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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 Terbinafine chemical structure

N-Desmethyl Terbinafine

CAS: 99473-11-7
Formula: C₂₀H₂₃N
MW: 277.4 g/mol

VQ-042439

Reference Standard

N-Desmethyl Terbinafine Hydrochloride chemical structure

N-Desmethyl Terbinafine Hydrochloride

CAS: 152830-98-3
Formula: C₂₀H₂₄ClN
MW: 313.9 g/mol

VQ-043318

Reference Standard

N-Desmethyl Thiothixene (Mixture of E/Z-isomers) chemical structure

N-Desmethyl Thiothixene (Mixture of E/Z-isomers)

CAS: 84294-04-2
Formula: C₂₂H₂₇N₃O₂S₂
MW: 429.6 g/mol

VQ-034205

Reference Standard

N-Desmethyl Topotecan chemical structure

N-Desmethyl Topotecan

CAS: 190710-79-3
Formula: C₂₂H₂₁N₃O₅
MW: 407.4 g/mol

VQ-034364

Reference Standard

N-Desmethyl Toremifene chemical structure

N-Desmethyl Toremifene

CAS: 110503-61-2
Formula: C₂₅H₂₆ClNO
MW: 391.9 g/mol

VQ-042625

Reference Standard

N-Desmethyl Trifluoperazine chemical structure

N-Desmethyl Trifluoperazine

CAS: 2804-16-2
Formula: C₂₀H₂₂F₃N₃S
MW: 393.5 g/mol

VQ-043176

Reference Standard

N-Desmethyl Trilaciclib chemical structure

N-Desmethyl Trilaciclib

CAS: 1374743-01-7
Formula: C₂₃H₂₈N₈O
MW: 432.5 g/mol

VQ-042694

Reference Standard

N-Desmethyl Ulipristal Acetate chemical structure

N-Desmethyl Ulipristal Acetate

CAS: 159681-66-0
Formula: C₂₉H₃₅NO₄
MW: 461.6 g/mol

VQ-028576

Reference Standard

N-Desmethyl Vandetanib chemical structure

N-Desmethyl Vandetanib

CAS: 338992-12-4
Formula: C₂₁H₂₂BrFN₄O₂
MW: 461.3 g/mol

VQ-028633

Reference Standard

N-Desmethyl Venlafaxine Cyclic Impurity chemical structure

N-Desmethyl Venlafaxine Cyclic Impurity

CAS: 727728-51-0
Formula: C₁₆H₂₃NO₂
MW: 261.36 g/mol

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Reference Standard

N-Desmethyl Verapamil-d7 Hydrochloride chemical structure

N-Desmethyl Verapamil-d7 Hydrochloride

CAS: 1216413-74-9
Formula: C₂₆H₃₇ClN₂O₄
MW: 484.1 g/mol

VQ-042869

Reference Standard

N-Desmethyl Vinblastine chemical structure

N-Desmethyl Vinblastine

CAS: 18172-50-4
Formula: C₄₅H₅₆N₄O₉
MW: 796.9 g/mol

VQ-028713

Reference Standard

N-Desmethyl Xanomeline chemical structure

N-Desmethyl Xanomeline

CAS: 131986-96-4
Formula: C₁₃H₂₁N₃OS
MW: 267.39 g/mol

VQ-034709

Reference Standard

N-Desmethyl Zolmitriptan chemical structure

N-Desmethyl Zolmitriptan

CAS: 139264-35-0
Formula: C₁₅H₁₉N₃O₂
MW: 273.33 g/mol

VQ-024053

Reference Standard

N-Desmethyl Zopiclone chemical structure

N-Desmethyl Zopiclone

CAS: 59878-63-6
Formula: C₁₆H₁₅ClN₆O₃
MW: 374.78 g/mol

VQ-043353

Reference Standard

N-Desmethyl Zopiclone HCl chemical structure

N-Desmethyl Zopiclone HCl

CAS: 1216659-29-8
Formula: C₁₆H₁₆Cl₂N₆O₃
MW: 411.2 g/mol

VQ-043781

Reference Standard

N-Desmethyl-4-Hydroxyatomoxetine-O glucuronide chemical structure

N-Desmethyl-4-Hydroxyatomoxetine-O glucuronide

CAS: 540729-10-0
Formula: C₂₂H₂₇NO₈
MW: 433.5 g/mol

VQ-045013

Reference Standard

N-Desmethyl-4'-hydroxy Tamoxifen-d3 (E/Z Mixture) chemical structure

N-Desmethyl-4'-hydroxy Tamoxifen-d3 (E/Z Mixture)

CAS: 1795139-22-8
Formula: C₂₅H₂₇NO₂
MW: 376.5 g/mol

VQ-042405

Reference Standard

N-Desmethyl-benztropine Hydrochloride chemical structure

N-Desmethyl-benztropine Hydrochloride

CAS: 25471-67-4
Formula: C₂₀H₂₄ClNO
MW: 329.9 g/mol

VQ-021781

Reference Standard

N-Desmethyl-N-2(2-cyanobenzyl) Alogliptin chemical structure

N-Desmethyl-N-2(2-cyanobenzyl) Alogliptin

CAS: 865759-10-0
Formula: C₂₅H₂₄N₆O₂
MW: 440.5 g/mol

VQ-020772

Reference Standard

N-DesmethylBendamustine chemical structure

N-DesmethylBendamustine

CAS: 41515-13-3
Formula: C₁₅H₁₉Cl₂N₃O₂
MW: 344.2 g/mol

VQ-035926

Reference Standard

N-Desmethyldoxylamine chemical structure

N-Desmethyldoxylamine

CAS: 78868-03-8
Formula: C₁₆H₂₀N₂O
MW: 256.34 g/mol

VQ-025406

Reference Standard

N-Desmethylpheniramine chemical structure

N-Desmethylpheniramine

CAS: 19428-44-5
Formula: C₁₅H₁₈N₂
MW: 226.32 g/mol

VQ-043253

Reference Standard

N-Desmethylsertraline chemical structure

N-Desmethylsertraline

CAS: 918933-19-4
Formula: C₁₆H₁₅Cl₂N
MW: 292.2 g/mol

VQ-043929

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