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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

Prasugrel Thiomethyl Impurity (E-Isomer) chemical structure

Prasugrel Thiomethyl Impurity (E-Isomer)

CAS: 916599-27-4
Formula: C₁₉H₂₂FNO₃S
MW: 363.4 g/mol

VQ-041603

Reference Standard

Pravastatin 2,3-Anhydro Lactone chemical structure

Pravastatin 2,3-Anhydro Lactone

CAS: 1114834-63-7
Formula: C₂₃H₃₂O₅
MW: 388.5 g/mol

VQ-027581

Reference Standard

Pravastatin 6'-Ketone chemical structure

Pravastatin 6'-Ketone

CAS: 201423-59-8
Formula: C₂₃H₃₄O₇
MW: 422.5 g/mol

VQ-033233

Reference Standard

Pravastatin Diol Lactone chemical structure

Pravastatin Diol Lactone

CAS: 159345-93-4
Formula: C₁₈H₂₆O₅
MW: 322.4 g/mol

VQ-033288

Reference Standard

Pravastatin Ethyl Ester chemical structure

Pravastatin Ethyl Ester

CAS: 2727065-87-2
Formula: C₂₅H₄₀O₇
MW: 452.6 g/mol

VQ-033287

Reference Standard

Pravastatin Methyl Ester chemical structure

Pravastatin Methyl Ester

CAS: 81131-72-8
Formula: C₂₄H₃₈O₇
MW: 438.6 g/mol

VQ-027539

Reference Standard

Pre Doxercalciferol chemical structure

Pre Doxercalciferol

CAS: 1818286-63-3
Formula: C₂₈H₄₄O₂
MW: 412.6 g/mol

VQ-025396

Reference Standard

Pre-Calcipotriol chemical structure

Pre-Calcipotriol

CAS: 176302-02-6
Formula: C₂₇H₄₀O₃
MW: 412.6 g/mol

VQ-021957

Reference Standard

Pre-Vitamin D3 Decanoate chemical structure

Pre-Vitamin D3 Decanoate

CAS: 927822-18-2
Formula: C₃₇H₆₂O₂
MW: 538.9 g/mol

VQ-029771

Reference Standard

Prednienic Acid chemical structure

Prednienic Acid

CAS: 37927-29-0
Formula: C₂₀H₂₆O₅
MW: 346.4 g/mol

VQ-023538

Reference Standard

Prednisolone 17,21-Diacetate chemical structure

Prednisolone 17,21-Diacetate

CAS: 17652-24-3
Formula: C₂₅H₃₂O₇
MW: 444.5 g/mol

VQ-021913

Reference Standard

Prednisolone 20-Ethyl Ester Impurity chemical structure

Prednisolone 20-Ethyl Ester Impurity

CAS: 182069-19-8
Formula: C₂₅H₃₄O₇
MW: 446.5 g/mol

VQ-031651

Reference Standard

Prednisolone 21-formate chemical structure

Prednisolone 21-formate

CAS: 2141-22-2
Formula: C₂₂H₂₈O₆
MW: 388.5 g/mol

VQ-027598

Reference Standard

Prednisolone 21-Hemisuccinate Sodium Salt chemical structure

Prednisolone 21-Hemisuccinate Sodium Salt

CAS: 1715-33-9
Formula: C₂₅H₃₁NaO₈
MW: 482.5 g/mol

VQ-031086

Reference Standard

Prednisolone 21-Methanesulfonate chemical structure

Prednisolone 21-Methanesulfonate

CAS: 35410-28-7
Formula: C₂₂H₃₀O₇S
MW: 438.5 g/mol

VQ-041616

Reference Standard

Prednisolone D-Homo A derivative chemical structure

Prednisolone D-Homo A derivative

CAS: 95615-71-7
Formula: C₂₁H₂₉O₈P
MW: 440.4 g/mol

VQ-044510

Reference Standard

Prednisolone Dicarbonate Impurity chemical structure

Prednisolone Dicarbonate Impurity

CAS: 133991-62-5
Formula: C₂₆H₃₄O₉
MW: 490.5 g/mol

VQ-041614

Reference Standard

Prednisolone Impurity 7 chemical structure

Prednisolone Impurity 7

CAS: 111186-92-6
Formula: C₂₁H₂₆O₅
MW: 358.4 g/mol

VQ-033298

Reference Standard

Prednisolone Sodium Metasulfobenzoate chemical structure

Prednisolone Sodium Metasulfobenzoate

CAS: 630-67-1
Formula: C₂₈H₃₁NaO₉S
MW: 566.6 g/mol

VQ-033293

Reference Standard

Prednisolone Z-enol aldehyde Impurity chemical structure

Prednisolone Z-enol aldehyde Impurity

CAS: 118864-87-2
Formula: C₂₁H₂₆O₄
MW: 342.4 g/mol

VQ-044751

Reference Standard

Prednisolone-17-acetate chemical structure

Prednisolone-17-acetate

CAS: 52628-64-5
Formula: C₂₃H₃₀O₆
MW: 402.5 g/mol

VQ-027596

Reference Standard

Prednisolone-21-Valerate chemical structure

Prednisolone-21-Valerate

CAS: 39791-31-6
Formula: C₂₆H₃₆O₆
MW: 444.6 g/mol

VQ-031099

Reference Standard

Prednisone 21-Acetate chemical structure

Prednisone 21-Acetate

CAS: 125-10-0
Formula: C₂₃H₂₈O₆
MW: 400.5 g/mol

VQ-025407

Reference Standard

Prednisone Impurity D chemical structure

Prednisone Impurity D

CAS: 10184-69-7
Formula: C₂₁H₂₆O₄
MW: 342.4 g/mol

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