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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

Drospirenone 3,5,5`-Triol chemical structure

Drospirenone 3,5,5`-Triol

CAS: 1079392-41-8
Formula: C₂₄H₃₆O₄
MW: 388.5 g/mol

VQ-030324

Reference Standard

Drospirenone 5,5-Diol chemical structure

Drospirenone 5,5-Diol

CAS: 863329-70-8
Formula: C₂₄H₃₄O₄
MW: 386.5 g/mol

VQ-044121

Reference Standard

Drospirenone Acid chemical structure

Drospirenone Acid

CAS: 776251-13-9
Formula: C₂₄H₃₂O₄
MW: 384.5 g/mol

VQ-036841

Reference Standard

Drospirenone Diol Impurity chemical structure

Drospirenone Diol Impurity

CAS: 69651-50-9
Formula: C₂₄H₃₄O₃
MW: 370.5 g/mol

VQ-025420

Reference Standard

Drospirenone Ether Impurity chemical structure

Drospirenone Ether Impurity

CAS: 90376-21-9
Formula: C₂₄H₃₂O₂
MW: 352.5 g/mol

VQ-036838

Reference Standard

Drospirenone Impurity 3 chemical structure

Drospirenone Impurity 3

CAS: 863329-69-5
Formula: C₂₅H₃₅BrO₄
MW: 479.4 g/mol

VQ-030322

Reference Standard

Drotaveraldine chemical structure

CAS: 54088-62-9
Formula: C₂₄H₂₉NO₅
MW: 411.5 g/mol

VQ-022463

Reference Standard

Drotaverine Amine Impurity chemical structure

Drotaverine Amine Impurity

CAS: 61381-04-2
Formula: C₁₂H₁₉NO₂
MW: 209.28 g/mol

VQ-030326

Reference Standard

Droxidopa Amine

Droxidopa Amine

CAS: 55637-52-0
Formula: C₂₃H₂₃NO₅
MW: 393.4 g/mol

VQ-025429

Reference Standard

Droxidopa BBC Impurity (HCl salt) chemical structure

Droxidopa BBC Impurity (HCl salt)

CAS: 1021462-91-8
Formula: C₂₅H₂₄Cl₂N₂O₂
MW: 455.4 g/mol

VQ-025433

Reference Standard

Droxidopa Enantiomer Impurity chemical structure

Droxidopa Enantiomer Impurity

CAS: 51829-99-3
Formula: C₉H₁₁NO₅
MW: 213.19 g/mol

VQ-025434

Reference Standard

Duborimycin chemical structure

CAS: 28008-55-1
Formula: C₂₇H₃₁NO₁₀
MW: 529.5 g/mol

VQ-036586

Reference Standard

Duloxetine 2-Naphthalenol Impurity chemical structure

Duloxetine 2-Naphthalenol Impurity

CAS: 1346599-09-4
Formula: C₁₈H₁₉NOS
MW: 297.4 g/mol

VQ-025446

Reference Standard

Duloxetine Chloro Impurity chemical structure

Duloxetine Chloro Impurity

CAS: 1104890-93-8
Formula: C₁₇H₁₅ClOS
MW: 302.8 g/mol

VQ-036852

Reference Standard

Duloxetine Impurity (alpha-Hydroxy) chemical structure

Duloxetine Impurity (alpha-Hydroxy)

CAS: 940291-11-2
Formula: C₁₈H₁₉NOS
MW: 297.4 g/mol

VQ-035204

Reference Standard

Duloxetine Impurity 5 chemical structure

Duloxetine Impurity 5

CAS: 645411-16-1
Formula: C₈H₁₂ClNOS
MW: 205.71 g/mol

In stock

Reference Standard

Duloxetine Impurity 5 (Freebase) chemical structure

Duloxetine Impurity 5 (Freebase)

CAS: 667465-15-8
Formula: C₈H₁₁NOS
MW: 169.25 g/mol

VQ-004828

Reference Standard

Duloxetine N-methyl (R)-isomer oxalate chemical structure

Duloxetine N-methyl (R)-isomer oxalate

CAS: 932013-45-1
Formula: C₂₁H₂₃NO₅S
MW: 401.5 g/mol

VQ-045312

Reference Standard

Duloxetine R-Hydroxy Impurity chemical structure

Duloxetine R-Hydroxy Impurity

CAS: 132335-49-0
Formula: C₉H₁₅NOS
MW: 185.29 g/mol

VQ-036848

Reference Standard

Duloxetine Related Compound A chemical structure

Duloxetine Related Compound A

CAS: 116539-60-7
Formula: C₁₈H₁₉NOS
MW: 297.4 g/mol

In stock

Reference Standard

Duloxetine-2 Hydroxy Impurity

Duloxetine-2 Hydroxy Impurity

Formula: C₁₈H₁₉NOS
MW: 297.41 g/mol

In stock

Reference Standard

Dutasteride Chloro Impurity chemical structure

Dutasteride Chloro Impurity

CAS: 1365545-42-1
Formula: C₂₇H₃₁ClF₆N₂O₂
MW: 565 g/mol

VQ-022466

Reference Standard

DXD chemical structure

CAS: 1599440-33-1
Formula: C₂₆H₂₄FN₃O₆
MW: 493.5 g/mol

VQ-030648

Reference Standard

DXD Racemic Standard (Droxidopa) chemical structure

DXD Racemic Standard (Droxidopa)

CAS: 492-46-6
Formula: C₉H₁₁NO₅
MW: 213.19 g/mol

VQ-025430

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