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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

14,252products

1,516in stock

COA + SDSwith every lot

Reference Standard

Difluoro Atorvastatin Acetonide tert-Butyl Ester chemical structure

Difluoro Atorvastatin Acetonide tert-Butyl Ester

CAS: 693793-87-2
Formula: C₄₀H₄₆F₂N₂O₅
MW: 672.8 g/mol

VQ-029259

Reference Standard

Difluoroprednisolone-17, 21-Diacetate chemical structure

Difluoroprednisolone-17, 21-Diacetate

CAS: 23641-05-6
Formula: C₂₅H₃₀F₂O₇
MW: 480.5 g/mol

VQ-027600

Reference Standard

Difluprednate 0.55 RRT Impurity

Difluprednate 0.55 RRT Impurity

Formula: C₂₁H₂₄F₂O₄
MW: 378.41 g/mol

In stock

Reference Standard

Digitoxin chemical structure

CAS: 71-63-6
Formula: C₄₁H₆₄O₁₃
MW: 764.9 g/mol

VQ-025314

Reference Standard

Digoxin - Impurity J chemical structure

Digoxin - Impurity J

CAS: 5355-48-6
Formula: C₄₃H₆₆O₁₅
MW: 823 g/mol

VQ-025319

Reference Standard

Dihexyl Aminoquat Hydrobromide

Dihexyl Aminoquat Hydrobromide

CAS: 2170771-70-5
Formula: C₁₈H₄₃N₃ : HBr : 2Br
MW: 542.27 g/mol

VQ-025083

Reference Standard

Dihexyl carbonate chemical structure

Dihexyl carbonate

CAS: 7523-15-1
Formula: C₁₃H₂₆O₃
MW: 230.34 g/mol

VQ-036496

Reference Standard

Dihomo-gamma-Linolenic Acid Ethyl Ester chemical structure

Dihomo-gamma-Linolenic Acid Ethyl Ester

CAS: 55968-21-3
Formula: C₂₂H₃₈O₂
MW: 334.5 g/mol

VQ-038079

Reference Standard

Dihydro Artemisinic Acid chemical structure

Dihydro Artemisinic Acid

CAS: 85031-59-0
Formula: C₁₅H₂₄O₂
MW: 236.35 g/mol

VQ-024367

Reference Standard

Dihydro Artemisinin Dimer chemical structure

Dihydro Artemisinin Dimer

CAS: 150358-71-7
Formula: C₃₀H₄₆O₉
MW: 550.7 g/mol

VQ-020836

Reference Standard

Dihydro Donepezil chemical structure

Dihydro Donepezil

CAS: 120012-04-6
Formula: C₂₄H₃₁NO₃
MW: 381.5 g/mol

VQ-025374

Reference Standard

Dihydro Dutasteride chemical structure

Dihydro Dutasteride

CAS: 164656-22-8
Formula: C₂₇H₃₂F₆N₂O₂
MW: 530.5 g/mol

VQ-025449

Reference Standard

Dihydro Folic Acid chemical structure

Dihydro Folic Acid

CAS: 4033-27-6
Formula: C₁₉H₂₁N₇O₆
MW: 443.4 g/mol

VQ-024075

Reference Standard

Dihydro Vitamin K1 chemical structure

Dihydro Vitamin K1

CAS: 572-96-3
Formula: C₃₁H₄₈O₂
MW: 452.7 g/mol

VQ-041466

Reference Standard

Dihydro-N,N-dimethyl-3,3-diphenyl-2(3H)-furaniminium Bromide chemical structure

Dihydro-N,N-dimethyl-3,3-diphenyl-2(3H)-furaniminium Bromide

CAS: 37743-18-3
Formula: C₁₈H₂₀BrNO
MW: 346.3 g/mol

VQ-031615

Reference Standard

Dihydroartemisinin chemical structure

Dihydroartemisinin

CAS: 71939-50-9
Formula: C₁₅H₂₄O₅
MW: 284.35 g/mol

VQ-020831

Reference Standard

Dihydroartemisinin (alpha,beta Mixture) chemical structure

Dihydroartemisinin (alpha,beta Mixture)

CAS: 131175-87-6
Formula: C₁₅H₂₄O₅
MW: 284.35 g/mol

VQ-020837

Reference Standard

Dihydroartemisinin Impurity A chemical structure

Dihydroartemisinin Impurity A

CAS: 107466-88-6
Formula: C₁₄H₂₂O₃
MW: 238.32 g/mol

VQ-035795

Reference Standard

Dihydroartemisinin Impurity F chemical structure

Dihydroartemisinin Impurity F

CAS: 173427-03-7
Formula: C₁₄H₂₂O₄
MW: 254.32 g/mol

VQ-021624

Reference Standard

Dihydroartemisinin tetrafurano acetate chemical structure

Dihydroartemisinin tetrafurano acetate

CAS: 198817-95-7
Formula: C₁₅H₂₄O₅
MW: 284.35 g/mol

VQ-043966

Reference Standard

Dihydroberberine chemical structure

Dihydroberberine

CAS: 483-15-8
Formula: C₂₀H₁₉NO₄
MW: 337.4 g/mol

VQ-045165

Reference Standard

Dihydrocinchonidine chemical structure

Dihydrocinchonidine

CAS: 485-64-3
Formula: C₁₉H₂₄N₂O
MW: 296.4 g/mol

VQ-041805

Reference Standard

Dihydrocinchonidine Sulphate chemical structure

Dihydrocinchonidine Sulphate

CAS: 78848-93-8
Formula: C₁₉H₂₆N₂O₅S
MW: 394.5 g/mol

VQ-027708

Reference Standard

Dihydrocinchonine Sulphate

Dihydrocinchonine Sulphate

CAS: 70134-33-7
Formula: C₁₉H₂₄N₂O : 1/2(H₂SO₄)
MW: 345.44 g/mol

VQ-041806

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