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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

rac Ambrisentan chemical structure

rac Ambrisentan

CAS: 713516-99-5
Formula: C₂₂H₂₂N₂O₄
MW: 378.4 g/mol

VQ-028856

Reference Standard

rac Ambrisentan Methyl Ester chemical structure

rac Ambrisentan Methyl Ester

CAS: 1240470-84-1
Formula: C₂₃H₂₄N₂O₄
MW: 392.4 g/mol

VQ-021534

Reference Standard

rac Atomoxetine Hydrochloride chemical structure

rac Atomoxetine Hydrochloride

CAS: 82857-40-7
Formula: C₁₇H₂₂ClNO
MW: 291.8 g/mol

VQ-028891

Reference Standard

rac Benidipine hydrochloride chemical structure

rac Benidipine hydrochloride

CAS: 91599-74-5
Formula: C₂₈H₃₂ClN₃O₆
MW: 542 g/mol

VQ-024533

Reference Standard

rac Bepotastine chemical structure

rac Bepotastine

CAS: 1070505-53-1
Formula: C₂₁H₂₅ClN₂O₃
MW: 388.9 g/mol

VQ-035946

Reference Standard

Rac Brivaracetam Carboxylic acid chemical structure

Rac Brivaracetam Carboxylic acid

CAS: 2663706-07-6
Formula: C₁₁H₁₉NO₃
MW: 213.27 g/mol

VQ-029517

Reference Standard

rac cis-9,10-Epoxystearic Acid chemical structure

rac cis-9,10-Epoxystearic Acid

CAS: 24560-98-3
Formula: C₁₈H₃₄O₃
MW: 298.5 g/mol

VQ-040203

Reference Standard

Rac Crizotinib chemical structure

CAS: 877400-66-3
Formula: C₂₁H₂₂Cl₂FN₅O
MW: 450.3 g/mol

VQ-036448

Reference Standard

rac Desfluoro Citalopram Oxalate chemical structure

rac Desfluoro Citalopram Oxalate

CAS: 1093072-86-6
Formula: C₂₂H₂₄N₂O₅
MW: 396.4 g/mol

VQ-024997

Reference Standard

rac Duloxetine 3-Thiophene Isomer chemical structure

rac Duloxetine 3-Thiophene Isomer

CAS: 116817-27-7
Formula: C₁₈H₁₉NOS
MW: 297.4 g/mol

VQ-036856

Reference Standard

rac Epinephrine chemical structure

rac Epinephrine

CAS: 329-65-7
Formula: C₉H₁₃NO₃
MW: 183.2 g/mol

VQ-026950

Reference Standard

rac Epinephrine-1-Sulfuronthiate chemical structure

rac Epinephrine-1-Sulfuronthiate

CAS: 859066-02-7
Formula: C₉H₁₃NO₅S₂
MW: 279.3 g/mol

VQ-029041

Reference Standard

rac Guaifenesin Cyclic Carbonate chemical structure

rac Guaifenesin Cyclic Carbonate

CAS: 2049-21-0
Formula: C₁₁H₁₂O₅
MW: 224.21 g/mol

VQ-031820

Reference Standard

Rac Maralixibat Chloride

Rac Maralixibat Chloride

CAS: 280105-80-8
Formula: C₄₀H₅₆N₃O₄S.Cl
MW: 710.41 g/mol

VQ-049008

Reference Standard

rac N-Benzyl Nebivolol chemical structure

rac N-Benzyl Nebivolol

CAS: 929706-85-4
Formula: C₂₉H₃₁F₂NO₄
MW: 495.6 g/mol

VQ-023220

Reference Standard

rac N-Methyl Atomoxetine Oxalate chemical structure

rac N-Methyl Atomoxetine Oxalate

CAS: 107688-86-8
Formula: C₂₀H₂₅NO₅
MW: 359.4 g/mol

VQ-044676

Reference Standard

rac N-Propyl-2-cyanimidopyrrolidine-5-acetic Acid chemical structure

rac N-Propyl-2-cyanimidopyrrolidine-5-acetic Acid

CAS: 1246833-75-9
Formula: C₁₀H₁₅N₃O₂
MW: 209.24 g/mol

VQ-033272

Reference Standard

rac Naproxen 2-Propyl Ester chemical structure

rac Naproxen 2-Propyl Ester

CAS: 68641-85-0
Formula: C₁₇H₂₀O₃
MW: 272.34 g/mol

VQ-038555

Reference Standard

Rac Nebivolol Hydrochloride chemical structure

Rac Nebivolol Hydrochloride

CAS: 169293-50-9
Formula: C₂₂H₂₆ClF₂NO₄
MW: 441.9 g/mol

VQ-049201

Reference Standard

rac Norphenylephrine Hydrochloride chemical structure

rac Norphenylephrine Hydrochloride

CAS: 4779-94-6
Formula: C₈H₁₂ClNO₂
MW: 189.64 g/mol

VQ-025352

Reference Standard

rac Ramelteon chemical structure

CAS: 196597-17-8
Formula: C₁₆H₂₁NO₂
MW: 259.34 g/mol

VQ-044522

Reference Standard

rac Terpinen-4-ol chemical structure

rac Terpinen-4-ol

CAS: 562-74-3
Formula: C₁₀H₁₈O
MW: 154.25 g/mol

VQ-032512

Reference Standard

rac threo-Dihydro Bupropion chemical structure

rac threo-Dihydro Bupropion

CAS: 92264-82-9
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

VQ-028860

Reference Standard

rac Threo-Dihydro Bupropion Hydrochloride chemical structure

rac Threo-Dihydro Bupropion Hydrochloride

CAS: 1396889-62-5
Formula: C₁₃H₂₁Cl₂NO
MW: 278.21 g/mol

VQ-044726

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