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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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1,516in stock

COA + SDSwith every lot

Reference Standard

Osimertinib Dimer Impurity 3

Osimertinib Dimer Impurity 3

Formula: C₅₆H₆₆N₁₄O₄
MW: 999.24 g/mol

VQ-005443

Reference Standard

Osimertinib Hydroxy Impurity

Osimertinib Hydroxy Impurity

Formula: C₂₈H₃₅N₇O₃
MW: 517.62 g/mol

In stock

Reference Standard

Osimertinib Impurity 1

Osimertinib Impurity 1

CAS: 360062-41-5
Formula: C₂₀H₁₄N₄
MW: 310.35 g/mol

VQ-049361

Reference Standard

Osimertinib Impurity 14 chemical structure

Osimertinib Impurity 14

CAS: 2364486-23-5
Formula: C₁₃H₁₀ClN₃
MW: 243.69 g/mol

In stock

Reference Standard

Osimertinib Impurity 22 chemical structure

Osimertinib Impurity 22

CAS: 3025819-85-3
Formula: C₉H₆F₄N₂O₄
MW: 282.15 g/mol

VQ-049360

Reference Standard

Osimertinib Impurity G chemical structure

Osimertinib Impurity G

CAS: 2044702-39-6
Formula: C₂₅H₂₆N₆O₂
MW: 442.5 g/mol

In stock

Reference Standard

Osimertinib Impurity G (Pre Final) chemical structure

Osimertinib Impurity G (Pre Final)

CAS: 1801616-92-1
Formula: C₂₂H₂₄N₆O
MW: 388.5 g/mol

In stock

Reference Standard

Osimertinib Impurity N chemical structure

Osimertinib Impurity N

CAS: 1932710-29-6
Formula: C₃₁H₃₅N₇O₃
MW: 553.7 g/mol

VQ-027059

Reference Standard

Osimertinib Methoxy Impurity

Osimertinib Methoxy Impurity

Formula: C₂₉H₃₇N₇O₃
MW: 531.65 g/mol

In stock

Reference Standard

Osimertinib Methoxy Impurity

Osimertinib Methoxy Impurity

CAS: 3050754-62-3
Formula: C₂₉H₃₇N₇O₃
MW: 531.65 g/mol

VQ-032306

Reference Standard

Osimertinib N-Methylacrylamide Impurity chemical structure

Osimertinib N-Methylacrylamide Impurity

CAS: 2850389-35-2
Formula: C₃₀H₃₃N₇O₃
MW: 539.6 g/mol

VQ-027057

Reference Standard

Osimertinib N'-Oxide Impurity chemical structure

Osimertinib N'-Oxide Impurity

CAS: 1975982-94-5
Formula: C₂₈H₃₃N₇O₃
MW: 515.6 g/mol

In stock

Reference Standard

Ospemifene Dichloro Impurity chemical structure

Ospemifene Dichloro Impurity

CAS: 211372-71-3
Formula: C₁₈H₁₈Cl₂
MW: 305.2 g/mol

VQ-038817

Reference Standard

Ospemifene E-Isomer Impurity chemical structure

Ospemifene E-Isomer Impurity

CAS: 238089-02-6
Formula: C₂₄H₂₃ClO₂
MW: 378.9 g/mol

VQ-005450

Reference Standard

Ospemifene Ethyl Ester Impurity

Ospemifene Ethyl Ester Impurity

CAS: 341527-08-0
Formula: C₂₆H₂₅ClO₃
MW: 420.93 g/mol

VQ-044997

Reference Standard

Oteseconazole Epoxide Impurity chemical structure

Oteseconazole Epoxide Impurity

CAS: 294182-28-8
Formula: C₁₄H₈BrF₄NO
MW: 362.12 g/mol

VQ-045483

Reference Standard

Otilonium Bromide Impurity 14 Bromide chemical structure

Otilonium Bromide Impurity 14 Bromide

CAS: 26187-16-6
Formula: C₃₀H₄₅BrN₂O₄
MW: 577.6 g/mol

VQ-041251

Reference Standard

Otilonium Bromide Impurity 3 chemical structure

Otilonium Bromide Impurity 3

CAS: 14629-01-7
Formula: C₁₄H₂₃BrN₂O₂
MW: 331.25 g/mol

VQ-027320

Reference Standard

Ouratea proanthocyanidin A chemical structure

Ouratea proanthocyanidin A

CAS: 274678-42-1
Formula: C₃₁H₂₈O₁₂
MW: 592.5 g/mol

VQ-039775

Reference Standard

Oxacillin Impurity G chemical structure

Oxacillin Impurity G

CAS: 724695-30-1
Formula: C₁₉H₁₈ClN₃O₅S
MW: 435.9 g/mol

VQ-032990

Reference Standard

Oxacyclohexane Open Ring Tacrolimus chemical structure

Oxacyclohexane Open Ring Tacrolimus

CAS: 144432-23-5
Formula: C₄₄H₇₁NO₁₃
MW: 822 g/mol

VQ-028173

Reference Standard

Oxaliplatin Related Compound B chemical structure

Oxaliplatin Related Compound B

CAS: 66900-68-3
Formula: C₆H₁₄N₄O₆Pt
MW: 433.28 g/mol

VQ-032993

Reference Standard

Oxaliplatin Related Compound D

Oxaliplatin Related Compound D

CAS: 61758-77-8
Formula: C₈H₁₄N₂O₄Pt
MW: 397.29 g/mol

VQ-041255

Reference Standard

Oxaliplatin Related Compound F chemical structure

Oxaliplatin Related Compound F

CAS: 66845-32-7
Formula: C₆H₁₂I₂N₂Pt
MW: 561.07 g/mol

VQ-041257

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