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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

Kanamycin B chemical structure

CAS: 4696-76-8
Formula: C₁₈H₃₇N₅O₁₀
MW: 483.5 g/mol

VQ-022898

Reference Standard

Kanosamine Hydrochloride chemical structure

Kanosamine Hydrochloride

CAS: 57649-10-2
Formula: C₆H₁₄ClNO₅
MW: 215.63 g/mol

VQ-048738

Reference Standard

Kathon 886 chemical structure

CAS: 55965-84-9
Formula: C₈H₉ClN₂O₂S₂
MW: 264.8 g/mol

VQ-039207

Reference Standard

Keto Bisoprolol Hydrochloride chemical structure

Keto Bisoprolol Hydrochloride

CAS: 1346603-26-6
Formula: C₁₈H₃₀ClNO₅
MW: 375.9 g/mol

VQ-047594

Reference Standard

Keto Diclofenac Sodium Salt chemical structure

Keto Diclofenac Sodium Salt

CAS: 70757-34-5
Formula: C₁₄H₈Cl₂NNaO₃
MW: 332.1 g/mol

VQ-036673

Reference Standard

Keto Lovastatin chemical structure

Keto Lovastatin

CAS: 96497-73-3
Formula: C₂₄H₃₄O₆
MW: 418.5 g/mol

VQ-038164

Reference Standard

Keto Ziprasidone chemical structure

Keto Ziprasidone

CAS: 884305-07-1
Formula: C₂₁H₁₉ClN₄O₂S
MW: 426.9 g/mol

VQ-043006

Reference Standard

Ketoconazole Hydroxymethyl Impurity chemical structure

Ketoconazole Hydroxymethyl Impurity

CAS: 170210-42-1
Formula: C₁₄H₁₄Cl₂N₂O₃
MW: 329.2 g/mol

VQ-031370

Reference Standard

Ketoconazole Impurity 21 chemical structure

Ketoconazole Impurity 21

CAS: 98207-06-8
Formula: C₂₃H₂₅BrCl₂N₂O₄
MW: 544.3 g/mol

VQ-048743

Reference Standard

Ketoconazole Impurity 25 chemical structure

Ketoconazole Impurity 25

CAS: 1253852-50-4
Formula: C₂₄H₂₆Cl₂N₄O₄
MW: 505.4 g/mol

VQ-026292

Reference Standard

Ketoconazole impurity 6

Ketoconazole impurity 6

CAS: 497250-93-8
Formula: C₁₁H₁₀BrCl₃O₂
MW: 360.5 g/mol

VQ-048746

Reference Standard

Ketoprofen 1,4-Sorbitan Ester chemical structure

Ketoprofen 1,4-Sorbitan Ester

CAS: 2468180-02-9
Formula: C₂₂H₂₄O₇
MW: 400.4 g/mol

VQ-037810

Reference Standard

Ketoprofen 2-Ethylhexyl Ester chemical structure

Ketoprofen 2-Ethylhexyl Ester

CAS: 2731997-93-4
Formula: C₂₄H₃₀O₃
MW: 366.5 g/mol

VQ-043732

Reference Standard

Ketoprofen Cyano-Methyl Butyrate Impurity chemical structure

Ketoprofen Cyano-Methyl Butyrate Impurity

CAS: 24131-07-5
Formula: C₁₂H₁₃NO₂
MW: 203.24 g/mol

VQ-034437

Reference Standard

Ketoprofen Ethyl Ester chemical structure

Ketoprofen Ethyl Ester

CAS: 60658-04-0
Formula: C₁₈H₁₈O₃
MW: 282.3 g/mol

VQ-026302

Reference Standard

Ketoprofen isopropyl ester chemical structure

Ketoprofen isopropyl ester

CAS: 220662-26-0
Formula: C₁₉H₂₀O₃
MW: 296.4 g/mol

VQ-026307

Reference Standard

Ketoprofen lysine chemical structure

Ketoprofen lysine

CAS: 57469-78-0
Formula: C₂₂H₂₈N₂O₅
MW: 400.5 g/mol

VQ-026306

Reference Standard

Ketoprofen Methyl Ester chemical structure

Ketoprofen Methyl Ester

CAS: 47087-07-0
Formula: C₁₇H₁₆O₃
MW: 268.31 g/mol

VQ-031380

Reference Standard

Ketoprofen Tromethamine Amide chemical structure

Ketoprofen Tromethamine Amide

CAS: 1777829-91-0
Formula: C₂₀H₂₃NO₅
MW: 357.4 g/mol

VQ-031378

Reference Standard

Ketoprofen Tromethamine Amide (R-Isomer) chemical structure

Ketoprofen Tromethamine Amide (R-Isomer)

CAS: 1777830-06-4
Formula: C₂₀H₂₃NO₅
MW: 357.4 g/mol

VQ-037815

Reference Standard

Ketorolac 1-Keto Analog chemical structure

Ketorolac 1-Keto Analog

CAS: 2518343-81-0
Formula: C₁₄H₁₁NO₂
MW: 225.24 g/mol

VQ-031386

Reference Standard

Ketorolac 2-Benzoylpyrrole Impurity chemical structure

Ketorolac 2-Benzoylpyrrole Impurity

CAS: 7697-46-3
Formula: C₁₁H₉NO
MW: 171.19 g/mol

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Reference Standard

Ketotifen Impurity 14 chemical structure

Ketotifen Impurity 14

CAS: 34580-10-4
Formula: C₁₃H₈Br₂OS
MW: 372.08 g/mol

VQ-037824

Reference Standard

Ketotriclabendazole chemical structure

Ketotriclabendazole

CAS: 1201920-88-8
Formula: C₁₃H₇Cl₃N₂O₂
MW: 329.6 g/mol

VQ-042673

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