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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

Dihydrodaunomycin Hydrochloride chemical structure

Dihydrodaunomycin Hydrochloride

CAS: 28008-53-9
Formula: C₂₇H₃₂ClNO₁₀
MW: 566 g/mol

VQ-036592

Reference Standard

Dihydrodesonide chemical structure

Dihydrodesonide

CAS: 638-93-7
Formula: C₂₄H₃₄O₆
MW: 418.5 g/mol

VQ-021911

Reference Standard

Dihydroergotamine Impurity S2 chemical structure

Dihydroergotamine Impurity S2

CAS: 81149-12-4
Formula: C₃₂H₃₇N₅O₆
MW: 587.7 g/mol

VQ-045308

Reference Standard

Dihydroisopimaric Acid chemical structure

Dihydroisopimaric Acid

CAS: 5673-36-9
Formula: C₂₀H₃₂O₂
MW: 304.5 g/mol

VQ-040635

Reference Standard

Dihydromyricetin chemical structure

Dihydromyricetin

CAS: 27200-12-0
Formula: C₁₅H₁₂O₈
MW: 320.25 g/mol

VQ-027266

Reference Standard

Dihydronarwedine chemical structure

Dihydronarwedine

CAS: 21041-10-1
Formula: C₁₇H₂₁NO₃
MW: 287.35 g/mol

VQ-025956

Reference Standard

Dihydropenicillin F chemical structure

Dihydropenicillin F

CAS: 4493-18-9
Formula: C₁₄H₂₂N₂O₄S
MW: 314.4 g/mol

VQ-033094

Reference Standard

Dihydroresveratrol chemical structure

Dihydroresveratrol

CAS: 58436-28-5
Formula: C₁₄H₁₄O₃
MW: 230.26 g/mol

VQ-036330

Reference Standard

Dihydrostreptomycin Sesquisulfate chemical structure

Dihydrostreptomycin Sesquisulfate

CAS: 5490-27-7
Formula: C₄₂H₈₈N₁₄O₃₆S₃
MW: 1461.4 g/mol

VQ-033952

Reference Standard

Dihydrotestosterone Tridecanoate chemical structure

Dihydrotestosterone Tridecanoate

CAS: 488836-66-4
Formula: C₃₂H₅₄O₃
MW: 486.8 g/mol

VQ-042452

Reference Standard

Dihydrovitamin K1 Diacetate chemical structure

Dihydrovitamin K1 Diacetate

CAS: 604-87-5
Formula: C₃₅H₅₂O₄
MW: 536.8 g/mol

VQ-033165

Reference Standard

Dihydroxy Etravirine chemical structure

Dihydroxy Etravirine

CAS: 1246818-67-6
Formula: C₂₀H₁₅BrN₆O₃
MW: 467.3 g/mol

VQ-037157

Reference Standard

Dihydroxy Moxonidine chemical structure

Dihydroxy Moxonidine

CAS: 352457-32-0
Formula: C₈H₁₁N₅O₂
MW: 209.21 g/mol

VQ-032021

Reference Standard

Dihydroxyadamantane chemical structure

Dihydroxyadamantane

CAS: 28996-06-7
Formula: C₁₀H₁₆O₂
MW: 168.23 g/mol

VQ-029030

Reference Standard

Diisobutyl Phthalate chemical structure

Diisobutyl Phthalate

CAS: 84-69-5
Formula: C₁₆H₂₂O₄
MW: 278.34 g/mol

VQ-032489

Reference Standard

Diisopropyl 3,3-dimethoxycyclobutane-1,1-dicarboxylate chemical structure

Diisopropyl 3,3-dimethoxycyclobutane-1,1-dicarboxylate

CAS: 115118-68-8
Formula: C₁₄H₂₄O₆
MW: 288.34 g/mol

VQ-039878

Reference Standard

Diisopropyl Adipate chemical structure

Diisopropyl Adipate

CAS: 6938-94-9
Formula: C₁₂H₂₂O₄
MW: 230.3 g/mol

VQ-039082

Reference Standard

Diisopropyl bicarbamate chemical structure

Diisopropyl bicarbamate

CAS: 19740-72-8
Formula: C₈H₁₆N₂O₄
MW: 204.22 g/mol

VQ-027032

Reference Standard

Diisopropyl Tenofovir chemical structure

Diisopropyl Tenofovir

CAS: 160616-04-6
Formula: C₁₅H₂₆N₅O₄P
MW: 371.37 g/mol

VQ-042425

Reference Standard

Diltiazem DTZ-I Impurity chemical structure

Diltiazem DTZ-I Impurity

CAS: 30842-48-9
Formula: C₁₉H₁₉NO₄S
MW: 357.4 g/mol

VQ-036706

Reference Standard

Diltiazem Impurity chemical structure

Diltiazem Impurity

CAS: 42399-48-4
Formula: C₁₆H₁₇NO₄S
MW: 319.4 g/mol

VQ-030212

Reference Standard

Diltiazem Impurity G (Stage-1)

Diltiazem Impurity G (Stage-1)

Formula: C₂₄H₂₇ClN₂O₆S
MW: 507 g/mol

In stock

Reference Standard

Dimepranol Acedoben chemical structure

Dimepranol Acedoben

CAS: 61990-51-0
Formula: C₁₄H₂₂N₂O₄
MW: 282.34 g/mol

VQ-024143

Reference Standard

Dimercaprol chemical structure

CAS: 59-52-9
Formula: C₃H₈OS₂
MW: 124.23 g/mol

VQ-048025

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