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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

Heptanoic Acid chemical structure

CAS: 111-14-8
Formula: C₇H₁₄O₂
MW: 130.18 g/mol

VQ-026055

Reference Standard

Herniarin chemical structure

CAS: 531-59-9
Formula: C₁₀H₈O₃
MW: 176.17 g/mol

VQ-040099

Reference Standard

Hesperetin chemical structure

CAS: 520-33-2
Formula: C₁₆H₁₄O₆
MW: 302.28 g/mol

VQ-022403

Reference Standard

Hesperetin 7-O-Rutinoside chemical structure

Hesperetin 7-O-Rutinoside

CAS: 64726-90-5
Formula: C₂₈H₃₄O₁₅
MW: 610.6 g/mol

VQ-031059

Reference Standard

Hesperetin 7-O-β-D-glucopyranoside chemical structure

Hesperetin 7-O-β-D-glucopyranoside

CAS: 906320-94-3
Formula: C₂₂H₂₄O₁₁
MW: 464.4 g/mol

VQ-035292

Reference Standard

Hesperidin Methylchalcone chemical structure

Hesperidin Methylchalcone

CAS: 24292-52-2
Formula: C₂₉H₃₆O₁₅
MW: 624.6 g/mol

VQ-032965

Reference Standard

Hexahydro-4,7-methanoisobenzofuran-1,3-dione chemical structure

Hexahydro-4,7-methanoisobenzofuran-1,3-dione

CAS: 17812-27-0
Formula: C₉H₁₀O₃
MW: 166.17 g/mol

VQ-031691

Reference Standard

Hexahydrophenyl Cinacalcet chemical structure

Hexahydrophenyl Cinacalcet

CAS: 1271930-12-1
Formula: C₂₂H₂₈F₃N
MW: 363.5 g/mol

VQ-022186

Reference Standard

Hexamethonium Bromide chemical structure

Hexamethonium Bromide

CAS: 55-97-0
Formula: C₁₂H₃₀Br₂N₂
MW: 362.19 g/mol

VQ-039808

Reference Standard

Hexanedioic Acid Mono-(2-carboxyphenyl) Ester chemical structure

Hexanedioic Acid Mono-(2-carboxyphenyl) Ester

CAS: 863985-44-8
Formula: C₁₃H₁₄O₆
MW: 266.25 g/mol

VQ-035593

Reference Standard

Histamine glutarimide chemical structure

Histamine glutarimide

CAS: 1464897-15-1
Formula: C₁₀H₁₃N₃O₂
MW: 207.23 g/mol

VQ-027287

Reference Standard

Histamine Glutarimide Dimer Impurity

Histamine Glutarimide Dimer Impurity

CAS: 154545-39-8
Formula: C₁₅H₂₂N₆O₂
MW: 318.4 g/mol

VQ-035393

Reference Standard

Homatropine Methylbromide chemical structure

Homatropine Methylbromide

CAS: 80-49-9
Formula: C₁₇H₂₄BrNO₃
MW: 370.3 g/mol

VQ-031067

Reference Standard

Homo Brassinolide chemical structure

Homo Brassinolide

CAS: 80483-89-2
Formula: C₂₉H₅₀O₆
MW: 494.7 g/mol

VQ-024629

Reference Standard

Homobrassinolide chemical structure

Homobrassinolide

CAS: 74174-44-0
Formula: C₂₉H₅₀O₆
MW: 494.7 g/mol

VQ-024630

Reference Standard

Homocapsaicin I chemical structure

Homocapsaicin I

CAS: 58493-48-4
Formula: C₁₉H₂₉NO₃
MW: 319.4 g/mol

VQ-024758

Reference Standard

Hopantenic Acid chemical structure

Hopantenic Acid

CAS: 18679-90-8
Formula: C₁₀H₁₉NO₅
MW: 233.26 g/mol

VQ-043136

Reference Standard

Hydantoic Acid chemical structure

CAS: 462-60-2
Formula: C₃H₆N₂O₃
MW: 118.09 g/mol

VQ-031070

Reference Standard

Hydralazine 6-Chlorophthalazinone Impurity chemical structure

Hydralazine 6-Chlorophthalazinone Impurity

CAS: 57835-96-8
Formula: C₈H₅ClN₂O
MW: 180.59 g/mol

VQ-037587

Reference Standard

Hydralazine 7-Chloro-1-hydrazinyl Impurity chemical structure

Hydralazine 7-Chloro-1-hydrazinyl Impurity

CAS: 59283-60-2
Formula: C₈H₇ClN₄
MW: 194.62 g/mol

VQ-031074

Reference Standard

Hydralazine Dimer Impurity chemical structure

Hydralazine Dimer Impurity

CAS: 24030-07-7
Formula: C₁₆H₁₂N₆
MW: 288.31 g/mol

VQ-022794

Reference Standard

Hydralazine Impurity A chemical structure

Hydralazine Impurity A

CAS: 5784-45-2
Formula: C₈H₅ClN₂
MW: 164.59 g/mol

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Reference Standard

Hydralazine Methoxy Impurity chemical structure

Hydralazine Methoxy Impurity

CAS: 24953-56-8
Formula: C₉H₈N₂O
MW: 160.17 g/mol

VQ-031071

Reference Standard

Hydralazine Triphthalazine Impurity

Hydralazine Triphthalazine Impurity

CAS: 103429-73-8
Formula: C₂₄H₁₆N₈
MW: 416.44 g/mol

VQ-022795

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