Impurity Reference Standards

API Impurities

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

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p-Isobutylstyrene

CAS: 63444-56-4
Formula: C₁₂H₁₆
MW: 160.25 g/mol

ZX-029877

p-Methoxybenzoyl chloride

CAS: 100-07-2
Formula: C₈H₇ClO₂
MW: 170.59 g/mol

ZX-033347

p-Toluenesulfinic Acid Methyl Ester

CAS: 672-78-6
Formula: C₈H₁₀O₂S
MW: 170.23 g/mol

ZX-043356

P1, P5-Di(Uridine-5')-Pentaphosphate

CAS: 211448-70-3
Formula: C₁₈H₂₇N₄O₂₆P₅
MW: 870.3 g/mol

ZX-024315

Paclitaxel Oxetane Ring-Opened 3-Acetyl 4-Benzoyl Impurity

CAS: 932042-85-8
Formula: C₄₇H₅₃NO₁₅
MW: 871.9 g/mol

ZX-026272

Paclitaxel Side Chain Impurity

CAS: 132201-33-3
Formula: C₁₆H₁₅NO₄
MW: 285.29 g/mol

ZX-035921

Palbociclib 2-Hydroxy Acetyl Impurity

CAS: 2172256-78-7
Formula: C₁₅H₁₇N₃O₃
MW: 287.31 g/mol

ZX-005064

Palbociclib 2-Hydroxy Bromo Impurity

CAS: 1922954-32-2
Formula: C₁₃H₁₄BrN₃O₂
MW: 324.17 g/mol

ZX-005065

Palbociclib Chlorobromo Impurity

CAS: 1016636-76-2
Formula: C₁₃H₁₃BrClN₃O
MW: 342.62 g/mol

ZX-005066

Palbociclib Impurity 11

CAS: 866084-31-3
Formula: C₃₃H₄₅N₇O₄
MW: 603.8 g/mol

ZX-005067

Palbociclib Impurity 16

CAS: 571189-64-5
Formula: C₁₅H₁₈N₄O₂
MW: 286.33 g/mol

ZX-005068

Palbociclib Impurity 4

CAS: 2363172-64-7
Formula: C₂₀H₂₂N₆O₂
MW: 378.4 g/mol

ZX-005069

Palbociclib Impurity 48

CAS: 1013916-37-4
Formula: C₁₃H₁₄ClN₃O
MW: 263.72 g/mol

ZX-005070

Palbociclib Impurity 9

CAS: 2204368-66-9
Formula: C₂₄H₂₉N₇O₂
MW: 447.5 g/mol

ZX-005071

Palbociclib Impurity A

CAS: 1082876-26-3
Formula: C₉H₁₄N₄
MW: 178.23 g/mol

ZX-005072

Palbociclib Impurity A (Hydrochloride)

CAS: 1956322-95-4
Formula: C₉H₁₅ClN₄
MW: 214.69 g/mol

ZX-005073

Palbociclib Impurity C

CAS: 2624141-94-0
Formula: C₂₅H₃₁N₇O₂
MW: 461.6 g/mol

ZX-005074

Palbociclib Impurity D

CAS: 850918-83-1
Formula: C₂₂H₂₈BrCl₂N₇O
MW: 557.3 g/mol

ZX-005075

Palbociclib Impurity F

CAS: 1023594-49-1
Formula: C₁₄H₂₂N₄O₂
MW: 278.35 g/mol

ZX-005076

Palbociclib Impurity-16 (Stage-I)(Bromo)

CAS: 1637781-10-2
Formula: C₁₃H₁₅BrN₄O
MW: 323.19 g/mol

ZX-005077

Palbociclib N-Acetic Acid

CAS: 2363160-84-1
Formula: C₂₂H₂₄N₆O₄
MW: 436.5 g/mol

ZX-031711

Palbociclib N-Formyl Impurity

CAS: 2174002-16-3
Formula: C₂₅H₂₉N₇O₃
MW: 475.5 g/mol

ZX-005078

Palbociclib Vinyl Boc Impurity

CAS: 1941177-45-2
Formula: C₂₉H₃₇N₇O₃
MW: 531.6 g/mol

ZX-005079

Palbociclib-2,6-bis-aminopyridine impurity

CAS: 2458234-37-0
Formula: C₃₁H₃₉N₁₁O
MW: 581.7 g/mol

ZX-026278

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