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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

Eperisone Impurity 8 chemical structure

Eperisone Impurity 8

CAS: 27922-18-5
Formula: C₁₇H₂₆ClNO
MW: 295.8 g/mol

VQ-048229

Reference Standard

Epi Galanthamine chemical structure

Epi Galanthamine

CAS: 1668-85-5
Formula: C₁₇H₂₁NO₃
MW: 287.35 g/mol

VQ-022744

Reference Standard

Epi Hydrocortisone Hemisuccinate chemical structure

Epi Hydrocortisone Hemisuccinate

CAS: 103242-89-3
Formula: C₂₅H₃₄O₈
MW: 462.5 g/mol

VQ-026078

Reference Standard

epi-Velpatasvir chemical structure

epi-Velpatasvir

CAS: 1493768-22-1
Formula: C₄₉H₅₄N₈O₈
MW: 883 g/mol

VQ-028652

Reference Standard

Epicamphor chemical structure

CAS: 10292-98-5
Formula: C₁₀H₁₆O
MW: 152.23 g/mol

VQ-029594

Reference Standard

Epicatechin Gallate chemical structure

Epicatechin Gallate

CAS: 1257-08-5
Formula: C₂₂H₁₈O₁₀
MW: 442.4 g/mol

VQ-040176

Reference Standard

Epicholesterol chemical structure

CAS: 474-77-1
Formula: C₂₇H₄₆O
MW: 386.7 g/mol

VQ-032779

Reference Standard

Epilactose chemical structure

CAS: 50468-56-9
Formula: C₁₂H₂₂O₁₁
MW: 342.3 g/mol

VQ-025558

Reference Standard

Epinastine Chloroacetamide Impurity chemical structure

Epinastine Chloroacetamide Impurity

CAS: 21535-43-3
Formula: C₁₅H₁₄ClNO
MW: 259.73 g/mol

VQ-045409

Reference Standard

Epinastine Hydrochloride Impurity A chemical structure

Epinastine Hydrochloride Impurity A

CAS: 141342-70-3
Formula: C₁₆H₁₄ClN₃
MW: 283.75 g/mol

VQ-037026

Reference Standard

Epinephrine 4-O-Sulfate chemical structure

Epinephrine 4-O-Sulfate

CAS: 85927-06-6
Formula: C₉H₁₃NO₆S
MW: 263.27 g/mol

VQ-029044

Reference Standard

Epinephrine Impuirty 4 chemical structure

Epinephrine Impuirty 4

CAS: 2518001-66-4
Formula: C₁₆H₂₀Cl₂N₂O₄
MW: 375.2 g/mol

VQ-032204

Reference Standard

Epinephrine Impurity 17

Epinephrine Impurity 17

CAS: 2251033-82-4
Formula: C₃₅H₃₀O₁₆
MW: 706.6 g/mol

VQ-047340

Reference Standard

Epinephrine Sulfate chemical structure

Epinephrine Sulfate

CAS: 77469-50-2
Formula: C₉H₁₃NO₆S
MW: 263.27 g/mol

VQ-047343

Reference Standard

Epirubicin Dimer chemical structure

Epirubicin Dimer

CAS: 1046827-43-3
Formula: C₅₄H₅₈N₂O₂₂
MW: 1087 g/mol

VQ-037029

Reference Standard

Epitetracycline chemical structure

Epitetracycline

CAS: 79-85-6
Formula: C₂₂H₂₄N₂O₈
MW: 444.4 g/mol

VQ-023872

Reference Standard

Eplerenone Enacid Impurity chemical structure

Eplerenone Enacid Impurity

CAS: 95716-74-8
Formula: C₂₃H₂₈O₅
MW: 384.5 g/mol

VQ-044298

Reference Standard

Epoprostenol E-Isomer chemical structure

Epoprostenol E-Isomer

CAS: 65844-28-2
Formula: C₂₀H₃₂O₅
MW: 352.5 g/mol

VQ-030516

Reference Standard

Epoxy Exemestane (6 Alpha, Beta Isomer) chemical structure

Epoxy Exemestane (6 Alpha, Beta Isomer)

CAS: 184972-12-1
Formula: C₂₀H₂₄O₃
MW: 312.4 g/mol

VQ-025688

Reference Standard

Epoxy Exemestane (6-Alfa Isomer) chemical structure

Epoxy Exemestane (6-Alfa Isomer)

CAS: 152764-24-4
Formula: C₂₀H₂₄O₃
MW: 312.4 g/mol

VQ-022617

Reference Standard

Epoxy Exemestane (6-Beta Isomer) chemical structure

Epoxy Exemestane (6-Beta Isomer)

CAS: 152764-31-3
Formula: C₂₀H₂₄O₃
MW: 312.4 g/mol

VQ-021223

Reference Standard

Eprosartan Dimethyl Ester chemical structure

Eprosartan Dimethyl Ester

CAS: 133040-06-9
Formula: C₂₅H₂₈N₂O₄S
MW: 452.6 g/mol

VQ-043154

Reference Standard

Eprosartan Ethyl Methyl Diester chemical structure

Eprosartan Ethyl Methyl Diester

CAS: 133486-13-2
Formula: C₂₆H₃₀N₂O₄S
MW: 466.6 g/mol

VQ-034831

Reference Standard

Erdosteine Methyl Ester chemical structure

Erdosteine Methyl Ester

CAS: 1667709-77-4
Formula: C₉H₁₃NO₄S₂
MW: 263.3 g/mol

VQ-022549

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