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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

Nabumetone EP Impurity A chemical structure

Nabumetone EP Impurity A

CAS: 343272-52-6
Formula: C₁₈H₂₀O₂
MW: 268.3 g/mol

VQ-023194

Reference Standard

Nabumetone EP Impurity B chemical structure

Nabumetone EP Impurity B

CAS: 343272-51-5
Formula: C₁₈H₁₈O₂
MW: 266.3 g/mol

VQ-023192

Reference Standard

Nabumetone EP Impurity C chemical structure

Nabumetone EP Impurity C

CAS: 65726-24-1
Formula: C₁₅H₁₈O₂
MW: 230.3 g/mol

VQ-023190

Reference Standard

Nabumetone EP Impurity D chemical structure

Nabumetone EP Impurity D

CAS: 127053-22-9
Formula: C₁₅H₁₄O₂
MW: 226.27 g/mol

VQ-023188

Reference Standard

Nabumetone EP Impurity E chemical structure

Nabumetone EP Impurity E

CAS: 343272-53-7
Formula: C₂₇H₂₆O₃
MW: 398.5 g/mol

VQ-026811

Reference Standard

Nabumetone EP Impurity F chemical structure

Nabumetone EP Impurity F

CAS: 29619-45-2
Formula: C₂₂H₁₈O₂
MW: 314.4 g/mol

VQ-023189

Reference Standard

Nabumetone-d3 chemical structure

CAS: 1216770-08-9
Formula: C₁₅H₁₆O₂
MW: 231.3 g/mol

VQ-032044

Reference Standard

Nadifloxacin Impurity 1

Nadifloxacin Impurity 1

CAS: 176775-77-2
Formula: C₁₈H₁₆BF₂NO₇
MW: 407.13 g/mol

VQ-049184

Reference Standard

Nadifloxacin isomer 2 chemical structure

Nadifloxacin isomer 2

CAS: 130539-72-9
Formula: C₁₉H₁₇FN₂O₄
MW: 356.3 g/mol

VQ-038534

Reference Standard

Nadolol chemical structure

CAS: 42200-33-9
Formula: C₁₇H₂₇NO₄
MW: 309.4 g/mol

VQ-023195

Reference Standard

Nadolol EP Impurity A

Nadolol EP Impurity A

CAS: 2892260-37-4
Formula: C₁₃H₁₈O₅
MW: 254.28 g/mol

VQ-026813

Reference Standard

Nadolol EP Impurity B

Nadolol EP Impurity B

CAS: 2714744-89-3
Formula: C₁₄H₂₀O₅
MW: 268.3 g/mol

VQ-038536

Reference Standard

Nadolol EP Impurity D chemical structure

Nadolol EP Impurity D

CAS: 67247-26-1
Formula: C₃₀H₄₃NO₈
MW: 545.7 g/mol

VQ-023198

Reference Standard

Nadolol EP Impurity E

Nadolol EP Impurity E

CAS: 67247-33-0
Formula: C₁₇H₂₆INO₄
MW: 435.3 g/mol

VQ-023199

Reference Standard

Nadolol EP Impurity F chemical structure

Nadolol EP Impurity F

CAS: 2116-22-5
Formula: C₁₇H₂₃NO₂
MW: 273.37 g/mol

VQ-023196

Reference Standard

Nadolol EP Impurity G chemical structure

Nadolol EP Impurity G

CAS: 33841-03-1
Formula: C₁₇H₂₇NO₂
MW: 277.4 g/mol

VQ-023197

Reference Standard

Nadolol Epoxide Impurity chemical structure

Nadolol Epoxide Impurity

CAS: 35697-15-5
Formula: C₁₃H₁₆O₄
MW: 236.26 g/mol

VQ-038537

Reference Standard

Nafamostat Mesylate chemical structure

Nafamostat Mesylate

CAS: 82956-11-4
Formula: C₂₁H₂₅N₅O₈S₂
MW: 539.6 g/mol

VQ-038538

Reference Standard

Nafcillin Sodium Salt chemical structure

Nafcillin Sodium Salt

CAS: 985-16-0
Formula: C₂₁H₂₁N₂NaO₅S
MW: 436.5 g/mol

VQ-038540

Reference Standard

Nafcillin Sulfoxide chemical structure

Nafcillin Sulfoxide

CAS: 41061-20-5
Formula: C₂₁H₂₂N₂O₆S
MW: 430.5 g/mol

VQ-049187

Reference Standard

Nafronyl-d4 chemical structure

CAS: 1215649-28-7
Formula: C₂₄H₃₃NO₃
MW: 387.5 g/mol

VQ-038543

Reference Standard

Naftazone chemical structure

CAS: 15687-37-3
Formula: C₁₁H₉N₃O₂
MW: 215.21 g/mol

VQ-039891

Reference Standard

Naftidrofuryl chemical structure

CAS: 31329-57-4
Formula: C₂₄H₃₃NO₃
MW: 383.5 g/mol

VQ-007595

Reference Standard

Naftidrofuryl EP Impurity A chemical structure

Naftidrofuryl EP Impurity A

CAS: 25379-26-4
Formula: C₁₈H₂₀O₃
MW: 284.3 g/mol

VQ-032050

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