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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Roflumilast chemical structure

CAS: 162401-32-3
Formula: C₁₇H₁₄Cl₂F₂N₂O₃
MW: 403.2 g/mol

In stock

Reference Standard

Roflumilast Dicyclopropylmethoxy Impurity chemical structure

Roflumilast Dicyclopropylmethoxy Impurity

CAS: 1391052-24-6
Formula: C₂₀H₂₀Cl₂N₂O₃
MW: 407.3 g/mol

In stock

Reference Standard

Roflumilast Dimer chemical structure

Roflumilast Dimer

CAS: 1352122-37-2
Formula: C₂₉H₂₄Cl₂F₄N₂O₆
MW: 643.4 g/mol

VQ-033630

Reference Standard

Roflumilast dimethylcarbamate

Roflumilast dimethylcarbamate

CAS: 2048860-65-5
Formula: C₁₆H₁₃Cl₂F₂N₃O₄
MW: 420.2 g/mol

VQ-033636

Reference Standard

Roflumilast Impurity 9 chemical structure

Roflumilast Impurity 9

CAS: 162401-78-7
Formula: C₁₂H₁₂F₂O₃
MW: 242.22 g/mol

VQ-045346

Reference Standard

Roflumilast Impurity B chemical structure

Roflumilast Impurity B

CAS: 1391052-76-8
Formula: C₁₃H₈Cl₂F₂N₂O₃
MW: 349.11 g/mol

VQ-033632

Reference Standard

Roflumilast N-oxide chemical structure

Roflumilast N-oxide

CAS: 292135-78-5
Formula: C₁₇H₁₄Cl₂F₂N₂O₄
MW: 419.2 g/mol

VQ-023671

Reference Standard

Roflumilast N-Oxide-d4 chemical structure

Roflumilast N-Oxide-d4

CAS: 1794760-31-8
Formula: C₁₇H₁₄Cl₂F₂N₂O₄
MW: 423.2 g/mol

VQ-033637

Reference Standard

Roflumilast-d4 chemical structure

CAS: 1398065-69-4
Formula: C₁₇H₁₄Cl₂F₂N₂O₃
MW: 407.2 g/mol

VQ-041987

Reference Standard

Rolapitant chemical structure

CAS: 552292-08-7
Formula: C₂₅H₂₆F₆N₂O₂
MW: 500.5 g/mol

VQ-041988

Reference Standard

Rolapitant Hydrochloride Hydrate chemical structure

Rolapitant Hydrochloride Hydrate

CAS: 914462-92-3
Formula: C₂₅H₂₉ClF₆N₂O₃
MW: 555 g/mol

VQ-041989

Reference Standard

Rolipram chemical structure

CAS: 61413-54-5
Formula: C₁₆H₂₁NO₃
MW: 275.34 g/mol

VQ-041990

Reference Standard

Romidepsin chemical structure

CAS: 128517-07-7
Formula: C₂₄H₃₆N₄O₆S₂
MW: 540.7 g/mol

VQ-027884

Reference Standard

Romifidine chemical structure

CAS: 65896-16-4
Formula: C₉H₉BrFN₃
MW: 258.09 g/mol

VQ-041991

Reference Standard

Romifidine Hydrochloride chemical structure

Romifidine Hydrochloride

CAS: 65896-14-2
Formula: C₉H₁₀BrClFN₃
MW: 294.55 g/mol

VQ-033638

Reference Standard

Ronidazole chemical structure

CAS: 7681-76-7
Formula: C₆H₈N₄O₄
MW: 200.15 g/mol

VQ-041992

Reference Standard

Ronidazole-d3 chemical structure

CAS: 1015855-87-4
Formula: C₆H₈N₄O₄
MW: 203.17 g/mol

VQ-041993

Reference Standard

Ropinirole chemical structure

CAS: 91374-21-9
Formula: C₁₆H₂₄N₂O
MW: 260.37 g/mol

VQ-007729

Reference Standard

Ropinirole Aminoacetic Acid chemical structure

Ropinirole Aminoacetic Acid

CAS: 920755-10-8
Formula: C₁₆H₂₆N₂O₂
MW: 278.39 g/mol

VQ-027893

Reference Standard

Ropinirole Cyclopentanylindolinone Impurity chemical structure

Ropinirole Cyclopentanylindolinone Impurity

CAS: 1368745-05-4
Formula: C₁₀H₉NO
MW: 159.18 g/mol

VQ-027891

Reference Standard

Ropinirole EP Impurity A chemical structure

Ropinirole EP Impurity A

CAS: 102842-51-3
Formula: C₁₆H₂₂N₂O₂
MW: 274.36 g/mol

VQ-027892

Reference Standard

Ropinirole EP Impurity B chemical structure

Ropinirole EP Impurity B

CAS: 249622-60-4
Formula: C₁₆H₂₄N₂O
MW: 260.37 g/mol

In stock

Reference Standard

Ropinirole EP Impurity C chemical structure

Ropinirole EP Impurity C

CAS: 784110-47-0
Formula: C₁₉H₂₈N₂O
MW: 300.4 g/mol

VQ-035369

Reference Standard

Ropinirole EP Impurity C chemical structure

Ropinirole EP Impurity C

CAS: 145570-92-9
Formula: C₁₉H₂₉ClN₂O
MW: 336.9 g/mol

VQ-041996

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