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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

Ginsenoside Rb1 chemical structure

Ginsenoside Rb1

CAS: 41753-43-9
Formula: C₅₄H₉₂O₂₃
MW: 1109.3 g/mol

VQ-030991

Reference Standard

Ginsenoside Rb2 chemical structure

Ginsenoside Rb2

CAS: 11021-13-9
Formula: C₅₃H₉₀O₂₂
MW: 1079.3 g/mol

VQ-030990

Reference Standard

Ginsenoside Rc chemical structure

CAS: 11021-14-0
Formula: C₅₃H₉₀O₂₂
MW: 1079.3 g/mol

VQ-030992

Reference Standard

Ginsenoside Rd chemical structure

CAS: 52705-93-8
Formula: C₄₈H₈₂O₁₈
MW: 947.2 g/mol

VQ-030988

Reference Standard

Ginsenoside Re chemical structure

CAS: 52286-59-6
Formula: C₄₈H₈₂O₁₈
MW: 947.2 g/mol

VQ-030989

Reference Standard

Ginsenoside Rf chemical structure

CAS: 52286-58-5
Formula: C₄₂H₇₂O₁₄
MW: 801 g/mol

VQ-030993

Reference Standard

Ginsenoside Rg1 chemical structure

Ginsenoside Rg1

CAS: 22427-39-0
Formula: C₄₂H₇₂O₁₄
MW: 801 g/mol

VQ-030987

Reference Standard

Ginsenoside Rg2 chemical structure

Ginsenoside Rg2

CAS: 52286-74-5
Formula: C₄₂H₇₂O₁₃
MW: 785 g/mol

VQ-030994

Reference Standard

Ginsenoside Ro chemical structure

CAS: 34367-04-9
Formula: C₄₈H₇₆O₁₉
MW: 957.1 g/mol

VQ-045216

Reference Standard

Givinostat Acid Impurity chemical structure

Givinostat Acid Impurity

CAS: 199657-47-1
Formula: C₂₄H₂₆N₂O₄
MW: 406.5 g/mol

VQ-030995

Reference Standard

Givinostat Impuriy 1

Givinostat Impuriy 1

CAS: 2485708-91-4
Formula: C₂₄H₂₅ClN₂O₃
MW: 424.92 g/mol

VQ-045317

Reference Standard

Glecaprevir Impurity 1 (Freebase) chemical structure

Glecaprevir Impurity 1 (Freebase)

CAS: 1360997-58-5
Formula: C₉H₁₄F₂N₂O₃S
MW: 268.28 g/mol

VQ-005035

Reference Standard

Glecaprevir Impurity 1 (Hydrochloride) chemical structure

Glecaprevir Impurity 1 (Hydrochloride)

CAS: 1360828-80-3
Formula: C₉H₁₅ClF₂N₂O₃S
MW: 304.74 g/mol

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Reference Standard

Glibenclamide - Impurity A chemical structure

Glibenclamide - Impurity A

CAS: 16673-34-0
Formula: C₁₆H₁₇ClN₂O₄S
MW: 368.8 g/mol

VQ-022757

Reference Standard

Gliclazide Impurity B chemical structure

Gliclazide Impurity B

CAS: 54786-86-6
Formula: C₇H₁₂N₂O
MW: 140.18 g/mol

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Reference Standard

Glimepiride 2-Oxo-Acetic acid

Glimepiride 2-Oxo-Acetic acid

CAS: 2724728-98-5
Formula: .
MW: 453.4 g/mol

VQ-034846

Reference Standard

Glimepiride 2-Oxo-methoxy carbonyl Impurity

Glimepiride 2-Oxo-methoxy carbonyl Impurity

CAS: 2731065-51-1
Formula: C₁₈H₂₁N₃O₇S
MW: 423.44 g/mol

VQ-034845

Reference Standard

Glimepiride Benzenesulfonic Acid Impurity chemical structure

Glimepiride Benzenesulfonic Acid Impurity

CAS: 2222920-39-8
Formula: C₁₆H₂₀N₂O₅S
MW: 352.4 g/mol

VQ-045319

Reference Standard

Glimepiride Benzenesulfonyl Chloride Impurity chemical structure

Glimepiride Benzenesulfonyl Chloride Impurity

CAS: 119043-16-2
Formula: C₁₆H₁₉ClN₂O₄S
MW: 370.9 g/mol

VQ-045318

Reference Standard

Glimepiride Ethyl Ester Impurity chemical structure

Glimepiride Ethyl Ester Impurity

CAS: 318515-70-7
Formula: C₁₉H₂₅N₃O₆S
MW: 423.5 g/mol

VQ-022765

Reference Standard

Glimepiride Impurity 2 chemical structure

Glimepiride Impurity 2

CAS: 41176-69-6
Formula: C₁₅H₂₈N₂O
MW: 252.4 g/mol

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Reference Standard

Glimepiride N-Ethyl Sulfonamide Impurity

Glimepiride N-Ethyl Sulfonamide Impurity

CAS: 2904692-54-0
Formula: C₂₆H₃₈N₄O₅S
MW: 518.67 g/mol

VQ-031003

Reference Standard

Glimepiride Sulfonamide Ortho-Isomer chemical structure

Glimepiride Sulfonamide Ortho-Isomer

CAS: 2366968-78-5
Formula: C₁₆H₂₁N₃O₄S
MW: 351.4 g/mol

VQ-025998

Reference Standard

Glipizide Dimer Impurity Potassium Salt

Glipizide Dimer Impurity Potassium Salt

Formula: C₂₈H₂₈N₇O₆S₂.K
MW: 661.79 g/mol

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