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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

Avanafil Impurity 9 chemical structure

Avanafil Impurity 9

CAS: 1452128-53-8
Formula: C₁₈H₁₇ClN₆O₃
MW: 400.8 g/mol

VQ-043058

Reference Standard

Avanafil N-ethyl Analog chemical structure

Avanafil N-ethyl Analog

CAS: 2520114-39-8
Formula: C₂₀H₂₆ClN₅O₃
MW: 419.9 g/mol

VQ-043056

Reference Standard

Avanafil N-Methyl Analog chemical structure

Avanafil N-Methyl Analog

CAS: 372117-53-8
Formula: C₁₉H₂₄ClN₅O₃
MW: 405.9 g/mol

VQ-043055

Reference Standard

Avapritinib Alcohol Impurity (R)-Isomer

Avapritinib Alcohol Impurity (R)-Isomer

CAS: 1703793-18-3
Formula: C₂₅H₂₄FN₉O
MW: 485.53 g/mol

VQ-024440

Reference Standard

Avapritinib Desamino Methyl Impurity

Avapritinib Desamino Methyl Impurity

CAS: 1703793-31-0
Formula: C₂₆H₂₇FN₁₀
MW: 498.57 g/mol

VQ-024439

Reference Standard

Avapritinib Impurity 9 chemical structure

Avapritinib Impurity 9

CAS: 1704496-81-0
Formula: C₁₇H₂₁FN₄
MW: 300.37 g/mol

VQ-047491

Reference Standard

Avatrombopag Bromo acid Impurity chemical structure

Avatrombopag Bromo acid Impurity

CAS: 2883585-26-8
Formula: C₂₉H₃₃BrCl₂N₆O₃S₂
MW: 728.6 g/mol

VQ-029295

Reference Standard

Avatrombopag Diamide Impurity chemical structure

Avatrombopag Diamide Impurity

CAS: 2948773-23-5
Formula: C₄₆H₅₅Cl₃N₁₀O₂S₄
MW: 1014.6 g/mol

VQ-035867

Reference Standard

Avatrombopag Ester Impurity chemical structure

Avatrombopag Ester Impurity

CAS: 570403-14-4
Formula: C₃₁H₃₈Cl₂N₆O₃S₂
MW: 677.7 g/mol

VQ-024446

Reference Standard

Avatrombopag Impurity 12 chemical structure

Avatrombopag Impurity 12

CAS: 570407-42-0
Formula: C₁₇H₂₃ClN₄S₂
MW: 383 g/mol

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Reference Standard

Avatrombopag Methyl Ester Impurity chemical structure

Avatrombopag Methyl Ester Impurity

CAS: 2489330-90-5
Formula: C₃₀H₃₆Cl₂N₆O₃S₂
MW: 663.7 g/mol

VQ-045109

Reference Standard

Avermectin A1a chemical structure

CAS: 65195-51-9
Formula: C₄₉H₇₄O₁₄
MW: 887.1 g/mol

VQ-029301

Reference Standard

Avermectin B1a Monosaccharide chemical structure

Avermectin B1a Monosaccharide

CAS: 71831-09-9
Formula: C₄₁H₆₀O₁₁
MW: 728.9 g/mol

VQ-031346

Reference Standard

Avibactam Azabicyclo Ester Impurity chemical structure

Avibactam Azabicyclo Ester Impurity

CAS: 1416134-63-8
Formula: C₁₆H₂₀N₂O₄
MW: 304.34 g/mol

VQ-029308

Reference Standard

Avibactam Enantiomer (Sodium salt) chemical structure

Avibactam Enantiomer (Sodium salt)

CAS: 1383814-68-3
Formula: C₇H₁₀N₃NaO₆S
MW: 287.23 g/mol

VQ-024450

Reference Standard

Axitinib Acid chemical structure

CAS: 319462-34-5
Formula: C₂₁H₁₅N₃O₂S
MW: 373.4 g/mol

VQ-029311

Reference Standard

Axitinib Amide chemical structure

CAS: 319462-41-4
Formula: C₂₁H₁₆N₄OS
MW: 372.4 g/mol

VQ-043062

Reference Standard

Axitinib Asymmetric Dimer Impurity-1 chemical structure

Axitinib Asymmetric Dimer Impurity-1

CAS: 1428728-84-0
Formula: C₄₄H₃₆N₈O₂S₂
MW: 772.9 g/mol

VQ-004462

Reference Standard

Axitinib Des Iodo analog chemical structure

Axitinib Des Iodo analog

CAS: 2242852-05-5
Formula: C₁₉H₁₉N₃O
MW: 305.4 g/mol

VQ-021690

Reference Standard

Axitinib Dimer Impurity 2 chemical structure

Axitinib Dimer Impurity 2

CAS: 1428728-83-9
Formula: C₄₄H₃₆N₈O₂S₂
MW: 772.9 g/mol

In stock

Reference Standard

Axitinib Impurity H chemical structure

Axitinib Impurity H

CAS: 1639137-80-6
Formula: C₂₄H₂₀N₄O₂S
MW: 428.5 g/mol

VQ-024460

Reference Standard

Axitinib Sulfonyl Impurity chemical structure

Axitinib Sulfonyl Impurity

CAS: 1348536-59-3
Formula: C₂₂H₁₈N₄O₃S
MW: 418.5 g/mol

VQ-021688

Reference Standard

Axitinib Tetrahydro-2H-pyran chemical structure

Axitinib Tetrahydro-2H-pyran

CAS: 885126-35-2
Formula: C₂₇H₂₆N₄O₂S
MW: 470.6 g/mol

VQ-024459

Reference Standard

Axitinib Thio Impurity chemical structure

Axitinib Thio Impurity

CAS: 20054-45-9
Formula: C₈H₉NOS
MW: 167.23 g/mol

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