Skip to content

Product division

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 Norfloxacin chemical structure

N-Nitroso Norfloxacin

CAS: 74011-53-3
Formula: C₁₆H₁₇FN₄O₄
MW: 348.33 g/mol

VQ-023301

Reference Standard

N-Nitroso Nortropine chemical structure

N-Nitroso Nortropine

CAS: 2659259-66-0
Formula: C₇H₁₂N₂O₂
MW: 156.18 g/mol

VQ-020861

Reference Standard

N-Nitroso Nortropinone chemical structure

N-Nitroso Nortropinone

CAS: 1824383-71-2
Formula: C₇H₁₀N₂O₂
MW: 154.17 g/mol

VQ-037724

Reference Standard

N-Nitroso Paclitaxel chemical structure

N-Nitroso Paclitaxel

CAS: 1053697-17-8
Formula: C₄₇H₅₀N₂O₁₅
MW: 882.9 g/mol

VQ-045083

Reference Standard

N-Nitroso Paliperidone chemical structure

N-Nitroso Paliperidone

CAS: 2416230-38-9
Formula: C₁₂H₁₂FN₃O₂
MW: 249.24 g/mol

In stock

Reference Standard

N-Nitroso Paracetamol EP Impurity M chemical structure

N-Nitroso Paracetamol EP Impurity M

Formula: C₁₂H₁₀N₂O₃
MW: 230.22 g/mol

In stock

Reference Standard

N-Nitroso Paroxetine chemical structure

N-Nitroso Paroxetine

CAS: 2361294-43-9
Formula: C₁₉H₁₉FN₂O₄
MW: 358.4 g/mol

VQ-021307

Reference Standard

N-Nitroso Perindopril chemical structure

N-Nitroso Perindopril

CAS: 3036581-82-2
Formula: C₁₉H₃₁N₃O₆
MW: 397.5 g/mol

In stock

Reference Standard

N-Nitroso Phenylephrine chemical structure

N-Nitroso Phenylephrine

CAS: 78658-64-7
Formula: C₉H₁₂N₂O₃
MW: 196.2 g/mol

VQ-023694

Reference Standard

N-Nitroso Pirfenidone EP Impurity A chemical structure

N-Nitroso Pirfenidone EP Impurity A

CAS: 126209-21-0
Formula: C₆H₇N₃O
MW: 137.14 g/mol

VQ-033127

Reference Standard

N-Nitroso Pirfenidone EP Impurity B chemical structure

N-Nitroso Pirfenidone EP Impurity B

CAS: 2512237-43-1
Formula: C₆H₆N₂O₂
MW: 138.12 g/mol

VQ-027446

Reference Standard

N-Nitroso Potassium Clavulanate EP Impurity L

N-Nitroso Potassium Clavulanate EP Impurity L

CAS: 54044-82-5
Formula: C₈H₁₉N₃O
MW: 173.26 g/mol

VQ-033261

Reference Standard

N-Nitroso Pramipexole chemical structure

N-Nitroso Pramipexole

CAS: 3028194-78-4
Formula: C₁₀H₁₆N₄OS
MW: 240.33 g/mol

In stock

Reference Standard

N-Nitroso Prazosin EP Impurity C

N-Nitroso Prazosin EP Impurity C

CAS: 3112735-70-0
Formula: C₁₄H₁₈N₆O₃
MW: 318.33 g/mol

In stock

Reference Standard

N-Nitroso Prazosin EP Impurity D

N-Nitroso Prazosin EP Impurity D

Formula: C₉H₁₁N₃O₃
MW: 209.2 g/mol

In stock

Reference Standard

N-Nitroso Prilocaine chemical structure

N-Nitroso Prilocaine

CAS: 211490-46-9
Formula: C₁₃H₁₉N₃O₂
MW: 249.31 g/mol

VQ-023552

Reference Standard

N-Nitroso Propranolol chemical structure

N-Nitroso Propranolol

CAS: 84418-35-9
Formula: C₁₆H₂₀N₂O₃
MW: 288.34 g/mol

In stock

Reference Standard

N-Nitroso Pyrantel Pamoate Impurity

N-Nitroso Pyrantel Pamoate Impurity

Formula: C₁₁H₁₅N₃O₂S
MW: 253.32 g/mol

In stock

Reference Standard

N-Nitroso Pyrantel Pamoate Impurity (stage-I) chemical structure

N-Nitroso Pyrantel Pamoate Impurity (stage-I)

CAS: 1449108-86-4
Formula: C₁₆H₂₄N₂O₃S
MW: 324.4 g/mol

In stock

Reference Standard

N-Nitroso Pyrantel Pamoate Impurity (stage-II)(Freebase) chemical structure

N-Nitroso Pyrantel Pamoate Impurity (stage-II)(Freebase)

CAS: 36700-39-7
Formula: C₁₁H₁₆N₂OS
MW: 224.32 g/mol

VQ-006946

Reference Standard

N-Nitroso Pyrantel Pamoate Impurity (stage-II)(Hydrochloride) chemical structure

N-Nitroso Pyrantel Pamoate Impurity (stage-II)(Hydrochloride)

CAS: 1449108-90-0
Formula: C₁₁H₁₇ClN₂OS
MW: 260.78 g/mol

In stock

Reference Standard

N-Nitroso Quetiapine HEEP Impurity chemical structure

N-Nitroso Quetiapine HEEP Impurity

CAS: 73486-81-4
Formula: C₈H₁₇N₃O₃
MW: 203.24 g/mol

VQ-021295

Reference Standard

N-Nitroso Quinapril chemical structure

N-Nitroso Quinapril

CAS: 2922985-13-3
Formula: C₂₅H₂₉N₃O₆
MW: 467.5 g/mol

VQ-044306

Reference Standard

N-Nitroso Quinapril Decarboxy Impurity (Rotamers)

N-Nitroso Quinapril Decarboxy Impurity (Rotamers)

Formula: C₂₄H₂₉N₃O₄
MW: 423.51 g/mol

In stock

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales