Impurity Reference Standards

API Impurities

Process impurities, isomers, degradants and related compounds for thousands of APIs, characterised for method development, validation and QC release.

9,055 products1,019 in stockCOA + SDS with every lot

9,055 products · page 20 of 378

Grid List

(E)-2-(1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-5-(phenyldiazenyl)pyrimidine-4,6-diamine

CAS: 370879-49-5
Formula: C₂₃H₁₈FN₉
MW: 439.4 g/mol

ZX-036117

(E)-2-(2-Aminoethyl)but-2-enoic Acid Hydrochloride

CAS: 1379403-11-8
Formula: C₆H₁₂ClNO₂
MW: 165.62 g/mol

ZX-023017

(E)-2-Cyano-3-morpholinoacrylamide

CAS: 159832-22-1
Formula: C₈H₁₁N₃O₂
MW: 181.19 g/mol

ZX-031387

(E)-2,2,14,14-Tetramethylpentadec-7-enedioic acid

CAS: 2127387-94-2
Formula: C₁₉H₃₄O₄
MW: 326.5 g/mol

ZX-023513

(E)-2,6,8-Trimethylnon-5-en-4-one

CAS: 61285-69-6
Formula: C₁₂H₂₂O
MW: 182.3 g/mol

ZX-028702

(E)-2'-Deschloro Luliconazole

CAS: 187164-18-7
Formula: C₁₄H₁₀ClN₃S₂
MW: 319.8 g/mol

ZX-030397

(E)-3-(3-(Trifluoromethyl)phenyl)acrylic Acid

CAS: 67801-07-4
Formula: C₁₀H₇F₃O₂
MW: 216.16 g/mol

ZX-028626

(E)-3-(4-((2-Chloropyrimidin-4-yl)amino)-3,5-dimethylphenyl)acrylonitrile

CAS: 1538550-43-4
Formula: C₁₅H₁₃ClN₄
MW: 284.74 g/mol

ZX-032193

(E)-3-(4-Amino-3,5-dimethylphenyl)acrylonitrile Hydrochloride

CAS: 661489-23-2
Formula: C₁₁H₁₃ClN₂
MW: 208.69 g/mol

ZX-026726

(E)-3-(5-Nitrofuran-2-yl)acrylaldehyde

CAS: 52661-56-0
Formula: C₇H₅NO₄
MW: 167.12 g/mol

ZX-025860

(E)-3-Cyclopentylacrylic acid

CAS: 117929-79-0
Formula: C₈H₁₂O₂
MW: 140.18 g/mol

ZX-035517

(E)-3-O-Methyl Entacapone

CAS: 857629-78-8
Formula: C₁₅H₁₇N₃O₅
MW: 319.31 g/mol

ZX-021557

(E)-3,5-Dimethyl-3-heptene

CAS: 59643-68-4
Formula: C₉H₁₈
MW: 126.24 g/mol

ZX-045306

(E)-4-((4-((4-(2-Cyanovinyl)-2,6-dimethylphenyl)amino)pyrimidin-2-yl)amino)benzamide

CAS: 1446439-51-5
Formula: C₂₂H₂₀N₆O
MW: 384.4 g/mol

ZX-026727

(E)-4-(1-(((4-Cyclohexyl-3-(trifluoromethyl)benzyl)oxy)imino) ethyl)-2-ethylbenzaldehyde

CAS: 1230487-01-0
Formula: C₂₅H₂₈F₃NO₂
MW: 431.5 g/mol

ZX-026949

(E)-4-(1-Benzyl-2-methyl-1H-imidazol-5-yl)-3-(ethoxycarbonyl)but-3-enoic Acid

CAS: 1640981-02-7
Formula: C₁₈H₂₀N₂O₄
MW: 328.4 g/mol

ZX-027124

(E)-4-(2-(2,5-Dioxopyrrolidin-1-yl)ethoxy)-4-oxobut-2-enoic acid

CAS: 2101811-41-8
Formula: C₁₀H₁₁NO₆
MW: 241.2 g/mol

ZX-024317

(E)-4-(2,4-Difluorobenzoyl)piperidine Oxime

CAS: 691007-07-5
Formula: C₁₂H₁₄F₂N₂O
MW: 240.25 g/mol

ZX-032219

(E)-4-Ethoxy-3-(pyridin-4-yl)but-3-en-2-one

CAS: 88349-61-5
Formula: C₁₁H₁₃NO₂
MW: 191.23 g/mol

ZX-025635

(E)-4-Ethylhepta-2,6-dienoic acid

CAS: 1127302-18-4
Formula: C₉H₁₄O₂
MW: 154.21 g/mol

ZX-030654

(E)-5-(2-Bromovinyl)Pyrimidine-2,4(1H,3H)-dione

CAS: 69304-49-0
Formula: C₆H₅BrN₂O₂
MW: 217.02 g/mol

ZX-023644

(E)-5-(3-(Dimethylamino)propylidene)-10,11-dihydro-5H-dibenzo[a,d][7]annulen-10-ol

CAS: 64520-05-4
Formula: C₂₀H₂₃NO
MW: 293.4 g/mol

ZX-027982

(E)-6-Iodo-3-[2-(pyridin-2-yl)ethenyl]-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole

CAS: 886230-77-9
Formula: C₁₉H₁₈IN₃O
MW: 431.3 g/mol

ZX-020734

(E)-6,6-Dimethyl-2-hepten-4-ynal

CAS: 138139-82-9
Formula: C₉H₁₂O
MW: 136.19 g/mol

ZX-027178

Have a list of compounds to price?

Paste up to 200 CAS numbers into Bulk CAS lookup, or send one enquiry for everything in your quote list. We reply with price, lead time and documents.

Bulk CAS lookup Open quote list