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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-Desmethyl Neratinib chemical structure

N-Desmethyl Neratinib

CAS: 915788-27-1
Formula: C₂₉H₂₇ClN₆O₃
MW: 543 g/mol

VQ-023231

Reference Standard

N-Desmethyl Netupitant chemical structure

N-Desmethyl Netupitant

CAS: 290296-72-9
Formula: C₂₉H₃₀F₆N₄O
MW: 564.6 g/mol

VQ-023235

Reference Standard

N-Desmethyl O-Methyl Clobazam chemical structure

N-Desmethyl O-Methyl Clobazam

CAS: 2009208-96-0
Formula: C₁₆H₁₅ClN₂O₃
MW: 318.75 g/mol

VQ-045386

Reference Standard

N-Desmethyl Osimertinib Impurity (Intermediate)

N-Desmethyl Osimertinib Impurity (Intermediate)

Formula: C₃₄H₄₅N₇O₅
MW: 631.76 g/mol

In stock

Reference Standard

N-Desmethyl Paroxol Hydrochloride chemical structure

N-Desmethyl Paroxol Hydrochloride

CAS: 220548-73-2
Formula: C₁₂H₁₇ClFNO
MW: 245.72 g/mol

VQ-023471

Reference Standard

N-Desmethyl Pimavanserin chemical structure

N-Desmethyl Pimavanserin

CAS: 639863-77-7
Formula: C₂₄H₃₂FN₃O₂
MW: 413.5 g/mol

VQ-041480

Reference Standard

N-Desmethyl Prochlorperazine Dimaleate chemical structure

N-Desmethyl Prochlorperazine Dimaleate

CAS: 13500-92-0
Formula: C₂₇H₃₀ClN₃O₈S
MW: 592.1 g/mol

VQ-027633

Reference Standard

N-Desmethyl Regorafenib N-Oxide chemical structure

N-Desmethyl Regorafenib N-Oxide

CAS: 835621-12-0
Formula: C₂₀H₁₃ClF₄N₄O₄
MW: 484.8 g/mol

VQ-027766

Reference Standard

N-Desmethyl Ribociclib chemical structure

N-Desmethyl Ribociclib

CAS: 1211441-59-6
Formula: C₂₂H₂₈N₈O
MW: 420.5 g/mol

VQ-035039

Reference Standard

N-Desmethyl Ripretinib

N-Desmethyl Ripretinib

CAS: 1442473-09-7
Formula: C₂₃H₁₉BrFN₅O₂
MW: 496.34 g/mol

VQ-033563

Reference Standard

N-Desmethyl Rivastigmine chemical structure

N-Desmethyl Rivastigmine

CAS: 1070660-34-2
Formula: C₁₃H₂₀N₂O₂
MW: 236.31 g/mol

In stock

Reference Standard

N-Desmethyl Rosiglitazone chemical structure

N-Desmethyl Rosiglitazone

CAS: 257892-31-2
Formula: C₁₇H₁₇N₃O₃S
MW: 343.4 g/mol

VQ-043283

Reference Standard

N-Desmethyl Rosuvastatin chemical structure

N-Desmethyl Rosuvastatin

CAS: 371775-74-5
Formula: C₂₁H₂₆FN₃O₆S
MW: 467.5 g/mol

VQ-043527

Reference Standard

N-Desmethyl Rosuvastatin Disodium Impurity chemical structure

N-Desmethyl Rosuvastatin Disodium Impurity

CAS: 2626928-14-9
Formula: C₂₁H₂₄FN₃Na₂O₆S
MW: 511.5 g/mol

VQ-042016

Reference Standard

N-Desmethyl Rosuvastatin Lactone chemical structure

N-Desmethyl Rosuvastatin Lactone

CAS: 1797419-58-9
Formula: C₂₁H₂₄FN₃O₅S
MW: 449.5 g/mol

VQ-035553

Reference Standard

N-Desmethyl Sarpogrelate chemical structure

N-Desmethyl Sarpogrelate

CAS: 1659311-47-3
Formula: C₂₃H₂₉NO₆
MW: 415.5 g/mol

VQ-042105

Reference Standard

N-Desmethyl Selumetinib chemical structure

N-Desmethyl Selumetinib

CAS: 606143-88-8
Formula: C₁₆H₁₃BrClFN₄O₃
MW: 443.7 g/mol

VQ-033806

Reference Standard

N-Desmethyl sertraline chemical structure

N-Desmethyl sertraline

CAS: 87857-41-8
Formula: C₁₆H₁₅Cl₂N
MW: 292.2 g/mol

VQ-033821

Reference Standard

N-Desmethyl Sibutramine chemical structure

N-Desmethyl Sibutramine

CAS: 168835-59-4
Formula: C₁₆H₂₄ClN
MW: 265.82 g/mol

VQ-042157

Reference Standard

N-Desmethyl Sildenafil-d8 chemical structure

N-Desmethyl Sildenafil-d8

CAS: 1185168-06-2
Formula: C₂₁H₂₈N₆O₄S
MW: 468.6 g/mol

VQ-033841

Reference Standard

N-Desmethyl Sorafenib chemical structure

N-Desmethyl Sorafenib

CAS: 284461-74-1
Formula: C₂₀H₁₄ClF₃N₄O₃
MW: 450.8 g/mol

VQ-033923

Reference Standard

N-Desmethyl Sorafenib (Pyridine)-N-oxide chemical structure

N-Desmethyl Sorafenib (Pyridine)-N-oxide

CAS: 583840-04-4
Formula: C₂₀H₁₄ClF₃N₄O₄
MW: 466.8 g/mol

VQ-043895

Reference Standard

N-Desmethyl Tadalafil chemical structure

N-Desmethyl Tadalafil

CAS: 171596-36-4
Formula: C₂₁H₁₇N₃O₄
MW: 375.4 g/mol

VQ-028181

Reference Standard

N-Desmethyl Tamoxifen Hydrochloride chemical structure

N-Desmethyl Tamoxifen Hydrochloride

CAS: 15917-65-4
Formula: C₂₅H₂₈ClNO
MW: 393.9 g/mol

VQ-028193

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