Skip to content

Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

14,098products

1,516in stock

COA + SDSwith every lot

Reference Standard

2-(2-Cyanophenyl)benzonitrile chemical structure

2-(2-Cyanophenyl)benzonitrile

CAS: 4341-02-0
Formula: C₁₄H₈N₂
MW: 204.23 g/mol

VQ-032402

Reference Standard

2-(2-Diethylaminoethoxy)ethanol chemical structure

2-(2-Diethylaminoethoxy)ethanol

CAS: 140-82-9
Formula: C₈H₁₉NO₂
MW: 161.24 g/mol

VQ-021031

Reference Standard

2-(2-Ethoxyphenoxy)ethyl Methanesulfonate chemical structure

2-(2-Ethoxyphenoxy)ethyl Methanesulfonate

CAS: 169506-15-4
Formula: C₁₁H₁₆O₅S
MW: 260.31 g/mol

VQ-032723

Reference Standard

2-(2-Ethoxyphenoxymethyl)oxirane chemical structure

2-(2-Ethoxyphenoxymethyl)oxirane

CAS: 5296-35-5
Formula: C₁₁H₁₄O₃
MW: 194.23 g/mol

VQ-042906

Reference Standard

2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-one chemical structure

2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-one

CAS: 224789-21-3
Formula: C₁₇H₂₀N₄O₂
MW: 312.37 g/mol

VQ-023984

Reference Standard

2-(2-Fluoro-[1,1'-biphenyl]-4-yl)-2-methylmalonic Acid chemical structure

2-(2-Fluoro-[1,1'-biphenyl]-4-yl)-2-methylmalonic Acid

CAS: 42771-82-4
Formula: C₁₆H₁₃FO₄
MW: 288.27 g/mol

VQ-037372

Reference Standard

2-(2-Fluorophenyl)-5-(5-iodo-2-methylbenzyl)thiophene chemical structure

2-(2-Fluorophenyl)-5-(5-iodo-2-methylbenzyl)thiophene

CAS: 2436275-33-9
Formula: C₁₈H₁₄FIS
MW: 408.3 g/mol

VQ-044149

Reference Standard

2-(2-Fluorophenyl)thiophene chemical structure

2-(2-Fluorophenyl)thiophene

CAS: 209592-45-0
Formula: C₁₀H₇FS
MW: 178.23 g/mol

VQ-029596

Reference Standard

2-(2-Formylphenoxy)hexanoic acid chemical structure

2-(2-Formylphenoxy)hexanoic acid

CAS: 138320-27-1
Formula: C₁₃H₁₆O₄
MW: 236.26 g/mol

VQ-029112

Reference Standard

2-(2-Iminothiazolidin-3-yl)-1-phenylethanol hydrochloride chemical structure

2-(2-Iminothiazolidin-3-yl)-1-phenylethanol hydrochloride

CAS: 17899-33-1
Formula: C₁₁H₁₅ClN₂OS
MW: 258.77 g/mol

VQ-048849

Reference Standard

2-(2-Isobutylphenyl)propanoic Acid chemical structure

2-(2-Isobutylphenyl)propanoic Acid

CAS: 69363-33-3
Formula: C₁₃H₁₈O₂
MW: 206.28 g/mol

VQ-026124

Reference Standard

2-(2-Methoxyethyl)phenol chemical structure

2-(2-Methoxyethyl)phenol

CAS: 330976-39-1
Formula: C₉H₁₂O₂
MW: 152.19 g/mol

VQ-032561

Reference Standard

2-(2-Methoxyphenoxy)-N-methylethanamine chemical structure

2-(2-Methoxyphenoxy)-N-methylethanamine

CAS: 72955-82-9
Formula: C₁₀H₁₅NO₂
MW: 181.23 g/mol

VQ-049095

Reference Standard

2-(2-Methoxyphenoxy)ethylamine hydrochloride monohydrate chemical structure

2-(2-Methoxyphenoxy)ethylamine hydrochloride monohydrate

CAS: 2057412-43-6
Formula: C₉H₁₆ClNO₃
MW: 221.68 g/mol

VQ-022035

Reference Standard

2-(2-Methyl-2H-tetrazol-5-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine chemical structure

2-(2-Methyl-2H-tetrazol-5-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

CAS: 1056039-83-8
Formula: C₁₃H₁₈BN₅O₂
MW: 287.13 g/mol

VQ-023842

Reference Standard

2-(2-Methyl-3-nitrophenyl)-N,N-dipropylacetamide chemical structure

2-(2-Methyl-3-nitrophenyl)-N,N-dipropylacetamide

CAS: 91374-22-0
Formula: C₁₅H₂₂N₂O₃
MW: 278.35 g/mol

VQ-041999

Reference Standard

2-(2-Methyl-3-nitrophenyl)ethan-1-ol chemical structure

2-(2-Methyl-3-nitrophenyl)ethan-1-ol

CAS: 855382-76-2
Formula: C₉H₁₁NO₃
MW: 181.19 g/mol

VQ-032953

Reference Standard

2-(2-Methyl-4-nitro-1H-imidazol-1-yl)ethyl Benzoate chemical structure

2-(2-Methyl-4-nitro-1H-imidazol-1-yl)ethyl Benzoate

CAS: 87009-72-1
Formula: C₁₃H₁₃N₃O₄
MW: 275.26 g/mol

VQ-031860

Reference Standard

2-(2-Methylphenyl)benzonitrile chemical structure

2-(2-Methylphenyl)benzonitrile

CAS: 157366-46-6
Formula: C₁₄H₁₁N
MW: 193.24 g/mol

VQ-043217

Reference Standard

2-(2-tert-Butoxyethoxy)-1H-isoindole-1,3(2H)-dione chemical structure

2-(2-tert-Butoxyethoxy)-1H-isoindole-1,3(2H)-dione

CAS: 870243-67-7
Formula: C₁₄H₁₇NO₄
MW: 263.29 g/mol

VQ-033805

Reference Standard

2-(2,3-Dichlorphenyl)-2-(guanidinylimino)acetonitrile chemical structure

2-(2,3-Dichlorphenyl)-2-(guanidinylimino)acetonitrile

CAS: 84689-20-3
Formula: C₉H₇Cl₂N₅
MW: 256.09 g/mol

VQ-026342

Reference Standard

2-(2,3-Difluorophenyl)cyclopropan-1-amine chemical structure

2-(2,3-Difluorophenyl)cyclopropan-1-amine

CAS: 1274778-02-7
Formula: C₉H₉F₂N
MW: 169.17 g/mol

VQ-034254

Reference Standard

2-(2,3-Dihydroxy-3,7,11,15-tetramethylhexadecyl)-3-methylnaphthalene-1,4-dione chemical structure

2-(2,3-Dihydroxy-3,7,11,15-tetramethylhexadecyl)-3-methylnaphthalene-1,4-dione

CAS: 107759-10-4
Formula: C₃₁H₄₈O₄
MW: 484.7 g/mol

VQ-033166

Reference Standard

2-(2,3-Dihydroxypropyl)isoindoline-1,3-dione chemical structure

2-(2,3-Dihydroxypropyl)isoindoline-1,3-dione

CAS: 62457-35-6
Formula: C₁₁H₁₁NO₄
MW: 221.21 g/mol

VQ-033597

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