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Impurities & Reference Standards

API Impurities

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

14,098products

1,516in stock

COA + SDSwith every lot

Reference Standard

Isoproterenone chemical structure

CAS: 121-28-8
Formula: C₁₁H₁₅NO₃
MW: 209.24 g/mol

VQ-028973

Reference Standard

Isoquinoline, 1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2- methyl chemical structure

Isoquinoline, 1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2- methyl

CAS: 1699-51-0
Formula: C₂₁H₂₇NO₄
MW: 357.4 g/mol

VQ-024424

Reference Standard

Isoscopine chemical structure

CAS: 498-46-4
Formula: C₈H₁₃NO₂
MW: 155.19 g/mol

VQ-042562

Reference Standard

Isosilybin A chemical structure

CAS: 142796-21-2
Formula: C₂₅H₂₂O₁₀
MW: 482.4 g/mol

VQ-037754

Reference Standard

Isosilybin B chemical structure

CAS: 142796-22-3
Formula: C₂₅H₂₂O₁₀
MW: 482.4 g/mol

VQ-037755

Reference Standard

Isosorbide 2-acetate 5-nitrate chemical structure

Isosorbide 2-acetate 5-nitrate

CAS: 39813-48-4
Formula: C₈H₁₁NO₇
MW: 233.18 g/mol

VQ-026242

Reference Standard

Isosorbide Dinitrate chemical structure

Isosorbide Dinitrate

CAS: 87-33-2
Formula: C₆H₈N₂O₈
MW: 236.14 g/mol

VQ-026241

Reference Standard

Isosorbide Impurity 1 chemical structure

Isosorbide Impurity 1

CAS: 121693-37-6
Formula: C₈H₁₄O₄
MW: 174.19 g/mol

VQ-048713

Reference Standard

Isosorbide-5-mononitrate chemical structure

Isosorbide-5-mononitrate

CAS: 16051-77-7
Formula: C₆H₉NO₆
MW: 191.14 g/mol

VQ-031278

Reference Standard

Isothipendyl Hydrochloride chemical structure

Isothipendyl Hydrochloride

CAS: 1225-60-1
Formula: C₁₆H₂₀ClN₃S
MW: 321.9 g/mol

VQ-031284

Reference Standard

Isotrazodone chemical structure

CAS: 157072-18-9
Formula: C₁₉H₂₃ClN₅O⁺
MW: 372.9 g/mol

VQ-034402

Reference Standard

Isotretinoin Impurity A chemical structure

Isotretinoin Impurity A

CAS: 302-79-4
Formula: C₂₀H₂₈O₂
MW: 300.4 g/mol

In stock

Reference Standard

Isouridine chemical structure

CAS: 6745-33-1
Formula: C₉H₁₂N₂O₆
MW: 244.2 g/mol

VQ-042763

Reference Standard

Isovitamin D3 chemical structure

CAS: 42607-12-5
Formula: C₂₇H₄₄O
MW: 384.6 g/mol

VQ-043157

Reference Standard

Isovitexin chemical structure

CAS: 38953-85-4
Formula: C₂₁H₂₀O₁₀
MW: 432.4 g/mol

VQ-032746

Reference Standard

Isoxepac chemical structure

CAS: 55453-87-7
Formula: C₁₆H₁₂O₄
MW: 268.26 g/mol

VQ-023333

Reference Standard

Itopride Impurity 12 chemical structure

Itopride Impurity 12

CAS: 20059-73-8
Formula: C₁₁H₁₈N₂O
MW: 194.27 g/mol

In stock

Reference Standard

Itraconazole 4-Triazolyl Isomer

Itraconazole 4-Triazolyl Isomer

CAS: 1427177-65-8
Formula: C₃₅H₃₈Cl₂N₈O₄
MW: 705.63 g/mol

VQ-031308

Reference Standard

Itraconazole Di Formyl Impurity

Itraconazole Di Formyl Impurity

Formula: C₃₅H₃₆Cl₂N₈O₆
MW: 735.62 g/mol

In stock

Reference Standard

Itraconazole Hydroxy Isopropyltriazolone Impurity chemical structure

Itraconazole Hydroxy Isopropyltriazolone Impurity

CAS: 89848-19-1
Formula: C₂₁H₂₅N₅O₂
MW: 379.5 g/mol

VQ-044387

Reference Standard

Itraconazole Impurity 28 chemical structure

Itraconazole Impurity 28

CAS: 103661-14-9
Formula: C₁₄H₁₅Cl₂N₃O₅S
MW: 408.3 g/mol

VQ-037768

Reference Standard

Itraconazole Impurity 31

Itraconazole Impurity 31

CAS: 88710-27-4
Formula: C₁₉H₁₈Cl₂N₄O₃
MW: 421.28 g/mol

VQ-048721

Reference Standard

Itraconazole Impurity 7 chemical structure

Itraconazole Impurity 7

CAS: 115897-54-6
Formula: C₁₄H₁₅Cl₂N₃O₅S
MW: 408.3 g/mol

VQ-037767

Reference Standard

Itraconazole Methoxy Butyltriazolone Impurity chemical structure

Itraconazole Methoxy Butyltriazolone Impurity

CAS: 89848-15-7
Formula: C₂₃H₂₉N₅O₂
MW: 407.5 g/mol

VQ-037771

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