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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-Butyl Olmesartan Medoxomil chemical structure

n-Butyl Olmesartan Medoxomil

CAS: 144689-78-1
Formula: C₃₀H₃₂N₆O₆
MW: 572.6 g/mol

VQ-038740

Reference Standard

N-Butyl Scopine Bromide chemical structure

N-Butyl Scopine Bromide

CAS: 2030294-83-6
Formula: C₁₂H₂₂BrNO₂
MW: 292.21 g/mol

VQ-026091

Reference Standard

N-Butyl-2-Piperidine Carboxylic Acid chemical structure

N-Butyl-2-Piperidine Carboxylic Acid

CAS: 856838-98-7
Formula: C₁₀H₁₉NO₂
MW: 185.26 g/mol

VQ-024684

Reference Standard

N-Butyryl Mesalazine chemical structure

N-Butyryl Mesalazine

CAS: 93968-81-1
Formula: C₁₁H₁₃NO₄
MW: 223.22 g/mol

VQ-026615

Reference Standard

N-Carbamoyl Amoxapine chemical structure

N-Carbamoyl Amoxapine

CAS: 2835304-63-5
Formula: C₃₀H₂₄Cl₂N₄O₃
MW: 559.4 g/mol

VQ-024267

Reference Standard

N-Carbamoyl Degarelix chemical structure

N-Carbamoyl Degarelix

CAS: 2648486-38-6
Formula: C₈₃H₁₀₄ClN₁₉O₁₇
MW: 1675.3 g/mol

VQ-044967

Reference Standard

N-Carbamoyl Linagliptin chemical structure

N-Carbamoyl Linagliptin

CAS: 2983074-55-9
Formula: C₂₆H₂₉N₉O₃
MW: 515.6 g/mol

VQ-026474

Reference Standard

N-Carbamoyl Oxcarbazepine chemical structure

N-Carbamoyl Oxcarbazepine

CAS: 2642430-30-4
Formula: C₁₆H₁₃N₃O₃
MW: 295.29 g/mol

VQ-023430

Reference Standard

N-Carbamyltryptophan chemical structure

N-Carbamyltryptophan

CAS: 54896-75-2
Formula: C₁₂H₁₃N₃O₃
MW: 247.25 g/mol

VQ-032820

Reference Standard

N-Carbobenzoxy-S-phenyl-L-cysteine Methyl Ester chemical structure

N-Carbobenzoxy-S-phenyl-L-cysteine Methyl Ester

CAS: 153277-33-9
Formula: C₁₈H₁₉NO₄S
MW: 345.4 g/mol

VQ-032434

Reference Standard

N-Carbobenzyloxy-3-phenylthio-L-alanine chemical structure

N-Carbobenzyloxy-3-phenylthio-L-alanine

CAS: 159453-24-4
Formula: C₁₇H₁₇NO₄S
MW: 331.4 g/mol

VQ-032437

Reference Standard

N-Carbomethoxyamoxapine chemical structure

N-Carbomethoxyamoxapine

CAS: 371971-25-4
Formula: C₁₉H₁₈ClN₃O₃
MW: 371.8 g/mol

VQ-028890

Reference Standard

N-Carboxybenzyl Valbenazine chemical structure

N-Carboxybenzyl Valbenazine

CAS: 1025504-76-0
Formula: C₃₂H₄₄N₂O₆
MW: 552.7 g/mol

VQ-043695

Reference Standard

N-Carboxymethyl Vinylpyrrolidinone chemical structure

N-Carboxymethyl Vinylpyrrolidinone

CAS: 2324151-81-5
Formula: C₈H₁₁NO₃
MW: 169.18 g/mol

VQ-034929

Reference Standard

N-Cbz-D-Threonine chemical structure

N-Cbz-D-Threonine

CAS: 80384-27-6
Formula: C₁₂H₁₅NO₅
MW: 253.25 g/mol

VQ-040012

Reference Standard

N-Chloro Ethyl Thiotepa chemical structure

N-Chloro Ethyl Thiotepa

CAS: 90877-51-3
Formula: C₆H₁₃ClN₃PS
MW: 225.68 g/mol

VQ-028342

Reference Standard

N-Chloroacetyl DL-Homocysteine Thiolactone chemical structure

N-Chloroacetyl DL-Homocysteine Thiolactone

CAS: 84611-22-3
Formula: C₆H₈ClNO₂S
MW: 193.65 g/mol

VQ-025572

Reference Standard

N-Chloromethyl (S)-Citalopram chemical structure

N-Chloromethyl (S)-Citalopram

CAS: 1248478-42-3
Formula: C₂₁H₂₃Cl₂FN₂O
MW: 409.3 g/mol

VQ-048265

Reference Standard

N-Cyano-N′-[4-(4-morpholinyl)phenyl]guanidine

N-Cyano-N′-[4-(4-morpholinyl)phenyl]guanidine

CAS: 454646-55-0
Formula: C₁₂H₁₅N₅O
MW: 245.28 g/mol

VQ-031978

Reference Standard

N-Cyano-N′-nitrosoguanidine chemical structure

N-Cyano-N′-nitrosoguanidine

CAS: 1132887-26-3
Formula: C₂H₃N₅O
MW: 113.08 g/mol

VQ-044956

Reference Standard

N-Cyclohexyl-N'-phenyl-p-phenylenediamine chemical structure

N-Cyclohexyl-N'-phenyl-p-phenylenediamine

CAS: 101-87-1
Formula: C₁₈H₂₂N₂
MW: 266.4 g/mol

VQ-030180

Reference Standard

N-Cyclohexylcyclohexanimine chemical structure

N-Cyclohexylcyclohexanimine

CAS: 10468-40-3
Formula: C₁₂H₂₁N
MW: 179.3 g/mol

VQ-047936

Reference Standard

N-Cyclopropyl Bimatoprost chemical structure

N-Cyclopropyl Bimatoprost

CAS: 1138395-12-6
Formula: C₂₆H₃₇NO₄
MW: 427.6 g/mol

VQ-044529

Reference Standard

N-De[2-(methylsulfonyl)ethyl] Lapatinib chemical structure

N-De[2-(methylsulfonyl)ethyl] Lapatinib

CAS: 697299-82-4
Formula: C₂₆H₂₀ClFN₄O₂
MW: 474.9 g/mol

VQ-026365

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