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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

Dapagliflozin Keto Methoxy Impurity chemical structure

Dapagliflozin Keto Methoxy Impurity

CAS: 2377899-45-9
Formula: C₂₂H₂₅ClO₈
MW: 452.9 g/mol

In stock

Reference Standard

Dapagliflozin Ketone Tetraacetate Impurity chemical structure

Dapagliflozin Ketone Tetraacetate Impurity

CAS: 2266576-17-2
Formula: C₂₉H₃₁ClO₁₁
MW: 591 g/mol

VQ-047933

Reference Standard

Dapagliflozin methoxy furanose Impurity chemical structure

Dapagliflozin methoxy furanose Impurity

CAS: 2133407-77-7
Formula: C₂₂H₂₇ClO₇
MW: 438.9 g/mol

VQ-025175

Reference Standard

Dapagliflozin Methoxy Impurity chemical structure

Dapagliflozin Methoxy Impurity

CAS: 714269-57-5
Formula: C₂₂H₂₇ClO₇
MW: 438.9 g/mol

In stock

Reference Standard

Dapagliflozin Open Ring Impurity chemical structure

Dapagliflozin Open Ring Impurity

CAS: 2100872-88-4
Formula: C₂₁H₂₇ClO₇
MW: 426.9 g/mol

In stock

Reference Standard

Dapagliflozin R-Furanose Isomer chemical structure

Dapagliflozin R-Furanose Isomer

CAS: 1469910-83-5
Formula: C₂₁H₂₅ClO₆
MW: 408.9 g/mol

In stock

Reference Standard

Dapagliflozin S-Furanose Isomer chemical structure

Dapagliflozin S-Furanose Isomer

CAS: 1469910-70-0
Formula: C₂₁H₂₅ClO₆
MW: 408.9 g/mol

In stock

Reference Standard

Dapagliflozin Tetraacetyl Impurity chemical structure

Dapagliflozin Tetraacetyl Impurity

CAS: 461432-25-7
Formula: C₂₉H₃₃ClO₁₀
MW: 577 g/mol

In stock

Reference Standard

Dapagliflozin Triacetate chemical structure

Dapagliflozin Triacetate

CAS: 1443341-94-3
Formula: C₂₇H₃₁ClO₉
MW: 535 g/mol

VQ-022308

Reference Standard

Dapoxetine Hydroxyl Impurity chemical structure

Dapoxetine Hydroxyl Impurity

CAS: 1071929-03-7
Formula: C₂₁H₂₄ClNO
MW: 341.9 g/mol

VQ-036533

Reference Standard

Dapoxetine Impurity 11 chemical structure

Dapoxetine Impurity 11

CAS: 2245197-07-1
Formula: C₃₀H₃₁NO
MW: 421.6 g/mol

VQ-030034

Reference Standard

Daprodustat Ethyl Ester Impurity chemical structure

Daprodustat Ethyl Ester Impurity

CAS: 960540-96-9
Formula: C₂₁H₃₁N₃O₆
MW: 421.5 g/mol

VQ-028954

Reference Standard

Dapsone Azoxy Dimer chemical structure

Dapsone Azoxy Dimer

CAS: 35040-12-1
Formula: C₂₄H₂₀N₄O₅S₂
MW: 508.6 g/mol

VQ-047940

Reference Standard

Dapsone Impurity 35 chemical structure

Dapsone Impurity 35

CAS: 69391-11-3
Formula: C₁₂H₁₂N₂O₄S₂
MW: 312.4 g/mol

VQ-047939

Reference Standard

Daptomycin 2-D-Alanine Analog chemical structure

Daptomycin 2-D-Alanine Analog

CAS: 2440130-58-3
Formula: C₇₁H₁₀₀N₁₆O₂₅
MW: 1577.6 g/mol

VQ-036553

Reference Standard

Daptomycin Anhydro Impurity chemical structure

Daptomycin Anhydro Impurity

CAS: 121869-35-0
Formula: C₇₂H₉₉N₁₇O₂₅
MW: 1602.7 g/mol

VQ-025191

Reference Standard

Daptomycin Beta-Isomer chemical structure

Daptomycin Beta-Isomer

CAS: 123180-72-3
Formula: C₇₂H₁₀₁N₁₇O₂₆
MW: 1620.7 g/mol

VQ-025190

Reference Standard

Darifenacin 4-Hydroxy Impurity

Darifenacin 4-Hydroxy Impurity

CAS: 2468796-89-4
Formula: C₂₈H₃₁BrN₂O₂
MW: 507.46 g/mol

VQ-044069

Reference Standard

Darifenacin 7-Bromoethyl Impurity chemical structure

Darifenacin 7-Bromoethyl Impurity

CAS: 1598271-92-1
Formula: C₁₀H₁₁BrO
MW: 227.1 g/mol

VQ-030055

Reference Standard

Darifenacin cyano Impurity chemical structure

Darifenacin cyano Impurity

CAS: 1229355-35-4
Formula: C₁₈H₁₉BrN₂
MW: 343.3 g/mol

VQ-047950

Reference Standard

Darifenacin Dimer-2 Impurity

Darifenacin Dimer-2 Impurity

CAS: 2280857-32-9
Formula: C₃₈H₄₀N₂O₃
MW: 572.74 g/mol

VQ-030052

Reference Standard

Darifenacin Impurity A chemical structure

Darifenacin Impurity A

CAS: 1048979-16-3
Formula: C₂₈H₂₉NO₃
MW: 427.5 g/mol

VQ-030051

Reference Standard

Darifenacin Impurity B chemical structure

Darifenacin Impurity B

CAS: 127264-14-6
Formula: C₁₀H₁₁BrO
MW: 227.1 g/mol

VQ-025192

Reference Standard

Darifenacin Impurity C chemical structure

Darifenacin Impurity C

CAS: 252317-48-9
Formula: C₂₈H₂₈N₂O
MW: 408.5 g/mol

VQ-036557

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