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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-(Chloromethyl)-4-(trifluoromethyl)aniline

N-(Chloromethyl)-4-(trifluoromethyl)aniline

CAS: 1903709-86-3
Formula: C₈H₇ClF₃N
MW: 209.6 g/mol

VQ-037921

Reference Standard

N-(Chlorophenyl)-N'-hydroxyguanidine chemical structure

N-(Chlorophenyl)-N'-hydroxyguanidine

CAS: 130974-86-6
Formula: C₇H₈ClN₃O
MW: 185.61 g/mol

VQ-037564

Reference Standard

N-(Destriazolonomethyl) N-(Methylcarboxyacetamidohydrazono) Aprepitant chemical structure

N-(Destriazolonomethyl) N-(Methylcarboxyacetamidohydrazono) Aprepitant

CAS: 219821-37-1
Formula: C₂₄H₂₅F₇N₄O₄
MW: 566.5 g/mol

VQ-024346

Reference Standard

N-(Diazirino[1,3-f]phenanthridin-4-ylmethyl)-N-isobutylpentanamide chemical structure

N-(Diazirino[1,3-f]phenanthridin-4-ylmethyl)-N-isobutylpentanamide

CAS: 1314799-75-1
Formula: C₂₃H₂₇N₃O
MW: 361.5 g/mol

VQ-034530

Reference Standard

N-(Dicyclopropylmethyl)-N'-(2-chloroethyl)urea chemical structure

N-(Dicyclopropylmethyl)-N'-(2-chloroethyl)urea

CAS: 54187-03-0
Formula: C₁₀H₁₇ClN₂O
MW: 216.71 g/mol

VQ-041908

Reference Standard

N-(Formylamidino)-N'-beta-D-ribofuranosylurea chemical structure

N-(Formylamidino)-N'-beta-D-ribofuranosylurea

CAS: 65126-88-7
Formula: C₈H₁₄N₄O₆
MW: 262.22 g/mol

VQ-021691

Reference Standard

N-(Hydroxymethyl)phthalimide chemical structure

N-(Hydroxymethyl)phthalimide

CAS: 118-29-6
Formula: C₉H₇NO₃
MW: 177.16 g/mol

VQ-019621

Reference Standard

N-(Isopropylcarbamoyl)-4-(o-tolylamino)pyridine-3-sulfonamide chemical structure

N-(Isopropylcarbamoyl)-4-(o-tolylamino)pyridine-3-sulfonamide

CAS: 106944-62-1
Formula: C₁₆H₂₀N₄O₃S
MW: 348.4 g/mol

VQ-034368

Reference Standard

N-(Isopropylcarbamoyl)-4-(p-tolylamino)pyridine-3-sulfonamide chemical structure

N-(Isopropylcarbamoyl)-4-(p-tolylamino)pyridine-3-sulfonamide

CAS: 106944-63-2
Formula: C₁₆H₂₀N₄O₃S
MW: 348.4 g/mol

VQ-028470

Reference Standard

N-(Methoxycarbonyl)-L-valine chemical structure

N-(Methoxycarbonyl)-L-valine

CAS: 74761-42-5
Formula: C₇H₁₃NO₄
MW: 175.18 g/mol

VQ-029998

Reference Standard

N-(Methyl D3)benzosuccinimide chemical structure

N-(Methyl D3)benzosuccinimide

CAS: 1221168-47-3
Formula: C₉H₇NO₂
MW: 164.18 g/mol

VQ-041218

Reference Standard

N-(Methyl-d3)-N-Nitrosopiperazine chemical structure

N-(Methyl-d3)-N-Nitrosopiperazine

CAS: 1184974-41-1
Formula: C₅H₁₁N₃O
MW: 132.18 g/mol

VQ-041149

Reference Standard

N-(n-Butanesulfonyl)-O-[4-(4-pyridinyl)-butyl]-(S)-tyrosine chemical structure

N-(n-Butanesulfonyl)-O-[4-(4-pyridinyl)-butyl]-(S)-tyrosine

CAS: 149490-61-9
Formula: C₂₂H₃₀N₂O₅S
MW: 434.6 g/mol

VQ-028409

Reference Standard

N-(N6-Trifluoroacetyl-L-lysyl)-L-proline chemical structure

N-(N6-Trifluoroacetyl-L-lysyl)-L-proline

CAS: 103300-89-6
Formula: C₁₃H₂₀F₃N₃O₄
MW: 339.31 g/mol

VQ-032793

Reference Standard

N-(Oxiran-2-ylmethyl)propan-2-amine chemical structure

N-(Oxiran-2-ylmethyl)propan-2-amine

CAS: 6452-58-0
Formula: C₆H₁₃NO
MW: 115.17 g/mol

VQ-044556

Reference Standard

N-(p-Chlorobenzoyl)-p-anisidine chemical structure

N-(p-Chlorobenzoyl)-p-anisidine

CAS: 4018-82-0
Formula: C₁₄H₁₂ClNO₂
MW: 261.7 g/mol

VQ-022845

Reference Standard

N-(p-Toluenesulfonyl)-L-phenylalanine chemical structure

N-(p-Toluenesulfonyl)-L-phenylalanine

CAS: 13505-32-3
Formula: C₁₆H₁₇NO₄S
MW: 319.4 g/mol

VQ-035778

Reference Standard

N-(Pyridin-2-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide chemical structure

N-(Pyridin-2-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide

CAS: 2180911-32-2
Formula: C₁₈H₂₀BNO₄
MW: 325.2 g/mol

VQ-024121

Reference Standard

N-(Pyridin-2-yl)benzamide chemical structure

N-(Pyridin-2-yl)benzamide

CAS: 4589-12-2
Formula: C₁₂H₁₀N₂O
MW: 198.22 g/mol

VQ-035577

Reference Standard

N-(R)-Glycidyl Phthalimide chemical structure

N-(R)-Glycidyl Phthalimide

CAS: 181140-34-1
Formula: C₁₁H₉NO₃
MW: 203.19 g/mol

VQ-027148

Reference Standard

N-(tert-Butoxycarbonyl)-6-aminohexanoic Acid chemical structure

N-(tert-Butoxycarbonyl)-6-aminohexanoic Acid

CAS: 6404-29-1
Formula: C₁₁H₂₁NO₄
MW: 231.29 g/mol

VQ-038897

Reference Standard

N-(tert-Butyl)-3-((2-chloro-5-methylpyrimidin-4-yl)amino)benzenesulfonamide chemical structure

N-(tert-Butyl)-3-((2-chloro-5-methylpyrimidin-4-yl)amino)benzenesulfonamide

CAS: 936092-53-4
Formula: C₁₅H₁₉ClN₄O₂S
MW: 354.9 g/mol

VQ-035316

Reference Standard

N-(tert-Butyl)-N-nitrosoglycine (Mixture of Isomers) chemical structure

N-(tert-Butyl)-N-nitrosoglycine (Mixture of Isomers)

CAS: 6939-24-8
Formula: C₆H₁₂N₂O₃
MW: 160.17 g/mol

VQ-045376

Reference Standard

N-(Trifluoroacetyl)daunorubicin chemical structure

N-(Trifluoroacetyl)daunorubicin

CAS: 26388-52-3
Formula: C₂₉H₂₈F₃NO₁₁
MW: 623.5 g/mol

VQ-036590

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