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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

Alpha-Ergocryptinine chemical structure

Alpha-Ergocryptinine

CAS: 511-10-4
Formula: C₃₂H₄₁N₅O₅
MW: 575.7 g/mol

VQ-040877

Reference Standard

alpha-Ketoglutaric acid dimer impurity

alpha-Ketoglutaric acid dimer impurity

CAS: 5169-82-4
Formula: C₁₀H₁₄O₆
MW: 230.2 g/mol

VQ-041076

Reference Standard

Alpha-Lactose monohydrate chemical structure

Alpha-Lactose monohydrate

CAS: 5989-81-1
Formula: C₁₂H₂₄O₁₂
MW: 360.31 g/mol

VQ-032622

Reference Standard

alpha-Methyl-trans-cinnamaldehyde chemical structure

alpha-Methyl-trans-cinnamaldehyde

CAS: 101-39-3
Formula: C₁₀H₁₀O
MW: 146.19 g/mol

VQ-030506

Reference Standard

Alpha-Methyldopamine chemical structure

Alpha-Methyldopamine

CAS: 555-64-6
Formula: C₉H₁₃NO₂
MW: 167.2 g/mol

VQ-038373

Reference Standard

Alpha-Phenyl-2-piperidineacetic acid Hydrochloride chemical structure

Alpha-Phenyl-2-piperidineacetic acid Hydrochloride

CAS: 19395-40-5
Formula: C₁₃H₁₈ClNO₂
MW: 255.74 g/mol

VQ-035449

Reference Standard

Alpha-Terpinene chemical structure

Alpha-Terpinene

CAS: 99-86-5
Formula: C₁₀H₁₆
MW: 136.23 g/mol

VQ-034143

Reference Standard

Alpha-Yohimbine hydrochloride chemical structure

Alpha-Yohimbine hydrochloride

CAS: 6211-32-1
Formula: C₂₁H₂₇ClN₂O₃
MW: 390.9 g/mol

VQ-043652

Reference Standard

alpha,alpha,3,5-Tetramethyl-Benzeneacetonitrile chemical structure

alpha,alpha,3,5-Tetramethyl-Benzeneacetonitrile

CAS: 93748-07-3
Formula: C₁₂H₁₅N
MW: 173.25 g/mol

VQ-035734

Reference Standard

Alternariol-9-Methyl Ether chemical structure

Alternariol-9-Methyl Ether

CAS: 23452-05-3
Formula: C₁₅H₁₂O₅
MW: 272.25 g/mol

VQ-045180

Reference Standard

Althiazide chemical structure

CAS: 5588-16-9
Formula: C₁₁H₁₄ClN₃O₄S₃
MW: 383.9 g/mol

VQ-020774

Reference Standard

Altiratinib chemical structure

CAS: 1345847-93-9
Formula: C₂₆H₂₁F₃N₄O₄
MW: 510.5 g/mol

VQ-045241

Reference Standard

Altrenogest chemical structure

CAS: 850-52-2
Formula: C₂₁H₂₆O₂
MW: 310.4 g/mol

VQ-021523

Reference Standard

Altretamine chloro keto analog chemical structure

Altretamine chloro keto analog

CAS: 63537-70-2
Formula: C₅H₇ClN₄O
MW: 174.59 g/mol

VQ-044124

Reference Standard

Altretamine diketo analog chemical structure

Altretamine diketo analog

CAS: 13704-43-3
Formula: C₅H₈N₄O₂
MW: 156.14 g/mol

VQ-044123

Reference Standard

Altretamine keto analog chemical structure

Altretamine keto analog

CAS: 33979-07-6
Formula: C₇H₁₃N₅O
MW: 183.21 g/mol

VQ-044125

Reference Standard

Alvespimycin Hydrochloride chemical structure

Alvespimycin Hydrochloride

CAS: 467214-21-7
Formula: C₃₂H₄₉ClN₄O₈
MW: 653.2 g/mol

VQ-044526

Reference Standard

Ambrisentan Ethyl Ester

Ambrisentan Ethyl Ester

CAS: 1349854-31-4
Formula: C₂₄H₂₆N₂O₄
MW: 406.47 g/mol

VQ-021533

Reference Standard

Ambrisentan Impurity 1

Ambrisentan Impurity 1

CAS: 59209-45-9
Formula: C₁₀H₂₁ClN₂O
MW: 220.74 g/mol

VQ-047376

Reference Standard

Ambrisentan Impurity E chemical structure

Ambrisentan Impurity E

CAS: 1312092-82-2
Formula: C₂₁H₁₈N₂O₃
MW: 346.4 g/mol

VQ-021532

Reference Standard

Ambrisentan Methyl Ester chemical structure

Ambrisentan Methyl Ester

CAS: 1106685-61-3
Formula: C₂₃H₂₄N₂O₄
MW: 392.4 g/mol

VQ-020781

Reference Standard

Ambrisentan Vinyloxy Impurity chemical structure

Ambrisentan Vinyloxy Impurity

CAS: 1639429-81-4
Formula: C₂₀H₁₈N₂O
MW: 302.4 g/mol

VQ-021529

Reference Standard

Ambroxol Cycloimine Impurity chemical structure

Ambroxol Cycloimine Impurity

CAS: 2088879-81-4
Formula: C₁₄H₁₆Br₂N₂O
MW: 388.1 g/mol

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Reference Standard

Ambroxol Cycloimine Impurity (Hydrochloride) chemical structure

Ambroxol Cycloimine Impurity (Hydrochloride)

CAS: 2356152-56-0
Formula: C₁₄H₁₇Br₂ClN₂O
MW: 424.56 g/mol

VQ-004362

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