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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

Pendimethalin Impurity 5

Pendimethalin Impurity 5

CAS: 56038-88-1
Formula: C₁₃H₁₉N₃O₄
MW: 281.3 g/mol

VQ-044295

Reference Standard

Penicillamine Trisulfide Impurity chemical structure

Penicillamine Trisulfide Impurity

CAS: 22801-32-7
Formula: C₁₀H₂₀N₂O₄S₃
MW: 328.5 g/mol

VQ-032520

Reference Standard

Penicillenic Acid chemical structure

Penicillenic Acid

CAS: 10250-99-4
Formula: C₉H₁₂N₂O₄S
MW: 244.27 g/mol

VQ-033101

Reference Standard

Penicillic Acid chemical structure

Penicillic Acid

CAS: 90-65-3
Formula: C₈H₁₀O₄
MW: 170.16 g/mol

VQ-045174

Reference Standard

Penicillin G Benzathine Tetrahydrate chemical structure

Penicillin G Benzathine Tetrahydrate

CAS: 41372-02-5
Formula: C₄₈H₆₄N₆O₁₂S₂
MW: 981.2 g/mol

VQ-033098

Reference Standard

Penicillin Impurity 2 chemical structure

Penicillin Impurity 2

CAS: 1978372-79-0
Formula: C₁₆H₂₄N₄O₆S₂
MW: 432.5 g/mol

VQ-043874

Reference Standard

Penicilloic acid chemical structure

Penicilloic acid

CAS: 64527-07-7
Formula: C₉H₁₄N₂O₅S
MW: 262.29 g/mol

VQ-032824

Reference Standard

Penicilloic V Acid chemical structure

Penicilloic V Acid

CAS: 1049-84-9
Formula: C₁₆H₂₀N₂O₆S
MW: 368.4 g/mol

VQ-033095

Reference Standard

Penilloic acid chemical structure

CAS: 501-34-8
Formula: C₁₅H₂₀N₂O₃S
MW: 308.4 g/mol

VQ-027422

Reference Standard

Pentacarboxylporphyrin I Dihydrochloride chemical structure

Pentacarboxylporphyrin I Dihydrochloride

CAS: 141407-11-6
Formula: C₃₇H₄₀Cl₂N₄O₁₀
MW: 771.6 g/mol

VQ-040247

Reference Standard

Pentadecyl(2-(trimethylammonio)ethyl)phosphate chemical structure

Pentadecyl(2-(trimethylammonio)ethyl)phosphate

CAS: 146801-07-2
Formula: C₂₀H₄₄NO₄P
MW: 393.5 g/mol

VQ-049119

Reference Standard

Pentafluoro Pentanethiol chemical structure

Pentafluoro Pentanethiol

CAS: 148757-88-4
Formula: C₅H₇F₅S
MW: 194.17 g/mol

VQ-037448

Reference Standard

Pentafluoro Sofosbuvir Impurity chemical structure

Pentafluoro Sofosbuvir Impurity

CAS: 1337529-56-2
Formula: C₁₈H₁₇F₅NO₅P
MW: 453.3 g/mol

VQ-023784

Reference Standard

Pentamidine Impurity 2 chemical structure

Pentamidine Impurity 2

CAS: 91945-01-6
Formula: C₁₂H₁₄BrNO
MW: 268.15 g/mol

VQ-041396

Reference Standard

Pentamidine Impurity 2 chemical structure

Pentamidine Impurity 2

CAS: 1252-44-4
Formula: C₂₃H₃₀N₂O₄
MW: 398.5 g/mol

VQ-041397

Reference Standard

Pentamidine Isethionate chemical structure

Pentamidine Isethionate

CAS: 140-64-7
Formula: C₂₃H₃₆N₄O₁₀S₂
MW: 592.7 g/mol

VQ-032635

Reference Standard

Pentoxifylline Butanoic Acid Impurity chemical structure

Pentoxifylline Butanoic Acid Impurity

CAS: 6493-07-8
Formula: C₁₁H₁₄N₄O₄
MW: 266.25 g/mol

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Reference Standard

Pentyl (1-((2R,3R,4S,5R)-3,4-dihydroxy-5-methyltetrahydrofuran-2-yl)-2-oxo-1,2-dihydropyrimidin-4-yl)carbamate chemical structure

Pentyl (1-((2R,3R,4S,5R)-3,4-dihydroxy-5-methyltetrahydrofuran-2-yl)-2-oxo-1,2-dihydropyrimidin-4-yl)carbamate

CAS: 216450-02-1
Formula: C₁₅H₂₃N₃O₆
MW: 341.36 g/mol

VQ-035169

Reference Standard

Pentyl chloroformate chemical structure

Pentyl chloroformate

CAS: 638-41-5
Formula: C₆H₁₁ClO₂
MW: 150.6 g/mol

VQ-032731

Reference Standard

Pentyl Paraben chemical structure

CAS: 6521-29-5
Formula: C₁₂H₁₆O₃
MW: 208.25 g/mol

VQ-043088

Reference Standard

Peonidin-3-O-galactoside chloride chemical structure

Peonidin-3-O-galactoside chloride

CAS: 28148-89-2
Formula: C₂₂H₂₃ClO₁₁
MW: 498.9 g/mol

VQ-040626

Reference Standard

Per-6-iodo-gamma-cyclodextrin chemical structure

Per-6-iodo-gamma-cyclodextrin

CAS: 168296-33-1
Formula: C₄₈H₇₂I₈O₃₂
MW: 2176.3 g/mol

VQ-033961

Reference Standard

Peramivir Impurity 14 (Freebase) chemical structure

Peramivir Impurity 14 (Freebase)

CAS: 134234-04-1
Formula: C₆H₉NO₂
MW: 127.14 g/mol

VQ-005517

Reference Standard

Peramivir Impurity 14 (Hydrochloride) chemical structure

Peramivir Impurity 14 (Hydrochloride)

CAS: 130931-84-9
Formula: C₆H₁₀ClNO₂
MW: 163.6 g/mol

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