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-Chloro-6-Fluorobenzoic Acid chemical structure

2-Chloro-6-Fluorobenzoic Acid

CAS: 434-75-3
Formula: C₇H₄ClFO₂
MW: 174.55 g/mol

VQ-039909

Reference Standard

2-Chloro-6-methoxypurine chemical structure

2-Chloro-6-methoxypurine

CAS: 1198-46-5
Formula: C₆H₅ClN₄O
MW: 184.58 g/mol

VQ-027170

Reference Standard

2-Chloro-7-Cyclopentyl-7H-Pyrrolo[2,3-d]Pyrimidine-6-Carbaldehyde chemical structure

2-Chloro-7-Cyclopentyl-7H-Pyrrolo[2,3-d]Pyrimidine-6-Carbaldehyde

CAS: 1211443-55-8
Formula: C₁₂H₁₂ClN₃O
MW: 249.69 g/mol

VQ-032738

Reference Standard

2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic Acid chemical structure

2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic Acid

CAS: 1211443-58-1
Formula: C₁₂H₁₂ClN₃O₂
MW: 265.69 g/mol

VQ-027793

Reference Standard

2-Chloro-7-cyclopentyl-N-methyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide chemical structure

2-Chloro-7-cyclopentyl-N-methyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

CAS: 1211444-14-2
Formula: C₁₃H₁₅ClN₄O
MW: 278.74 g/mol

VQ-033525

Reference Standard

2-Chloro-9-(2-chloro-2-deoxy-β-D-arabinofuranosyl)purin-6-amine chemical structure

2-Chloro-9-(2-chloro-2-deoxy-β-D-arabinofuranosyl)purin-6-amine

CAS: 111615-20-4
Formula: C₁₀H₁₁Cl₂N₅O₃
MW: 320.13 g/mol

VQ-029862

Reference Standard

2-Chloro-N-((1,3-dimethyl-1H-pyrazol-4-yl)sulfonyl)-6-(3-(3,3,3-trifluoro-2,2-dimethylpropoxy)-1H-pyrazol-1-yl)nicotinamide chemical structure

2-Chloro-N-((1,3-dimethyl-1H-pyrazol-4-yl)sulfonyl)-6-(3-(3,3,3-trifluoro-2,2-dimethylpropoxy)-1H-pyrazol-1-yl)nicotinamide

CAS: 2229861-18-9
Formula: C₁₉H₂₀ClF₃N₆O₄S
MW: 520.9 g/mol

VQ-025507

Reference Standard

2-Chloro-N-(1,1-dimethyl-2-phenyl-ethyl)-N-methyl-acetamide chemical structure

2-Chloro-N-(1,1-dimethyl-2-phenyl-ethyl)-N-methyl-acetamide

CAS: 2293-55-2
Formula: C₁₃H₁₈ClNO
MW: 239.74 g/mol

VQ-044394

Reference Standard

2-Chloro-N-(2-(2-chlorobenzoyl)-4-nitrophenyl)benzamide chemical structure

2-Chloro-N-(2-(2-chlorobenzoyl)-4-nitrophenyl)benzamide

CAS: 24863-73-8
Formula: C₂₀H₁₂Cl₂N₂O₄
MW: 415.2 g/mol

VQ-044833

Reference Standard

2-Chloro-N-(2-chloro-4-methyl-3-pyridinyl)-3-pyridinecarboxamide chemical structure

2-Chloro-N-(2-chloro-4-methyl-3-pyridinyl)-3-pyridinecarboxamide

CAS: 133627-46-0
Formula: C₁₂H₉Cl₂N₃O
MW: 282.12 g/mol

VQ-032110

Reference Standard

2-Chloro-N-(2-chloroethyl)-N-methyl-2-phenylethan-1-amine chemical structure

2-Chloro-N-(2-chloroethyl)-N-methyl-2-phenylethan-1-amine

CAS: 22270-22-0
Formula: C₁₁H₁₅Cl₂N
MW: 232.15 g/mol

VQ-031953

Reference Standard

2-Chloro-N-(2-oxo-2-phenylethyl)acetamide chemical structure

2-Chloro-N-(2-oxo-2-phenylethyl)acetamide

CAS: 65385-18-4
Formula: C₁₀H₁₀ClNO₂
MW: 211.64 g/mol

VQ-047747

Reference Standard

2-Chloro-N-(2,3-dimethylphenyl)benzamide chemical structure

2-Chloro-N-(2,3-dimethylphenyl)benzamide

CAS: 196617-88-6
Formula: C₁₅H₁₄ClNO
MW: 259.73 g/mol

VQ-039448

Reference Standard

2-Chloro-N-(2,5-dimethylphenyl)acetamide chemical structure

2-Chloro-N-(2,5-dimethylphenyl)acetamide

CAS: 5177-35-5
Formula: C₁₀H₁₂ClNO
MW: 197.66 g/mol

VQ-048885

Reference Standard

2-Chloro-N-(3-chloro-2-methylphenyl)nicotinamide chemical structure

2-Chloro-N-(3-chloro-2-methylphenyl)nicotinamide

CAS: 57841-61-9
Formula: C₁₃H₁₀Cl₂N₂O
MW: 281.13 g/mol

VQ-023017

Reference Standard

2-Chloro-N-(3-methoxyphenyl)acetamide chemical structure

2-Chloro-N-(3-methoxyphenyl)acetamide

CAS: 17641-08-6
Formula: C₉H₁₀ClNO₂
MW: 199.63 g/mol

VQ-035131

Reference Standard

2-Chloro-N-(4-chloro-2-(2-chlorobenzoyl)phenyl)acetamide chemical structure

2-Chloro-N-(4-chloro-2-(2-chlorobenzoyl)phenyl)acetamide

CAS: 14405-03-9
Formula: C₁₅H₁₀Cl₃NO₂
MW: 342.6 g/mol

VQ-035444

Reference Standard

2-Chloro-N-(4-ethylphenyl)-N-(2,3,5,6-tetrafluorophenyl)acetamide chemical structure

2-Chloro-N-(4-ethylphenyl)-N-(2,3,5,6-tetrafluorophenyl)acetamide

CAS: 332903-68-1
Formula: C₁₆H₁₂ClF₄NO
MW: 345.72 g/mol

VQ-027869

Reference Standard

2-Chloro-N-(methylsulfonyl)acetamide chemical structure

2-Chloro-N-(methylsulfonyl)acetamide

CAS: 202658-88-6
Formula: C₃H₆ClNO₃S
MW: 171.6 g/mol

VQ-032462

Reference Standard

2-Chloro-N-[2-(2-chlorobenzoyl)-4-nitrophenyl]acetamide chemical structure

2-Chloro-N-[2-(2-chlorobenzoyl)-4-nitrophenyl]acetamide

CAS: 180854-85-7
Formula: C₁₅H₁₀Cl₂N₂O₄
MW: 353.2 g/mol

VQ-039806

Reference Standard

2-Chloro-N-[4-(trifluoromethyl)phenyl]acetamide chemical structure

2-Chloro-N-[4-(trifluoromethyl)phenyl]acetamide

CAS: 2707-23-5
Formula: C₉H₇ClF₃NO
MW: 237.6 g/mol

VQ-037919

Reference Standard

2-Chloro-N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine chemical structure

2-Chloro-N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

CAS: 1616760-97-4
Formula: C₁₃H₁₈ClN₅
MW: 279.77 g/mol

VQ-044084

Reference Standard

2-Chloro-N-phenethylacetamide chemical structure

2-Chloro-N-phenethylacetamide

CAS: 13156-95-1
Formula: C₁₀H₁₂ClNO
MW: 197.66 g/mol

VQ-041606

Reference Standard

2-Chloro-N-phenylaniline chemical structure

2-Chloro-N-phenylaniline

CAS: 1205-40-9
Formula: C₁₂H₁₀ClN
MW: 203.67 g/mol

VQ-036674

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