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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

N-Methyltetrafluorophthalimide chemical structure

N-Methyltetrafluorophthalimide

CAS: 33795-85-6
Formula: C₉H₃F₄NO₂
MW: 233.12 g/mol

VQ-038508

Reference Standard

N-Methylvancomycin chemical structure

N-Methylvancomycin

CAS: 99759-13-4
Formula: C₆₇H₇₇Cl₂N₉O₂₄
MW: 1463.3 g/mol

VQ-023979

Reference Standard

N-Nitro-1,2,3,4-tetradehydro Argatroban chemical structure

N-Nitro-1,2,3,4-tetradehydro Argatroban

CAS: 74874-10-5
Formula: C₂₃H₃₁N₇O₇S
MW: 549.6 g/mol

VQ-021613

Reference Standard

N-Nitro-1,2,3,4-tetradehydro Argatroban Ethyl Ester chemical structure

N-Nitro-1,2,3,4-tetradehydro Argatroban Ethyl Ester

CAS: 74874-09-2
Formula: C₂₅H₃₅N₇O₇S
MW: 577.7 g/mol

VQ-024359

Reference Standard

N-Nitrosamine Tranexamic Acid Dimer Impurity (Rotamers) chemical structure

N-Nitrosamine Tranexamic Acid Dimer Impurity (Rotamers)

Formula: C₁₆H₂₆N₂O₅
MW: 326.39 g/mol

In stock

Reference Standard

N-Octylpyridin-4-amine chemical structure

N-Octylpyridin-4-amine

CAS: 64690-19-3
Formula: C₁₃H₂₂N₂
MW: 206.33 g/mol

VQ-027076

Reference Standard

N-Phenethylacetamide chemical structure

N-Phenethylacetamide

CAS: 877-95-2
Formula: C₁₀H₁₃NO
MW: 163.22 g/mol

VQ-032605

Reference Standard

N-Phenethylbenzamide chemical structure

N-Phenethylbenzamide

CAS: 3278-14-6
Formula: C₁₅H₁₅NO
MW: 225.28 g/mol

VQ-028082

Reference Standard

N-Phenethylcyclohexanecarboxamide chemical structure

N-Phenethylcyclohexanecarboxamide

CAS: 53182-00-6
Formula: C₁₅H₂₁NO
MW: 231.33 g/mol

VQ-043515

Reference Standard

N-Phenoxycarbonyl Paroxetine chemical structure

N-Phenoxycarbonyl Paroxetine

CAS: 253768-88-6
Formula: C₂₆H₂₄FNO₅
MW: 449.5 g/mol

VQ-041354

Reference Standard

N-Phenoxycarbonyl-L-valine chemical structure

N-Phenoxycarbonyl-L-valine

CAS: 126147-70-4
Formula: C₁₂H₁₅NO₄
MW: 237.25 g/mol

VQ-032696

Reference Standard

N-Phenyl-4-(trifluoromethyl)aniline chemical structure

N-Phenyl-4-(trifluoromethyl)aniline

CAS: 53451-87-9
Formula: C₁₃H₁₀F₃N
MW: 237.22 g/mol

VQ-048312

Reference Standard

N-Phenyldiethanolamine chemical structure

N-Phenyldiethanolamine

CAS: 120-07-0
Formula: C₁₀H₁₅NO₂
MW: 181.23 g/mol

VQ-032671

Reference Standard

N-Phenylglycyl Cefadroxil chemical structure

N-Phenylglycyl Cefadroxil

CAS: 147103-95-5
Formula: C₂₄H₂₄N₄O₇S
MW: 512.5 g/mol

VQ-022056

Reference Standard

N-Phenylpyridin-2(1H)-one chemical structure

N-Phenylpyridin-2(1H)-one

CAS: 13131-02-7
Formula: C₁₁H₉NO
MW: 171.19 g/mol

VQ-035049

Reference Standard

N-Phthalimido 4-Nitro-L-phenylalanine Methyl Ester chemical structure

N-Phthalimido 4-Nitro-L-phenylalanine Methyl Ester

CAS: 74743-22-9
Formula: C₁₈H₁₄N₂O₆
MW: 354.3 g/mol

VQ-044618

Reference Standard

N-Piperacillinyl Ampicillin chemical structure

N-Piperacillinyl Ampicillin

CAS: 65772-67-0
Formula: C₃₉H₄₄N₈O₁₀S₂
MW: 848.9 g/mol

VQ-033205

Reference Standard

N-Pivaloyl Amoxicillin chemical structure

N-Pivaloyl Amoxicillin

CAS: 1313237-94-3
Formula: C₂₁H₂₇N₃O₆S
MW: 449.5 g/mol

VQ-021574

Reference Standard

N-Pivaly-Cefditoren Pivoxil chemical structure

N-Pivaly-Cefditoren Pivoxil

CAS: 878002-84-7
Formula: C₃₀H₃₆N₆O₈S₃
MW: 704.8 g/mol

VQ-029689

Reference Standard

N-Propanoyl Nintedanib

N-Propanoyl Nintedanib

CAS: 2097505-01-4
Formula: C₃₄H₃₇N₅O₅
MW: 595.7 g/mol

VQ-032173

Reference Standard

N-Propionyl-L-cysteine chemical structure

N-Propionyl-L-cysteine

CAS: 2885-79-2
Formula: C₆H₁₁NO₃S
MW: 177.22 g/mol

VQ-043846

Reference Standard

N-Propyl cyclooct-2-en-1-amine

N-Propyl cyclooct-2-en-1-amine

CAS: 1704413-75-1
Formula: C₁₁H₂₁N
MW: 167.29 g/mol

VQ-040249

Reference Standard

N-Psi-2,2,4,6,7-pentamethyldihydrobenzofuran-5-ylsulfonyl-D-arginine chemical structure

N-Psi-2,2,4,6,7-pentamethyldihydrobenzofuran-5-ylsulfonyl-D-arginine

CAS: 200116-81-0
Formula: C₁₉H₃₀N₄O₅S
MW: 426.5 g/mol

VQ-037894

Reference Standard

N-sec-Butyl-3,4-dimethyl-2,6-dinitroaniline chemical structure

N-sec-Butyl-3,4-dimethyl-2,6-dinitroaniline

CAS: 40318-45-4
Formula: C₁₂H₁₇N₃O₄
MW: 267.28 g/mol

VQ-035217

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