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-Chlor-1,4-Bis-Trichlormethyl-Benzol chemical structure

2-Chlor-1,4-Bis-Trichlormethyl-Benzol

CAS: 10388-10-0
Formula: C₈H₃Cl₇
MW: 347.3 g/mol

VQ-043709

Reference Standard

2-Chloro Adenosine chemical structure

2-Chloro Adenosine

CAS: 146-77-0
Formula: C₁₀H₁₂ClN₅O₄
MW: 301.69 g/mol

VQ-033480

Reference Standard

2-Chloro Clomiphene Citrate (E/Z Mixture) chemical structure

2-Chloro Clomiphene Citrate (E/Z Mixture)

CAS: 1795130-18-5
Formula: C₃₂H₃₅Cl₂NO₈
MW: 632.5 g/mol

VQ-025041

Reference Standard

2-Chloro NCT Impurity of Ritonavir

2-Chloro NCT Impurity of Ritonavir

CAS: 1072830-36-4
Formula: C₁₁H₇ClN₂O₅S
MW: 314.7 g/mol

VQ-035297

Reference Standard

2-Chloro Phenyloxy Descyclopropylamino Lenvatinib

2-Chloro Phenyloxy Descyclopropylamino Lenvatinib

Formula: C₂₄H₁₇Cl₂N₃O₅
MW: 498.31 g/mol

In stock

Reference Standard

2-Chloro-1-(2,3-dihydroxyphenyl)ethanone chemical structure

2-Chloro-1-(2,3-dihydroxyphenyl)ethanone

CAS: 63704-55-2
Formula: C₈H₇ClO₃
MW: 186.59 g/mol

VQ-031271

Reference Standard

2-Chloro-1-(2,4-dichlorophenyl)ethanol chemical structure

2-Chloro-1-(2,4-dichlorophenyl)ethanol

CAS: 13692-14-3
Formula: C₈H₇Cl₃O
MW: 225.5 g/mol

VQ-048709

Reference Standard

2-Chloro-1-(2,4-dihydroxyphenyl)ethanone chemical structure

2-Chloro-1-(2,4-dihydroxyphenyl)ethanone

CAS: 25015-92-3
Formula: C₈H₇ClO₃
MW: 186.59 g/mol

VQ-031270

Reference Standard

2-Chloro-1-(2,7-dichloro-9H-fluoren-4-yl)-ethanone (LF-2) chemical structure

2-Chloro-1-(2,7-dichloro-9H-fluoren-4-yl)-ethanone (LF-2)

CAS: 131023-37-5
Formula: C₁₅H₉Cl₃O
MW: 311.6 g/mol

VQ-026538

Reference Standard

2-Chloro-1-(2,7-dichloro-9H-fluoren-4-yl)ethan-1-ol chemical structure

2-Chloro-1-(2,7-dichloro-9H-fluoren-4-yl)ethan-1-ol

CAS: 1374644-82-2
Formula: C₁₅H₁₁Cl₃O
MW: 313.6 g/mol

VQ-026537

Reference Standard

2-Chloro-1-(3,4-difluorophenyl)ethanol chemical structure

2-Chloro-1-(3,4-difluorophenyl)ethanol

CAS: 51336-97-1
Formula: C₈H₇ClF₂O
MW: 192.59 g/mol

VQ-032795

Reference Standard

2-Chloro-1-(4-octylphenyl)ethanone chemical structure

2-Chloro-1-(4-octylphenyl)ethanone

CAS: 51326-38-6
Formula: C₁₆H₂₃ClO
MW: 266.8 g/mol

VQ-025792

Reference Standard

2-Chloro-1-(6-fluoro-3,4-dihydro-2H-chromen-2-yl)ethanone chemical structure

2-Chloro-1-(6-fluoro-3,4-dihydro-2H-chromen-2-yl)ethanone

CAS: 943126-72-5
Formula: C₁₁H₁₀ClFO₂
MW: 228.65 g/mol

VQ-032078

Reference Standard

2-Chloro-1-isocyanato-3-(trifluoromethyl)benzene chemical structure

2-Chloro-1-isocyanato-3-(trifluoromethyl)benzene

CAS: 88330-63-6
Formula: C₈H₃ClF₃NO
MW: 221.56 g/mol

VQ-032844

Reference Standard

2-Chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate chemical structure

2-Chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate

CAS: 249561-98-6
Formula: C₇H₁₄ClF₆N₂P
MW: 306.62 g/mol

VQ-025673

Reference Standard

2-Chloro-1,3-difluorobenzene chemical structure

2-Chloro-1,3-difluorobenzene

CAS: 38361-37-4
Formula: C₆H₃ClF₂
MW: 148.54 g/mol

VQ-044502

Reference Standard

2-Chloro-10-(3-chloropropyl)phenothiazine chemical structure

2-Chloro-10-(3-chloropropyl)phenothiazine

CAS: 2765-59-5
Formula: C₁₅H₁₃Cl₂NS
MW: 310.2 g/mol

VQ-027452

Reference Standard

2-Chloro-10H-phenothiazine 5-oxide chemical structure

2-Chloro-10H-phenothiazine 5-oxide

CAS: 1927-43-1
Formula: C₁₂H₈ClNOS
MW: 249.72 g/mol

VQ-022159

Reference Standard

2-Chloro-2-(phenylhydrazono)acetic Acid Ethyl Ester chemical structure

2-Chloro-2-(phenylhydrazono)acetic Acid Ethyl Ester

CAS: 28663-68-5
Formula: C₁₀H₁₁ClN₂O₂
MW: 226.66 g/mol

VQ-024327

Reference Standard

2-Chloro-2-bromoacetophenone chemical structure

2-Chloro-2-bromoacetophenone

CAS: 5000-66-8
Formula: C₈H₆BrClO
MW: 233.49 g/mol

VQ-032733

Reference Standard

2-Chloro-3-(3-(trifluoromethyl)phenyl)propanenitrile chemical structure

2-Chloro-3-(3-(trifluoromethyl)phenyl)propanenitrile

CAS: 27916-89-8
Formula: C₁₀H₇ClF₃N
MW: 233.62 g/mol

VQ-047790

Reference Standard

2-Chloro-3-iodobenzoic acid chemical structure

2-Chloro-3-iodobenzoic acid

CAS: 874817-93-3
Formula: C₇H₄ClIO₂
MW: 282.46 g/mol

VQ-048197

Reference Standard

2-Chloro-3,5-dinitrobenzoic acid chemical structure

2-Chloro-3,5-dinitrobenzoic acid

CAS: 2497-91-8
Formula: C₇H₃ClN₂O₆
MW: 246.56 g/mol

VQ-032521

Reference Standard

2-Chloro-4-(1H-Pyrazol-5-Yl)Benzonitrile chemical structure

2-Chloro-4-(1H-Pyrazol-5-Yl)Benzonitrile

CAS: 1297537-37-1
Formula: C₁₀H₆ClN₃
MW: 203.63 g/mol

VQ-022313

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