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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 Rac N-Desmethyl Tramadol

N-Nitroso Rac N-Desmethyl Tramadol

Formula: C₁₅H₂₂N₂O₃
MW: 278.35 g/mol

VQ-006949

Reference Standard

N-Nitroso Ramipril chemical structure

N-Nitroso Ramipril

CAS: 3028194-80-8
Formula: C₂₃H₃₁N₃O₆
MW: 445.5 g/mol

In stock

Reference Standard

N-Nitroso Ranolazine Impurity C chemical structure

N-Nitroso Ranolazine Impurity C

Formula: C₁₄H₂₁N₃O₄
MW: 295.33 g/mol

In stock

Reference Standard

N-Nitroso Ranolazine USP Related Compound C chemical structure

N-Nitroso Ranolazine USP Related Compound C

Formula: C₁₄H₂₀N₄O₂
MW: 276.33 g/mol

In stock

Reference Standard

N-Nitroso Ranolazine USP Related Compound C

N-Nitroso Ranolazine USP Related Compound C

CAS: 3038740-93-8
Formula: C₁₄H₂₀N₄O₂
MW: 276.33 g/mol

VQ-035222

Reference Standard

N-Nitroso Rasagiline chemical structure

N-Nitroso Rasagiline

CAS: 2470278-90-9
Formula: C₁₂H₁₂N₂O
MW: 200.24 g/mol

In stock

Reference Standard

N-Nitroso Ribociclib Impurity 4 chemical structure

N-Nitroso Ribociclib Impurity 4

Formula: C₉H₁₀BrClN₄O
MW: 305.56 g/mol

VQ-006954

Reference Standard

N-Nitroso Risdiplam chemical structure

N-Nitroso Risdiplam

Formula: C₂₂H₂₂N₈O₂
MW: 430.5 g/mol

In stock

Reference Standard

N-Nitroso Ritalinic Acid chemical structure

N-Nitroso Ritalinic Acid

CAS: 2932440-73-6
Formula: C₁₃H₁₆N₂O₃
MW: 248.28 g/mol

In stock

Reference Standard

N-Nitroso Rivaroxaban Open-Ring Acid Impurity chemical structure

N-Nitroso Rivaroxaban Open-Ring Acid Impurity

CAS: 3069765-41-6
Formula: C₁₉H₁₉ClN₄O₇S
MW: 482.9 g/mol

VQ-033612

Reference Standard

N-Nitroso Sacubitril Impurity 1

N-Nitroso Sacubitril Impurity 1

Formula: C₁₈H₁₈N₂O₂
MW: 294.35 g/mol

In stock

Reference Standard

N-Nitroso Safinamide chemical structure

N-Nitroso Safinamide

CAS: 2657645-00-4
Formula: C₁₇H₁₈FN₃O₃
MW: 331.34 g/mol

VQ-021336

Reference Standard

N-Nitroso Salbutamol chemical structure

N-Nitroso Salbutamol

CAS: 2919946-71-5
Formula: C₁₃H₂₀N₂O₄
MW: 268.31 g/mol

VQ-023727

Reference Standard

N-Nitroso Salmeterol chemical structure

N-Nitroso Salmeterol

CAS: 3036581-81-1
Formula: C₂₅H₃₆N₂O₅
MW: 444.6 g/mol

VQ-028943

Reference Standard

N-Nitroso Sarcosine D3 chemical structure

N-Nitroso Sarcosine D3

CAS: 1189871-94-0
Formula: C₃H₆N₂O₃
MW: 121.11 g/mol

VQ-052462

Reference Standard

N-Nitroso Simazine chemical structure

N-Nitroso Simazine

CAS: 6494-81-1
Formula: C₇H₁₁ClN₆O
MW: 230.65 g/mol

VQ-043627

Reference Standard

N-Nitroso Sotalol (Rotamers) chemical structure

N-Nitroso Sotalol (Rotamers)

CAS: 134720-07-3
Formula: C₁₂H₁₉N₃O₄S
MW: 301.36 g/mol

In stock

Reference Standard

N-Nitroso Sumatriptan EP Impurity B chemical structure

N-Nitroso Sumatriptan EP Impurity B

CAS: 3036581-86-6
Formula: C₁₃H₁₈N₄O₃S
MW: 310.37 g/mol

VQ-033991

Reference Standard

N-Nitroso Tamsulosin Impurity chemical structure

N-Nitroso Tamsulosin Impurity

CAS: 2892260-31-8
Formula: C₂₀H₂₇N₃O₆S
MW: 437.5 g/mol

In stock

Reference Standard

N-Nitroso Terazosin EP Impurity N chemical structure

N-Nitroso Terazosin EP Impurity N

CAS: 2470438-57-2
Formula: C₉H₁₅N₃O₃
MW: 213.23 g/mol

In stock

Reference Standard

N-Nitroso Terbinafine EP Impurity A chemical structure

N-Nitroso Terbinafine EP Impurity A

CAS: 296760-88-8
Formula: C₁₂H₁₂N₂O
MW: 200.24 g/mol

In stock

Reference Standard

N-Nitroso Tert Butyl Amine chemical structure

N-Nitroso Tert Butyl Amine

CAS: 744965-41-1
Formula: C₄H₁₀N₂O
MW: 102.14 g/mol

VQ-040627

Reference Standard

N-Nitroso Tetracaine chemical structure

N-Nitroso Tetracaine

CAS: 3038740-94-9
Formula: C₁₅H₂₃N₃O₃
MW: 293.36 g/mol

VQ-028309

Reference Standard

N-Nitroso Thiazolidine chemical structure

N-Nitroso Thiazolidine

CAS: 73870-33-4
Formula: C₃H₆N₂OS
MW: 118.16 g/mol

VQ-027197

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