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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Kaempferol-3-O-glucoside chemical structure

Kaempferol-3-O-glucoside

CAS: 480-10-4
Formula: C₂₁H₂₀O₁₁
MW: 448.4 g/mol

VQ-035805

Reference Standard

Kanamycin A chemical structure

CAS: 59-01-8
Formula: C₁₈H₃₆N₄O₁₁
MW: 484.5 g/mol

VQ-022899

Reference Standard

Kanamycin B chemical structure

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

VQ-022898

Reference Standard

Kanamycin C chemical structure

CAS: 2280-32-2
Formula: C₁₈H₃₆N₄O₁₁
MW: 484.5 g/mol

VQ-048739

Reference Standard

Kanamycin sulfate hydrate chemical structure

Kanamycin sulfate hydrate

CAS: 5965-95-7
Formula: C₁₈H₄₀N₄O₁₆S
MW: 600.6 g/mol

VQ-037800

Reference Standard

Kanosamine Hydrochloride chemical structure

Kanosamine Hydrochloride

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

VQ-048738

Reference Standard

Karanjin chemical structure

CAS: 521-88-0
Formula: C₁₈H₁₂O₄
MW: 292.3 g/mol

VQ-037801

Reference Standard

Kathon 886 chemical structure

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

VQ-039207

Reference Standard

Ketamine Hydrochloride EP Impurity A chemical structure

Ketamine Hydrochloride EP Impurity A

CAS: 6740-87-0
Formula: C₁₃H₁₆ClNO
MW: 237.72 g/mol

VQ-030555

Reference Standard

Ketanserin chemical structure

CAS: 74050-98-9
Formula: C₂₂H₂₂FN₃O₃
MW: 395.4 g/mol

VQ-048741

Reference Standard

Ketanserin Tartrate chemical structure

Ketanserin Tartrate

CAS: 83846-83-7
Formula: C₂₆H₂₈FN₃O₉
MW: 545.5 g/mol

VQ-048740

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 Palonosetron chemical structure

Keto Palonosetron

CAS: 848074-10-2
Formula: C₁₉H₂₂N₂O₂
MW: 310.4 g/mol

VQ-041315

Reference Standard

Keto Pioglitazone (M-III) chemical structure

Keto Pioglitazone (M-III)

CAS: 146062-45-5
Formula: C₁₉H₁₈N₂O₄S
MW: 370.4 g/mol

VQ-027508

Reference Standard

Keto Ziprasidone chemical structure

Keto Ziprasidone

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

VQ-043006

Reference Standard

Keto-Ertugliflozin chemical structure

Keto-Ertugliflozin

CAS: 1298086-37-9
Formula: C₂₂H₂₃ClO₈
MW: 450.9 g/mol

VQ-030534

Reference Standard

Ketoconazole chemical structure

CAS: 65277-42-1
Formula: C₂₆H₂₈Cl₂N₄O₄
MW: 531.4 g/mol

In stock

Reference Standard

Ketoconazole EP Impurity A chemical structure

Ketoconazole EP Impurity A

CAS: 254912-63-5
Formula: C₂₆H₂₆Cl₂N₄O₄
MW: 529.4 g/mol

VQ-031371

Reference Standard

Ketoconazole EP Impurity C chemical structure

Ketoconazole EP Impurity C

CAS: 83374-59-8
Formula: C₂₆H₂₈Cl₂N₄O₄
MW: 531.4 g/mol

VQ-031368

Reference Standard

Ketoconazole EP Impurity D chemical structure

Ketoconazole EP Impurity D

CAS: 67914-61-8
Formula: C₂₄H₂₆Cl₂N₄O₃
MW: 489.4 g/mol

VQ-022900

Reference Standard

Ketoconazole EP Impurity E chemical structure

Ketoconazole EP Impurity E

CAS: 134071-44-6
Formula: C₂₁H₂₀Cl₂N₂O₅S
MW: 483.4 g/mol

VQ-026286

Reference Standard

Ketoconazole Hydroxymethyl Impurity chemical structure

Ketoconazole Hydroxymethyl Impurity

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

VQ-031370

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