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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

Selumetinib Impurity 21 chemical structure

Selumetinib Impurity 21

CAS: 606144-04-1
Formula: C₁₅H₁₀BrClFN₃O₂
MW: 398.61 g/mol

In stock

Reference Standard

Selumetinib Impurity-D chemical structure

Selumetinib Impurity-D

CAS: 3023039-86-0
Formula: C₂₁H₂₃BrClFN₄O₃
MW: 513.8 g/mol

VQ-042136

Reference Standard

Semaglutide Impurity 123 chemical structure

Semaglutide Impurity 123

CAS: 71997-93-8
Formula: C₂₃H₃₉NO₆
MW: 425.6 g/mol

VQ-045041

Reference Standard

Semaglutide Impurity 22 chemical structure

Semaglutide Impurity 22

CAS: 1118767-16-0
Formula: C₄₃H₇₉N₃O₁₃
MW: 846.1 g/mol

VQ-028002

Reference Standard

Semaglutide Impurity 6 (S-isomer) chemical structure

Semaglutide Impurity 6 (S-isomer)

CAS: 1671100-14-3
Formula: C₃₇H₆₈N₂O₁₀
MW: 700.9 g/mol

VQ-045349

Reference Standard

Sennidin B chemical structure

CAS: 517-44-2
Formula: C₃₀H₁₈O₁₀
MW: 538.5 g/mol

VQ-040103

Reference Standard

Sennoside B chemical structure

CAS: 128-57-4
Formula: C₄₂H₃₈O₂₀
MW: 862.7 g/mol

VQ-033816

Reference Standard

Sertraline 2-one

Sertraline 2-one

CAS: 944054-44-8
Formula: C₁₆H₁₂Cl₂O
MW: 291.17 g/mol

VQ-028011

Reference Standard

Sertraline 2,3-Dichloro Hydrochloride Isomer chemical structure

Sertraline 2,3-Dichloro Hydrochloride Isomer

CAS: 1198084-29-5
Formula: C₁₇H₁₈Cl₃N
MW: 342.7 g/mol

In stock

Reference Standard

Sertraline 2,3-Dichloro Isomer

Sertraline 2,3-Dichloro Isomer

CAS: 1198115-10-4
Formula: C₁₇H₁₇Cl₂N
MW: 306.23 g/mol

VQ-005873

Reference Standard

Sertraline 4-Chloro cis Racemic Mixture

Sertraline 4-Chloro cis Racemic Mixture

CAS: 2990115-94-9
Formula: C₁₇H₁₉Cl₂N
MW: 308.25 g/mol

VQ-042148

Reference Standard

Sertraline Dimethylamino Analog chemical structure

Sertraline Dimethylamino Analog

CAS: 79836-76-3
Formula: C₁₈H₂₀Cl₃N
MW: 356.7 g/mol

VQ-033820

Reference Standard

Sertraline Oxime Impurity chemical structure

Sertraline Oxime Impurity

CAS: 152642-35-8
Formula: C₁₆H₁₃Cl₂NO
MW: 306.2 g/mol

VQ-033819

Reference Standard

Sertraline Tetralone chemical structure

Sertraline Tetralone

CAS: 79560-19-3
Formula: C₁₆H₁₂Cl₂O
MW: 291.2 g/mol

VQ-028008

Reference Standard

Sertraline Tetralone Methanamine chemical structure

Sertraline Tetralone Methanamine

CAS: 79560-20-6
Formula: C₁₇H₁₅Cl₂N
MW: 304.2 g/mol

VQ-028007

Reference Standard

Sertraline Tetralone S-Isomer chemical structure

Sertraline Tetralone S-Isomer

CAS: 124379-29-9
Formula: C₁₆H₁₂Cl₂O
MW: 291.2 g/mol

VQ-033824

Reference Standard

Sesamol formiate chemical structure

Sesamol formiate

CAS: 80592-18-3
Formula: C₈H₈O₅
MW: 184.15 g/mol

VQ-042151

Reference Standard

Setmelanotide Impurity -1 chemical structure

Setmelanotide Impurity -1

CAS: 1304512-91-1
Formula: C₄₉H₇₀N₁₈O₉S₂
MW: 1119.3 g/mol

VQ-042152

Reference Standard

Sibutramine Impurity F chemical structure

Sibutramine Impurity F

CAS: 28049-61-8
Formula: C₁₁H₁₀ClN
MW: 191.65 g/mol

VQ-043713

Reference Standard

Sibutramine Impurity J chemical structure

Sibutramine Impurity J

CAS: 186521-85-7
Formula: C₁₅H₁₉ClO
MW: 250.76 g/mol

VQ-043293

Reference Standard

Sildenafil Aldehyde chemical structure

Sildenafil Aldehyde

CAS: 332374-42-2
Formula: C₁₄H₂₀N₂O₄S
MW: 312.39 g/mol

VQ-033838

Reference Standard

Sildenafil Amino Amide Impurity chemical structure

Sildenafil Amino Amide Impurity

CAS: 139756-02-8
Formula: C₈H₁₄N₄O
MW: 182.22 g/mol

VQ-023746

Reference Standard

Sildenafil Chlorosulfone Impurity chemical structure

Sildenafil Chlorosulfone Impurity

CAS: 139756-22-2
Formula: C₁₇H₁₉ClN₄O₄S
MW: 410.9 g/mol

VQ-023748

Reference Standard

Sildenafil Di-Amide Impurity chemical structure

Sildenafil Di-Amide Impurity

CAS: 139756-03-9
Formula: C₁₇H₂₂N₄O₃
MW: 330.4 g/mol

VQ-023747

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