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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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1,516in stock

COA + SDSwith every lot

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-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-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

Reference Standard

N-Deacetyl-N-Formyl Agomelatine chemical structure

N-Deacetyl-N-Formyl Agomelatine

CAS: 138113-05-0
Formula: C₁₄H₁₅NO₂
MW: 229.27 g/mol

VQ-024170

Reference Standard

N-Debenzoyl-N-propanoyl-10-deacetyl Paclitaxel chemical structure

N-Debenzoyl-N-propanoyl-10-deacetyl Paclitaxel

CAS: 173101-47-8
Formula: C₄₂H₅₁NO₁₃
MW: 777.9 g/mol

VQ-033028

Reference Standard

N-Debenzoyl-N-Propanoyl-10-Deacetylpaclitaxel chemical structure

N-Debenzoyl-N-Propanoyl-10-Deacetylpaclitaxel

CAS: 173101-59-2
Formula: C₄₁H₄₉NO₁₃
MW: 763.8 g/mol

VQ-033027

Reference Standard

N-Debenzoylpaclitaxel 1-Oxopentyl Amino Ester chemical structure

N-Debenzoylpaclitaxel 1-Oxopentyl Amino Ester

CAS: 173101-55-8
Formula: C₄₅H₅₅NO₁₄
MW: 833.9 g/mol

VQ-041299

Reference Standard

N-Dechloroethyl Cyclophosphamide chemical structure

N-Dechloroethyl Cyclophosphamide

CAS: 36761-83-8
Formula: C₅H₁₂ClN₂O₂P
MW: 198.59 g/mol

VQ-029956

Reference Standard

N-Deethyl Dorzolamide Hydrochloride chemical structure

N-Deethyl Dorzolamide Hydrochloride

CAS: 164455-27-0
Formula: C₈H₁₃ClN₂O₄S₃
MW: 332.9 g/mol

VQ-030292

Reference Standard

N-Depiperidin-3-amine Linagliptin Dimer chemical structure

N-Depiperidin-3-amine Linagliptin Dimer

CAS: 2253964-98-4
Formula: C₄₅H₄₄N₁₄O₄
MW: 844.9 g/mol

In stock

Reference Standard

N-Depropylpropafenone

N-Depropylpropafenone

CAS: 86383-22-4
Formula: C₁₈H₂₁NO₃ : C₂H₂O₄
MW: 688.77 g/mol

VQ-045122

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