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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

Besifloxacin Impurity F chemical structure

Besifloxacin Impurity F

CAS: 1613314-38-7
Formula: C₁₉H₂₂Cl₂FN₃O₃
MW: 430.3 g/mol

VQ-029410

Reference Standard

Besifloxacin Impurity G chemical structure

Besifloxacin Impurity G

CAS: 124932-43-0
Formula: C₆H₁₄N₂
MW: 114.19 g/mol

VQ-004523

Reference Standard

Besifloxacin Impurity G (Hydrochloride)

Besifloxacin Impurity G (Hydrochloride)

CAS: 1883721-93-4
Formula: C₆H₁₄N₂.ClH
MW: 150.65 g/mol

VQ-004524

Reference Standard

Besifloxacin Regiomer

Besifloxacin Regiomer

CAS: 1613363-52-2
Formula: C₁₉H₂₁ClFN₃O₃
MW: 393.84 g/mol

VQ-029409

Reference Standard

Beta Ergocryptine chemical structure

Beta Ergocryptine

CAS: 20315-46-2
Formula: C₃₂H₄₁N₅O₅
MW: 575.7 g/mol

VQ-036041

Reference Standard

Beta Methyl 1,2-Dihydro Desoximetasone chemical structure

Beta Methyl 1,2-Dihydro Desoximetasone

CAS: 2770242-92-5
Formula: C₂₂H₃₀O₅
MW: 374.5 g/mol

VQ-047572

Reference Standard

Beta-(Z)-Brivudine chemical structure

Beta-(Z)-Brivudine

CAS: 77530-02-0
Formula: C₁₁H₁₃BrN₂O₅
MW: 333.13 g/mol

VQ-043079

Reference Standard

Beta-Aspartyl Aspartic Acid chemical structure

Beta-Aspartyl Aspartic Acid

CAS: 60079-22-3
Formula: C₈H₁₂N₂O₇
MW: 248.19 g/mol

VQ-026320

Reference Standard

Beta-Beta-Diglycerol chemical structure

Beta-Beta-Diglycerol

CAS: 100450-00-8
Formula: C₆H₁₄O₅
MW: 166.17 g/mol

VQ-040833

Reference Standard

Beta-Doxercalciferol chemical structure

Beta-Doxercalciferol

CAS: 216309-44-3
Formula: C₂₈H₄₄O₂
MW: 412.6 g/mol

VQ-043146

Reference Standard

Beta-Glycerylphosphorylcholine chemical structure

Beta-Glycerylphosphorylcholine

CAS: 18418-25-2
Formula: C₈H₂₀NO₆P
MW: 257.22 g/mol

VQ-044440

Reference Standard

Beta-L-Ribofuranose chemical structure

Beta-L-Ribofuranose

CAS: 41546-19-4
Formula: C₅H₁₀O₅
MW: 150.13 g/mol

VQ-029320

Reference Standard

Beta-Lipoic Acid chemical structure

Beta-Lipoic Acid

CAS: 6992-30-9
Formula: C₈H₁₄O₃S₂
MW: 222.3 g/mol

VQ-028335

Reference Standard

Beta-Methyl Naphthyl Ketone chemical structure

Beta-Methyl Naphthyl Ketone

CAS: 93-08-3
Formula: C₁₂H₁₀O
MW: 170.21 g/mol

VQ-036324

Reference Standard

Beta-Naftifine chemical structure

CAS: 98977-54-9
Formula: C₂₁H₂₁N
MW: 287.4 g/mol

VQ-023200

Reference Standard

Beta-Sitosteryl Ferulate chemical structure

Beta-Sitosteryl Ferulate

CAS: 286011-30-1
Formula: C₃₉H₅₈O₄
MW: 590.9 g/mol

VQ-049346

Reference Standard

Beta-Thevinone chemical structure

CAS: 15358-23-3
Formula: C₂₃H₂₇NO₄
MW: 381.5 g/mol

VQ-051186

Reference Standard

Beta-Tocopherol chemical structure

Beta-Tocopherol

CAS: 16698-35-4
Formula: C₂₈H₄₈O₂
MW: 416.7 g/mol

VQ-034662

Reference Standard

Betadex Sulfobutyl Ether Sodium USP 1 Reference Standard

Betadex Sulfobutyl Ether Sodium USP 1 Reference Standard

CAS: 182410-00-0
Formula: C₅₀H₈₄Na₂O₄₁S₂
MW: 1451.29 g/mol

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Reference Standard

Betahistine Dimethanesulfonate chemical structure

Betahistine Dimethanesulfonate

CAS: 54856-23-4
Formula: C₁₀H₂₀N₂O₆S₂
MW: 328.4 g/mol

VQ-021797

Reference Standard

Betahistine Impurity 5 chemical structure

Betahistine Impurity 5

Formula: C₁₄H₁₉ClN₂O₆
MW: 346.76 g/mol

VQ-004526

Reference Standard

Betahistine Methylamine Impurity chemical structure

Betahistine Methylamine Impurity

CAS: 26832-29-1
Formula: C₉H₁₄N₂
MW: 150.22 g/mol

VQ-045460

Reference Standard

Betaine glucuronate chemical structure

Betaine glucuronate

CAS: 32087-68-6
Formula: C₁₁H₁₉NO₈
MW: 293.27 g/mol

VQ-044233

Reference Standard

Betamethasone 17-Acetate chemical structure

Betamethasone 17-Acetate

CAS: 5534-12-3
Formula: C₂₄H₃₁FO₆
MW: 434.5 g/mol

VQ-043972

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