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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

Benzyl Sildenafil chemical structure

Benzyl Sildenafil

CAS: 1446089-82-2
Formula: C₂₈H₃₄N₆O₄S
MW: 550.7 g/mol

VQ-044669

Reference Standard

Benzyl Silodosin chemical structure

Benzyl Silodosin

CAS: 175870-40-3
Formula: C₃₂H₃₈F₃N₃O₄
MW: 585.7 g/mol

VQ-033848

Reference Standard

Benzyl tert-butyl ((1S,2R,4S)-4-(dimethylcarbamoyl)cyclohexane-1,2-diyl)dicarbamate chemical structure

Benzyl tert-butyl ((1S,2R,4S)-4-(dimethylcarbamoyl)cyclohexane-1,2-diyl)dicarbamate

CAS: 365998-35-2
Formula: C₂₂H₃₃N₃O₅
MW: 419.5 g/mol

VQ-030361

Reference Standard

Benzyl Tosylate chemical structure

Benzyl Tosylate

CAS: 1024-41-5
Formula: C₁₄H₁₄O₃S
MW: 262.33 g/mol

VQ-023385

Reference Standard

Benzyl(S)-2-(8-fluoro-3-(2- methoxy-5- (trifluoromethyl)phenyl)-2- (4-(3-methoxy phenyl)piperazin-1-yl)-3,4- dihydro-quinazolin-4- yl)acetate chemical structure

Benzyl(S)-2-(8-fluoro-3-(2- methoxy-5- (trifluoromethyl)phenyl)-2- (4-(3-methoxy phenyl)piperazin-1-yl)-3,4- dihydro-quinazolin-4- yl)acetate

CAS: 2758792-75-3
Formula: C₃₆H₃₄F₄N₄O₄
MW: 662.7 g/mol

VQ-045144

Reference Standard

Benzylammonium chloride chemical structure

Benzylammonium chloride

CAS: 3287-99-8
Formula: C₇H₁₀ClN
MW: 143.61 g/mol

VQ-031408

Reference Standard

Benzyldimethyldecylammonium chloride chemical structure

Benzyldimethyldecylammonium chloride

CAS: 965-32-2
Formula: C₁₉H₃₄ClN
MW: 311.9 g/mol

VQ-039304

Reference Standard

Benzyldimethyltetradecylammonium Chloride Dihydrate chemical structure

Benzyldimethyltetradecylammonium Chloride Dihydrate

CAS: 147228-81-7
Formula: C₂₃H₄₆ClNO₂
MW: 404.1 g/mol

VQ-043000

Reference Standard

Benzylpenicillin chemical structure

Benzylpenicillin

CAS: 61-33-6
Formula: C₁₆H₁₈N₂O₄S
MW: 334.4 g/mol

VQ-024660

Reference Standard

Benzylpenicillin Clemizole chemical structure

Benzylpenicillin Clemizole

CAS: 6011-39-8
Formula: C₃₅H₃₈ClN₅O₄S
MW: 660.2 g/mol

VQ-033097

Reference Standard

Bepotastine Besylate Racemic Mixture chemical structure

Bepotastine Besylate Racemic Mixture

CAS: 1415692-17-9
Formula: C₂₇H₃₁ClN₂O₆S
MW: 547.1 g/mol

VQ-035945

Reference Standard

Bepotastine Ethyl ester chemical structure

Bepotastine Ethyl ester

CAS: 190730-39-3
Formula: C₂₃H₂₉ClN₂O₃
MW: 416.9 g/mol

VQ-020923

Reference Standard

Bepotastine Impurity 4 chemical structure

Bepotastine Impurity 4

CAS: 207726-35-0
Formula: C₂₀H₂₃ClN₂O₃
MW: 374.9 g/mol

VQ-045289

Reference Standard

Bepotastine Isopropyl ester chemical structure

Bepotastine Isopropyl ester

CAS: 1807607-93-7
Formula: C₂₄H₃₁ClN₂O₃
MW: 431 g/mol

VQ-020924

Reference Standard

Bepotastine Methyl Ester

Bepotastine Methyl Ester

CAS: 1415566-38-9
Formula: C₂₂H₂₇ClN₂O₃
MW: 402.9 g/mol

VQ-045457

Reference Standard

Bepotastine N-Butyl Ester chemical structure

Bepotastine N-Butyl Ester

CAS: 1807606-59-2
Formula: C₂₅H₃₃ClN₂O₃
MW: 445 g/mol

VQ-020925

Reference Standard

Beraprost Impurity 8

Beraprost Impurity 8

CAS: 674796-22-6
Formula: C₂₇H₅₄OSiSn
MW: 541.5 g/mol

VQ-044273

Reference Standard

Beraprost Methyl Ester chemical structure

Beraprost Methyl Ester

CAS: 223556-65-8
Formula: C₂₅H₃₂O₅
MW: 412.5 g/mol

VQ-045459

Reference Standard

Bergapten chemical structure

CAS: 484-20-8
Formula: C₁₂H₈O₄
MW: 216.19 g/mol

VQ-029407

Reference Standard

Bergenin chemical structure

CAS: 477-90-7
Formula: C₁₄H₁₆O₉
MW: 328.27 g/mol

VQ-039251

Reference Standard

Besifloxacin 8-Dechloro Impurity chemical structure

Besifloxacin 8-Dechloro Impurity

CAS: 141388-69-4
Formula: C₁₉H₂₂FN₃O₃
MW: 359.4 g/mol

VQ-021795

Reference Standard

Besifloxacin Impurity A chemical structure

Besifloxacin Impurity A

CAS: 141388-77-4
Formula: C₁₉H₂₁ClFN₃O₃
MW: 393.8 g/mol

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Reference Standard

Besifloxacin Impurity A (Hydrochloride) chemical structure

Besifloxacin Impurity A (Hydrochloride)

CAS: 1398566-42-1
Formula: C₁₉H₂₂Cl₂FN₃O₃
MW: 430.3 g/mol

VQ-004521

Reference Standard

Besifloxacin Impurity B chemical structure

Besifloxacin Impurity B

CAS: 101987-89-7
Formula: C₁₃H₈ClF₂NO₃
MW: 299.65 g/mol

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