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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

Paramethasone chemical structure

CAS: 53-33-8
Formula: C₂₂H₂₉FO₅
MW: 392.5 g/mol

VQ-033063

Reference Standard

Parathiazine chemical structure

CAS: 84-08-2
Formula: C₁₈H₂₀N₂S
MW: 296.4 g/mol

VQ-033064

Reference Standard

Parbendazole chemical structure

CAS: 14255-87-9
Formula: C₁₃H₁₇N₃O₂
MW: 247.29 g/mol

VQ-027389

Reference Standard

Pargeverine Impurity 2 chemical structure

Pargeverine Impurity 2

CAS: 30118-97-9
Formula: C₁₈H₁₆O₃
MW: 280.3 g/mol

VQ-027659

Reference Standard

Parlar 50 chemical structure

CAS: 66860-80-8
Formula: C₁₀H₉Cl₉
MW: 448.2 g/mol

VQ-045206

Reference Standard

Paromamine chemical structure

CAS: 534-47-4
Formula: C₁₂H₂₅N₃O₇
MW: 323.34 g/mol

VQ-026865

Reference Standard

Paromamine Trihydrochloride chemical structure

Paromamine Trihydrochloride

CAS: 18685-97-7
Formula: C₁₂H₂₈Cl₃N₃O₇
MW: 432.7 g/mol

VQ-038580

Reference Standard

Paromomycin II chemical structure

CAS: 51795-47-2
Formula: C₂₃H₄₅N₅O₁₄
MW: 615.6 g/mol

VQ-026862

Reference Standard

Paroxetine Dimer Dihydrochloride chemical structure

Paroxetine Dimer Dihydrochloride

CAS: 606968-05-2
Formula: C₃₉H₄₀F₂N₂O₆
MW: 670.7 g/mol

VQ-041344

Reference Standard

Paroxetine Impurity E chemical structure

Paroxetine Impurity E

CAS: 1396174-70-1
Formula: C₁₉H₂₀FNO₃
MW: 329.4 g/mol

VQ-027399

Reference Standard

Paroxetine piperidin-3-ol Impurity chemical structure

Paroxetine piperidin-3-ol Impurity

CAS: 384338-20-9
Formula: C₁₃H₁₉NO
MW: 205.3 g/mol

VQ-039210

Reference Standard

PAS3 Enantiomer (palonosetron) chemical structure

PAS3 Enantiomer (palonosetron)

CAS: 135729-57-6
Formula: C₁₉H₂₂N₂O
MW: 294.4 g/mol

In stock

Reference Standard

Pazopanib Impurity 37 chemical structure

Pazopanib Impurity 37

CAS: 1252927-45-9
Formula: C₁₄H₁₄ClN₅
MW: 287.75 g/mol

In stock

Reference Standard

Pazopanib Impurity A chemical structure

Pazopanib Impurity A

CAS: 444731-75-3
Formula: C₁₄H₁₄ClN₅
MW: 287.75 g/mol

In stock

Reference Standard

Pazopanib Impurity C chemical structure

Pazopanib Impurity C

CAS: 6973-09-7
Formula: C₇H₁₀N₂O₂S
MW: 186.23 g/mol

VQ-005495

Reference Standard

Pazopanib Pyrimidine impurity chemical structure

Pazopanib Pyrimidine impurity

CAS: 444731-74-2
Formula: C₁₃H₁₂ClN₅
MW: 273.72 g/mol

In stock

Reference Standard

Pazopanib Regio Isomer chemical structure

Pazopanib Regio Isomer

CAS: 2369664-19-5
Formula: C₂₁H₂₃N₇O₂S
MW: 437.5 g/mol

In stock

Reference Standard

Pazopanib Related Compound 3 chemical structure

Pazopanib Related Compound 3

CAS: 1252927-44-8
Formula: C₂₇H₂₅ClN₁₀
MW: 525 g/mol

In stock

Reference Standard

Pazopanib Sulfonamide Dimer Impurity chemical structure

Pazopanib Sulfonamide Dimer Impurity

CAS: 1072836-76-0
Formula: C₁₄H₁₇N₃O₄S₂
MW: 355.4 g/mol

In stock

Reference Standard

Pazopanib Trimer chemical structure

Pazopanib Trimer

CAS: 1226500-01-1
Formula: C₇₀H₆₉N₁₉O₂S
MW: 1240.5 g/mol

VQ-041362

Reference Standard

PBC-5A AZA Des Boc Impurity

PBC-5A AZA Des Boc Impurity

Formula: C₁₈H₂₄N₈
MW: 352.44 g/mol

VQ-005500

Reference Standard

PBC-5A AZA Impurity chemical structure

PBC-5A AZA Impurity

CAS: 2399424-46-3
Formula: C₂₈H₄₀N₈O₄
MW: 552.7 g/mol

VQ-005501

Reference Standard

PBC-9A EDA Impurity

PBC-9A EDA Impurity

Formula: C₂₂H₂₇N₇O₂.C₂F₃O
MW: 518.51 g/mol

In stock

Reference Standard

PBT Impurity 6 chemical structure

Formula: C₁₆H₂₀O₅
MW: 292.33 g/mol

In stock

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