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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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COA + SDSwith every lot

Reference Standard

Azilsartan Impurity 36

Azilsartan Impurity 36

CAS: 1883681-13-7
Formula: C₁₄H₁₃BrN₂O
MW: 305.17 g/mol

VQ-047515

Reference Standard

Azilsartan Impurity 47 chemical structure

Azilsartan Impurity 47

CAS: 147404-12-4
Formula: C₂₅H₂₀N₄O₅
MW: 456.4 g/mol

VQ-047517

Reference Standard

Azilsartan Impurity 7 chemical structure

Azilsartan Impurity 7

CAS: 1586011-04-2
Formula: C₂₆H₂₅N₃O₄
MW: 443.5 g/mol

VQ-047518

Reference Standard

Azilsartan Impurity 997 (Acylated MHA) chemical structure

Azilsartan Impurity 997 (Acylated MHA)

CAS: 147404-82-8
Formula: C₂₈H₂₈N₄O₆
MW: 516.5 g/mol

VQ-035898

Reference Standard

Azilsartan Impurity A chemical structure

Azilsartan Impurity A

CAS: 147404-76-0
Formula: C₂₅H₂₃N₃O₄
MW: 429.5 g/mol

In stock

Reference Standard

Azilsartan Impurity A (n-1)

Azilsartan Impurity A (n-1)

Formula: C₂₆H₂₅N₃O₂
MW: 411.5 g/mol

In stock

Reference Standard

Azilsartan Impurity I chemical structure

Azilsartan Impurity I

CAS: 139481-33-7
Formula: C₂₃H₁₇N₃O₃
MW: 383.4 g/mol

VQ-021715

Reference Standard

Azilsartan Impurity J chemical structure

Azilsartan Impurity J

CAS: 1403474-78-1
Formula: C₂₄H₁₈N₄O₅
MW: 442.4 g/mol

VQ-021713

Reference Standard

Azilsartan Medoxomil Dimer Impurity chemical structure

Azilsartan Medoxomil Dimer Impurity

CAS: 1417576-04-5
Formula: C₅₄H₄₂N₈O₁₀
MW: 963 g/mol

VQ-035897

Reference Standard

Azilsartan Medoxomil Impurity 4 chemical structure

Azilsartan Medoxomil Impurity 4

CAS: 1800532-35-7
Formula: C₂₇H₂₀N₄O₆
MW: 496.5 g/mol

VQ-035896

Reference Standard

Azilsartan Methyl Ester chemical structure

Azilsartan Methyl Ester

CAS: 147403-52-9
Formula: C₂₆H₂₂N₄O₅
MW: 470.5 g/mol

VQ-021709

Reference Standard

Aziridin-1-ylphosphonothioic O,S-acid

Aziridin-1-ylphosphonothioic O,S-acid

CAS: 6540-08-5
Formula: C₂H₆NO₂PS
MW: 139.11 g/mol

VQ-043936

Reference Standard

Azithromycin - Impurity E chemical structure

Azithromycin - Impurity E

CAS: 612069-27-9
Formula: C₃₆H₆₈N₂O₁₂
MW: 720.9 g/mol

VQ-020875

Reference Standard

Azithromycin - Impurity F chemical structure

Azithromycin - Impurity F

CAS: 612069-28-0
Formula: C₃₈H₇₀N₂O₁₃
MW: 763 g/mol

VQ-020876

Reference Standard

Azithromycin - Impurity H chemical structure

Azithromycin - Impurity H

CAS: 612069-30-4
Formula: C₄₅H₇₇N₃O₁₅S
MW: 932.2 g/mol

VQ-020877

Reference Standard

Azithromycin N-Ethyl chemical structure

Azithromycin N-Ethyl

CAS: 92594-45-1
Formula: C₃₉H₇₄N₂O₁₂
MW: 763 g/mol

VQ-021719

Reference Standard

Azobenzene-4,4'-dicarboxylic Acid chemical structure

Azobenzene-4,4'-dicarboxylic Acid

CAS: 586-91-4
Formula: C₁₄H₁₀N₂O₄
MW: 270.24 g/mol

VQ-030105

Reference Standard

Aztreonam Amide chemical structure

Aztreonam Amide

CAS: 1219444-93-5
Formula: C₁₃H₂₀N₆O₈S₂
MW: 452.5 g/mol

VQ-020884

Reference Standard

Aztreonam Ethyl Ester chemical structure

Aztreonam Ethyl Ester

CAS: 102579-57-7
Formula: C₁₅H₂₁N₅O₈S₂
MW: 463.5 g/mol

VQ-023398

Reference Standard

Aztreonam Methyl Ester chemical structure

Aztreonam Methyl Ester

CAS: 1255912-98-1
Formula: C₁₄H₁₉N₅O₈S₂
MW: 449.5 g/mol

VQ-024479

Reference Standard

Aztreonam secolactam Aztreonamyl carboxamide chemical structure

Aztreonam secolactam Aztreonamyl carboxamide

CAS: 730928-60-6
Formula: C₂₆H₃₄N₁₀O₁₆S₄
MW: 870.9 g/mol

VQ-029340

Reference Standard

Aztreonam T-Butyl Ester chemical structure

Aztreonam T-Butyl Ester

CAS: 330944-50-8
Formula: C₁₇H₂₅N₅O₈S₂
MW: 491.5 g/mol

VQ-043965

Reference Standard

Azure A Isomer chemical structure

CAS: 34185-21-2
Formula: C₁₄H₁₄ClN₃S
MW: 291.8 g/mol

VQ-038375

Reference Standard

Bacitracin A chemical structure

CAS: 22601-59-8
Formula: C₆₆H₁₀₃N₁₇O₁₆S
MW: 1422.7 g/mol

VQ-024480

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