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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

N-Nitroso ketamine chemical structure

N-Nitroso ketamine

CAS: 86144-35-6
Formula: C₁₃H₁₅ClN₂O₂
MW: 266.72 g/mol

VQ-031366

Reference Standard

N-Nitroso L-Arginine chemical structure

N-Nitroso L-Arginine

CAS: 151512-14-0
Formula: C₆H₁₂N₄O₃
MW: 188.18 g/mol

VQ-028967

Reference Standard

N-Nitroso Labetalol chemical structure

N-Nitroso Labetalol

CAS: 2820170-74-7
Formula: C₁₉H₂₃N₃O₄
MW: 357.4 g/mol

VQ-021245

Reference Standard

N-Nitroso Leucine Impurity chemical structure

N-Nitroso Leucine Impurity

CAS: 78814-91-2
Formula: C₈H₁₄N₂O₄
MW: 202.21 g/mol

VQ-031603

Reference Standard

N-Nitroso Levofloxacin EP Impurity B chemical structure

N-Nitroso Levofloxacin EP Impurity B

CAS: 1152314-62-9
Formula: C₁₇H₁₇FN₄O₅
MW: 376.3 g/mol

In stock

Reference Standard

N-Nitroso Levomefolate Impurity 1

N-Nitroso Levomefolate Impurity 1

Formula: C₂₀H₂₄N₈O₇
MW: 488.45 g/mol

VQ-006911

Reference Standard

N-Nitroso Lidocaine EP Impurity D chemical structure

N-Nitroso Lidocaine EP Impurity D

CAS: 3033377-17-9
Formula: C₁₂H₁₇N₃O₂
MW: 235.28 g/mol

VQ-022994

Reference Standard

N-Nitroso Linagliptin Impurity (R Isomer) chemical structure

N-Nitroso Linagliptin Impurity (R Isomer)

CAS: 3031851-92-7
Formula: C₁₀H₁₉N₃O₃
MW: 229.28 g/mol

VQ-006912

Reference Standard

N-Nitroso Linezolid Impurity-B

N-Nitroso Linezolid Impurity-B

Formula: C₁₅H₂₁FN₄O₄
MW: 340.35 g/mol

In stock

Reference Standard

N-Nitroso Lisinopril chemical structure

N-Nitroso Lisinopril

CAS: 519175-80-5
Formula: C₂₁H₃₀N₄O₆
MW: 434.5 g/mol

In stock

Reference Standard

N-Nitroso Lorcaserin chemical structure

N-Nitroso Lorcaserin

CAS: 2518136-84-8
Formula: C₁₁H₁₃ClN₂O
MW: 224.68 g/mol

VQ-038135

Reference Standard

N-Nitroso Macitentan Hydroxy N-Propyl Impurity

N-Nitroso Macitentan Hydroxy N-Propyl Impurity

CAS: 3104323-52-3
Formula: C₁₅H₁₇BrN₄O₃
MW: 381.22 g/mol

VQ-038239

Reference Standard

N-Nitroso Maprotiline chemical structure

N-Nitroso Maprotiline

CAS: 204268-61-1
Formula: C₂₀H₂₂N₂O
MW: 306.4 g/mol

VQ-031718

Reference Standard

N-Nitroso Mavacamten

N-Nitroso Mavacamten

Formula: C₁₅H₁₈N₄O₃
MW: 302.33 g/mol

In stock

Reference Standard

N-Nitroso Mefloquine (Rotamers)

N-Nitroso Mefloquine (Rotamers)

Formula: C₁₇H₁₅F₆N₃O₂
MW: 407.31 g/mol

In stock

Reference Standard

N-Nitroso Melatonin chemical structure

N-Nitroso Melatonin

CAS: 278783-22-5
Formula: C₁₃H₁₅N₃O₃
MW: 261.28 g/mol

VQ-021273

Reference Standard

N-Nitroso Meropenem (Rotamers)

N-Nitroso Meropenem (Rotamers)

CAS: 3112735-69-7
Formula: C₁₇H₂₄N₄O₆S
MW: 412.46 g/mol

In stock

Reference Standard

N-Nitroso Methylphenidate chemical structure

N-Nitroso Methylphenidate

CAS: 55557-03-4
Formula: C₁₄H₁₈N₂O₃
MW: 262.3 g/mol

VQ-035456

Reference Standard

N-Nitroso Metoprolol chemical structure

N-Nitroso Metoprolol

CAS: 138768-62-4
Formula: C₁₅H₂₄N₂O₄
MW: 296.36 g/mol

In stock

Reference Standard

N-Nitroso Midazolam EP Impurity A chemical structure

N-Nitroso Midazolam EP Impurity A

CAS: 59469-02-2
Formula: C₁₈H₁₄ClFN₄O
MW: 356.8 g/mol

VQ-044844

Reference Standard

N-Nitroso Mirabegron chemical structure

N-Nitroso Mirabegron

CAS: 3017159-61-1
Formula: C₂₁H₂₃N₅O₃S
MW: 425.5 g/mol

In stock

Reference Standard

N-Nitroso Mirabegron EP Impurity C

N-Nitroso Mirabegron EP Impurity C

Formula: C₂₁H₂₃N₅O₂S
MW: 409.5 g/mol

In stock

Reference Standard

N-Nitroso Mirabegron EP Impurity D

N-Nitroso Mirabegron EP Impurity D

Formula: C₂₆H₂₇N₇O₄S₂
MW: 565.67 g/mol

VQ-006921

Reference Standard

N-Nitroso Moexipril chemical structure

N-Nitroso Moexipril

CAS: 1026879-47-9
Formula: C₂₇H₃₃N₃O₈
MW: 527.6 g/mol

VQ-023169

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