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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

Spiramycin III chemical structure

CAS: 24916-52-7
Formula: C₄₆H₇₈N₂O₁₅
MW: 899.1 g/mol

VQ-028108

Reference Standard

Spiroalmotriptan chemical structure

Spiroalmotriptan

CAS: 1309457-18-8
Formula: C₁₇H₂₅N₃O₃S
MW: 351.5 g/mol

VQ-020760

Reference Standard

Stauprimide chemical structure

CAS: 154589-96-5
Formula: C₃₅H₂₈N₄O₅
MW: 584.6 g/mol

VQ-023129

Reference Standard

Staurosporine chemical structure

CAS: 62996-74-1
Formula: C₂₈H₂₆N₄O₃
MW: 466.5 g/mol

VQ-033944

Reference Standard

Staurosporine Aglycone chemical structure

Staurosporine Aglycone

CAS: 85753-43-1
Formula: C₂₀H₁₃N₃O
MW: 311.3 g/mol

VQ-038397

Reference Standard

Stavudine chemical structure

CAS: 3056-17-5
Formula: C₁₀H₁₂N₂O₄
MW: 224.21 g/mol

VQ-023794

Reference Standard

Stearidonic Acid Ethyl Ester chemical structure

Stearidonic Acid Ethyl Ester

CAS: 119798-44-6
Formula: C₂₀H₃₂O₂
MW: 304.5 g/mol

VQ-032420

Reference Standard

Stigmasta-5,22-dien-3-ol, 3-tetradecanoate, (3β,22E)

Stigmasta-5,22-dien-3-ol, 3-tetradecanoate, (3β,22E)

CAS: 20242-98-2
Formula: C₄₃H₇₄O₂
MW: 623.1 g/mol

VQ-044379

Reference Standard

Stiripentol Hydroxy dimer impurity

Stiripentol Hydroxy dimer impurity

CAS: 2098981-22-5
Formula: C₁₉H₁₆O₅
MW: 324.33 g/mol

VQ-033949

Reference Standard

Stiripentol Iso butyl Alcohol Impurity chemical structure

Stiripentol Iso butyl Alcohol Impurity

CAS: 58344-90-4
Formula: C₁₄H₁₈O₃
MW: 234.29 g/mol

VQ-042271

Reference Standard

Stiripentol Iso Butyl Keto Impurity chemical structure

Stiripentol Iso Butyl Keto Impurity

CAS: 56750-95-9
Formula: C₁₄H₁₆O₃
MW: 232.27 g/mol

VQ-042272

Reference Standard

Stiripentol Tert-Keto Impurity chemical structure

Stiripentol Tert-Keto Impurity

CAS: 78074-39-2
Formula: C₁₄H₁₈O₃
MW: 234.29 g/mol

VQ-033947

Reference Standard

Stiripentol Z-isomer

Stiripentol Z-isomer

CAS: 2548512-69-0
Formula: C₁₄H₁₈O₃
MW: 234.3 g/mol

VQ-033948

Reference Standard

Streptomycin B chemical structure

CAS: 128-45-0
Formula: C₂₇H₄₉N₇O₁₇
MW: 743.7 g/mol

VQ-033953

Reference Standard

Succinaldehyde chemical structure

CAS: 638-37-9
Formula: C₄H₆O₂
MW: 86.09 g/mol

VQ-039630

Reference Standard

Succinyl Monocholine Chloride chemical structure

Succinyl Monocholine Chloride

CAS: 5297-17-6
Formula: C₉H₁₈ClNO₄
MW: 239.69 g/mol

VQ-032728

Reference Standard

Sucrose 4,6-Methyl Orthoester chemical structure

Sucrose 4,6-Methyl Orthoester

CAS: 116015-72-6
Formula: C₁₅H₂₆O₁₂
MW: 398.36 g/mol

VQ-028128

Reference Standard

Sucrose 6`-Acetate chemical structure

Sucrose 6`-Acetate

CAS: 936001-72-8
Formula: C₁₄H₂₄O₁₂
MW: 384.33 g/mol

VQ-028129

Reference Standard

Sucrose 6,6'-Dicarboxylic Acid chemical structure

Sucrose 6,6'-Dicarboxylic Acid

CAS: 133634-70-5
Formula: C₁₂H₁₈O₁₃
MW: 370.26 g/mol

VQ-042280

Reference Standard

Sucrose 6'-Carboxylic Acid chemical structure

Sucrose 6'-Carboxylic Acid

CAS: 133634-69-2
Formula: C₁₂H₂₀O₁₂
MW: 356.28 g/mol

VQ-042281

Reference Standard

Sucrose Octasulfate Ammonium Salt chemical structure

Sucrose Octasulfate Ammonium Salt

CAS: 74135-13-0
Formula: C₁₂H₄₆N₈O₃₅S₈
MW: 1119.1 g/mol

VQ-043307

Reference Standard

Sucrose Octasulfate Potassium Salt chemical structure

Sucrose Octasulfate Potassium Salt

CAS: 73264-44-5
Formula: C₁₂H₂₈K₈O₄₂S₈
MW: 1413.7 g/mol

VQ-028123

Reference Standard

Sugammadex Dimethyl amino Impurity

Sugammadex Dimethyl amino Impurity

CAS: 2412952-85-1
Formula: C₇₁H₁₁₃NO₄₆S₇
MW: 1941.09 g/mol

VQ-042283

Reference Standard

Sugammadex Ethyl Ester Impurity

Sugammadex Ethyl Ester Impurity

CAS: 2412952-87-3
Formula: C₇₄H₁₁₆O₄₈S₈
MW: 2030.2 g/mol

VQ-033960

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