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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

Sodium Aminosalicylate Dihydrate chemical structure

Sodium Aminosalicylate Dihydrate

CAS: 6018-19-5
Formula: C₇H₁₀NNaO₅
MW: 211.15 g/mol

VQ-033891

Reference Standard

Sodium Cromoglicate chemical structure

Sodium Cromoglicate

CAS: 15826-37-6
Formula: C₂₃H₁₄Na₂O₁₁
MW: 512.3 g/mol

VQ-028064

Reference Standard

Sodium diethyldithiocarbamate chemical structure

Sodium diethyldithiocarbamate

CAS: 148-18-5
Formula: C₅H₁₀NNaS₂
MW: 171.3 g/mol

VQ-039553

Reference Standard

Sodium fluoroacetate chemical structure

Sodium fluoroacetate

CAS: 62-74-8
Formula: C₂H₂FNaO₂
MW: 100.02 g/mol

VQ-045197

Reference Standard

Sodium Fusidate chemical structure

Sodium Fusidate

CAS: 751-94-0
Formula: C₃₁H₄₇NaO₆
MW: 538.7 g/mol

VQ-030914

Reference Standard

Sodium Myristoyl Sarcosinate chemical structure

Sodium Myristoyl Sarcosinate

CAS: 30364-51-3
Formula: C₁₇H₃₂NNaO₃
MW: 321.4 g/mol

VQ-038965

Reference Standard

Sodium Picosulfate - Impurity B chemical structure

Sodium Picosulfate - Impurity B

CAS: 603-41-8
Formula: C₁₈H₁₅NO₂
MW: 277.3 g/mol

VQ-020971

Reference Standard

Sodiumoxybatediterephthalate Impurity

Sodiumoxybatediterephthalate Impurity

Formula: C₁₆H₁₈O₈
MW: 338.31 g/mol

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Reference Standard

Sofosbuvir 3'-O-Phosphoramidate chemical structure

Sofosbuvir 3'-O-Phosphoramidate

CAS: 1337482-15-1
Formula: C₂₂H₂₉FN₃O₉P
MW: 529.5 g/mol

VQ-023778

Reference Standard

Sofosbuvir 3',5'-Bis-(S)-phosphate chemical structure

Sofosbuvir 3',5'-Bis-(S)-phosphate

CAS: 1337482-17-3
Formula: C₃₄H₄₅FN₄O₁₃P₂
MW: 798.7 g/mol

VQ-023777

Reference Standard

Sofosbuvir Dibenzoyl Lactone Impurity chemical structure

Sofosbuvir Dibenzoyl Lactone Impurity

CAS: 1157884-58-6
Formula: C₂₀H₁₇FO₆
MW: 372.3 g/mol

VQ-033897

Reference Standard

Sofosbuvir Dimer

Sofosbuvir Dimer

CAS: 1256490-29-5
Formula: C₃₄H₄₅FN₄O₁₃P₂
MW: 798.69 g/mol

VQ-045130

Reference Standard

Sofosbuvir Impurity chemical structure

Sofosbuvir Impurity

CAS: 1496551-65-5
Formula: C₂₀H₁₇ClO₆
MW: 388.8 g/mol

VQ-033902

Reference Standard

Sofosbuvir Impurity 110 chemical structure

Sofosbuvir Impurity 110

CAS: 1392015-05-2
Formula: C₁₇H₁₅F₅NO₅P
MW: 439.27 g/mol

VQ-033901

Reference Standard

Sofosbuvir impurity 3

Sofosbuvir impurity 3

CAS: 863329-62-8
Formula: C₂₀H₁₉FO₆
MW: 374.4 g/mol

VQ-035547

Reference Standard

Sofosbuvir Impurity, 1-β-D-Arabinofuranosyluracil-2-C-methyl chemical structure

Sofosbuvir Impurity, 1-β-D-Arabinofuranosyluracil-2-C-methyl

CAS: 114262-49-6
Formula: C₁₀H₁₄N₂O₆
MW: 258.23 g/mol

VQ-045351

Reference Standard

Sofosbuvir IP Impurity A chemical structure

Sofosbuvir IP Impurity A

CAS: 1190308-01-0
Formula: C₂₂H₂₉FN₃O₉P
MW: 529.5 g/mol

VQ-021346

Reference Standard

Sofosbuvir L-alanitate (Mixture of Diasteriomers) chemical structure

Sofosbuvir L-alanitate (Mixture of Diasteriomers)

CAS: 1064684-44-1
Formula: C₂₂H₂₉FN₃O₉P
MW: 529.5 g/mol

VQ-033895

Reference Standard

Sofosbuvir Methylene Impurity chemical structure

Sofosbuvir Methylene Impurity

CAS: 863329-63-9
Formula: C₃₁H₂₅N₃O₇
MW: 551.5 g/mol

VQ-035548

Reference Standard

Solifenacin Impurity

Solifenacin Impurity

CAS: 1229227-22-8
Formula: C₂₂H₁₈N₂O₄
MW: 374.39 g/mol

VQ-028078

Reference Standard

Solifenacin Impurity 45 chemical structure

Solifenacin Impurity 45

CAS: 1243274-81-8
Formula: C₁₄H₁₆N₂O₅
MW: 292.29 g/mol

VQ-033917

Reference Standard

Solriamfetol S-Enantiomer Impurity chemical structure

Solriamfetol S-Enantiomer Impurity

CAS: 178429-66-8
Formula: C₁₀H₁₅ClN₂O₂
MW: 230.69 g/mol

VQ-033920

Reference Standard

Sorafenib Carboxylic Acid Methyl Ester chemical structure

Sorafenib Carboxylic Acid Methyl Ester

CAS: 573673-43-5
Formula: C₂₁H₁₅ClF₃N₃O₄
MW: 465.8 g/mol

VQ-044607

Reference Standard

Sorafenib Impurity B chemical structure

Sorafenib Impurity B

CAS: 2004659-84-9
Formula: C₁₄H₁₃N₃O₃
MW: 271.27 g/mol

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