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Impurity Reference Standards

Pharmacopoeial impurities, nitrosamines, metabolites, labelled internal standards and API working standards, each backed by analytical data for method development and QC.

20,060 products6 categories2,050 in stockCOA + SDS with every lot

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Cyproterone Acetate Dichloro 17-Hydroxy Impurity

CAS: 2271091-83-7
Formula: C₂₂H₂₈Cl₂O₃
MW: 411.4 g/mol

ZX-024104

Cyproterone Acetate EP Impurity A

CAS: 2701-50-0
Formula: C₂₄H₃₀O₄
MW: 382.5 g/mol

ZX-021316

Cyproterone Acetate EP Impurity C

CAS: 17183-98-1
Formula: C₂₄H₃₀Cl₂O₄
MW: 453.4 g/mol

ZX-021315

Cyproterone Acetate EP Impurity E

CAS: 17184-05-3
Formula: C₂₄H₃₀O₅
MW: 398.5 g/mol

ZX-021313

Cyproterone Acetate EP Impurity F

CAS: 2098-66-0
Formula: C₂₂H₂₇ClO₃
MW: 374.9 g/mol

ZX-021312

Cyproterone Acetate EP Impurity G

CAS: 23814-84-8
Formula: C₂₄H₃₁ClO₅
MW: 435 g/mol

ZX-021314

Cyproterone Acetate EP Impurity H

CAS: 2668-74-8
Formula: C₂₃H₃₀O₄
MW: 370.5 g/mol

ZX-021317

Cyproterone Acetate EP Impurity I

CAS: 13698-49-2
Formula: C₂₃H₂₇ClO₄
MW: 402.9 g/mol

ZX-020253

Cyproterone Acetate EP Impurity J

CAS: 15423-97-9
Formula: C₂₄H₃₀O₅
MW: 398.5 g/mol

ZX-027777

Cyromazine D4

CAS: 1219804-19-9
Formula: C₆H₁₀N₆
MW: 170.21 g/mol

ZX-043219

Cysteamine

CAS: 60-23-1
Formula: C₂H₇NS
MW: 77.15 g/mol

ZX-024105

Cysteamine bitartrate

CAS: 27761-19-9
Formula: C₆H₁₃NO₆S
MW: 227.24 g/mol

ZX-028775

Cysteamine Impurity 2

CAS: 51859-63-3
Formula: C₄H₉NOS
MW: 119.19 g/mol

ZX-004546

Cysteine

CAS: 52-90-4
Formula: C₃H₇NO₂S
MW: 121.16 g/mol

ZX-006477

Cysteine Hydrochloride Monohydrate

CAS: 7048-04-6
Formula: C₃H₁₀ClNO₃S
MW: 175.64 g/mol

ZX-006478

Cytarabine

CAS: 147-94-4
Formula: C₉H₁₃N₃O₅
MW: 243.22 g/mol

ZX-021318

Cytarabine EP Impurity A

CAS: 3083-77-0
Formula: C₉H₁₂N₂O₆
MW: 244.2 g/mol

ZX-022968

Cytarabine EP Impurity F

CAS: 32830-01-6
Formula: C₉H₁₁N₃O₄
MW: 225.2 g/mol

ZX-021319

Cytarabine EP Impurity G

CAS: 2140-61-6
Formula: C₁₀H₁₅N₃O₅
MW: 257.24 g/mol

ZX-021320

Cytarabine EP Impurity H

CAS: 31698-14-3
Formula: C₉H₁₁N₃O₄
MW: 225.2 g/mol

ZX-028777

Cytarabine EP Impurity I

CAS: 6829-31-8
Formula: C₁₀H₁₅N₃O₅
MW: 257.24 g/mol

ZX-021321

Cytidine Diphosphate Ethanolamine

CAS: 3036-18-8
Formula: C₁₁H₂₀N₄O₁₁P₂
MW: 446.24 g/mol

ZX-028778

Cytidine, 5'-deoxy-5-fluoro-N,N-bis[(pentyloxy)carbonyl]-, 2',3'-diacetate

CAS: 1313238-38-8
Formula: C₂₅H₃₆FN₃O₁₀
MW: 557.6 g/mol

ZX-023738

D 517 Hydrochloride

CAS: 1794-55-4
Formula: C₂₆H₃₇ClN₂O₄
MW: 477 g/mol

ZX-032751

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