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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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Reference Standard

Bis(ethylpyridyl) Pioglitazone Analog chemical structure

Bis(ethylpyridyl) Pioglitazone Analog

CAS: 1147527-36-3
Formula: C₂₈H₂₉N₃O₃S
MW: 487.6 g/mol

VQ-041498

Reference Standard

Bis(tert-butoxycarbonyl) lisdexamphetamine chemical structure

Bis(tert-butoxycarbonyl) lisdexamphetamine

CAS: 819871-13-1
Formula: C₂₅H₄₁N₃O₅
MW: 463.6 g/mol

VQ-026492

Reference Standard

Bis(thiazol-5-ylmethyl)carbonate chemical structure

Bis(thiazol-5-ylmethyl)carbonate

CAS: 1370406-84-0
Formula: C₉H₈N₂O₃S₂
MW: 256.3 g/mol

VQ-029918

Reference Standard

Bisabolol Oxide A chemical structure

Bisabolol Oxide A

CAS: 22567-36-8
Formula: C₁₅H₂₆O₂
MW: 238.37 g/mol

VQ-027081

Reference Standard

Bisabolol oxide B chemical structure

Bisabolol oxide B

CAS: 55399-12-7
Formula: C₁₅H₂₆O₂
MW: 238.37 g/mol

VQ-035983

Reference Standard

Bisbentiamine chemical structure

CAS: 2667-89-2
Formula: C₃₈H₄₂N₈O₆S₂
MW: 770.9 g/mol

VQ-028331

Reference Standard

Bisdemethoxycurcumin chemical structure

Bisdemethoxycurcumin

CAS: 33171-05-0
Formula: C₁₉H₁₆O₄
MW: 308.3 g/mol

VQ-029941

Reference Standard

Bisdisulizole Disodium chemical structure

Bisdisulizole Disodium

CAS: 180898-37-7
Formula: C₂₀H₁₂N₄Na₂O₁₂S₄
MW: 674.6 g/mol

VQ-036999

Reference Standard

Bisoprolol Dimer chemical structure

Bisoprolol Dimer

CAS: 2775292-22-1
Formula: C₃₃H₅₃NO₈
MW: 591.8 g/mol

VQ-029452

Reference Standard

Bisoprolol Epoxide Impurity chemical structure

Bisoprolol Epoxide Impurity

CAS: 66722-57-4
Formula: C₁₅H₂₂O₄
MW: 266.33 g/mol

VQ-021855

Reference Standard

Bisoprolol Hydroxyethyl Ester Impurity chemical structure

Bisoprolol Hydroxyethyl Ester Impurity

CAS: 1346601-19-1
Formula: C₁₅H₂₃NO₅
MW: 297.35 g/mol

VQ-021859

Reference Standard

Bisoprolol Hydroxymethyl Oxiran Impurity chemical structure

Bisoprolol Hydroxymethyl Oxiran Impurity

CAS: 4204-78-8
Formula: C₁₀H₁₂O₃
MW: 180.2 g/mol

VQ-024607

Reference Standard

Bisoprolol Impurity 10 chemical structure

Bisoprolol Impurity 10

CAS: 2469273-10-5
Formula: C₁₄H₂₃NO₃
MW: 253.34 g/mol

VQ-029457

Reference Standard

Bisoprolol Impurity 22

Bisoprolol Impurity 22

CAS: 133155-34-7
Formula: C₁₃H₁₈O₄
MW: 238.28 g/mol

VQ-035989

Reference Standard

Bisoprolol Impurity 9 chemical structure

Bisoprolol Impurity 9

CAS: 59383-52-7
Formula: C₁₅H₂₅NO₃
MW: 267.36 g/mol

VQ-029456

Reference Standard

Bisoprolol Phenol Hydrochloride Impurity chemical structure

Bisoprolol Phenol Hydrochloride Impurity

CAS: 2829-84-7
Formula: C₁₂H₂₀ClNO₃
MW: 261.74 g/mol

VQ-047598

Reference Standard

Bisoprolol Phenol Impurity chemical structure

Bisoprolol Phenol Impurity

CAS: 62340-37-8
Formula: C₁₂H₁₉NO₃
MW: 225.28 g/mol

VQ-029458

Reference Standard

Bisphenol A (2,3-dihydroxypropyl) Glycidyl Ether chemical structure

Bisphenol A (2,3-dihydroxypropyl) Glycidyl Ether

CAS: 76002-91-0
Formula: C₂₁H₂₆O₅
MW: 358.4 g/mol

VQ-039770

Reference Standard

Bisphenol F Bis(2,3-dihydroxypropyl) Ether chemical structure

Bisphenol F Bis(2,3-dihydroxypropyl) Ether

CAS: 72406-26-9
Formula: C₁₉H₂₄O₆
MW: 348.4 g/mol

VQ-041008

Reference Standard

Bisphenol F Diglycidyl Ether chemical structure

Bisphenol F Diglycidyl Ether

CAS: 2095-03-6
Formula: C₁₉H₂₀O₄
MW: 312.4 g/mol

VQ-029455

Reference Standard

Bispyridoxine chemical structure

CAS: 19203-56-6
Formula: C₁₆H₂₀N₂O₅
MW: 320.34 g/mol

VQ-033392

Reference Standard

Bisthiophenyl tetrahydrofuran chemical structure

Bisthiophenyl tetrahydrofuran

CAS: 1253297-73-2
Formula: C₁₄H₁₆OS₂
MW: 264.4 g/mol

VQ-028345

Reference Standard

Bivalirudin D-Asn Impurity

Bivalirudin D-Asn Impurity

CAS: 1310025-28-5
Formula: C₉₈H₁₃₈N₂₄O₃₃
MW: 2180.32 g/mol

VQ-035992

Reference Standard

Bleomycin A2 Chloride chemical structure

Bleomycin A2 Chloride

CAS: 49830-49-1
Formula: C₅₅H₈₄ClN₁₇O₂₁S₃
MW: 1451 g/mol

VQ-035993

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