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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

14,252products

1,516in stock

COA + SDSwith every lot

Reference Standard

Desloratadine Methanone Hydrochloride Impurity chemical structure

Desloratadine Methanone Hydrochloride Impurity

CAS: 119770-60-4
Formula: C₂₀H₂₄Cl₂N₂O
MW: 379.3 g/mol

VQ-030132

Reference Standard

Desloratadine Methanone Impurity chemical structure

Desloratadine Methanone Impurity

CAS: 130642-50-1
Formula: C₂₀H₂₃ClN₂O
MW: 342.9 g/mol

VQ-030134

Reference Standard

Desloratadine N-Acetyl Impurity chemical structure

Desloratadine N-Acetyl Impurity

CAS: 117796-52-8
Formula: C₂₁H₂₁ClN₂O
MW: 352.9 g/mol

VQ-025258

Reference Standard

Desloratadine N-Carboxylic Acid Methyl Ester Impurity chemical structure

Desloratadine N-Carboxylic Acid Methyl Ester Impurity

CAS: 165740-03-4
Formula: C₂₁H₂₁ClN₂O₂
MW: 368.9 g/mol

In stock

Reference Standard

Desloratadine N-Formyl Impurity chemical structure

Desloratadine N-Formyl Impurity

CAS: 117810-61-4
Formula: C₂₀H₁₉ClN₂O
MW: 338.8 g/mol

VQ-025252

Reference Standard

Desloratadine N-Hydroxy Impurity chemical structure

Desloratadine N-Hydroxy Impurity

CAS: 1193725-73-3
Formula: C₁₉H₁₉ClN₂O
MW: 326.8 g/mol

VQ-025253

Reference Standard

Desmethoxy Apixaban chemical structure

Desmethoxy Apixaban

CAS: 1801881-17-3
Formula: C₂₄H₂₃N₅O₃
MW: 429.5 g/mol

In stock

Reference Standard

Desmethoxy Bedaquiline chemical structure

Desmethoxy Bedaquiline

CAS: 2924118-10-3
Formula: C₃₁H₂₉BrN₂O₂
MW: 541.5 g/mol

VQ-024509

Reference Standard

Desmethoxy Esomeprazole Impurity

Desmethoxy Esomeprazole Impurity

CAS: 1432904-84-1
Formula: C₁₆H₁₇N₃O₂S
MW: 315.39 g/mol

VQ-004773

Reference Standard

Desmethoxy Keto Esomeprazole chemical structure

Desmethoxy Keto Esomeprazole

CAS: 2362529-32-4
Formula: C₁₆H₁₇N₃O₃S
MW: 331.4 g/mol

VQ-025614

Reference Standard

Desmethoxy Ranolazine chemical structure

Desmethoxy Ranolazine

CAS: 755711-09-2
Formula: C₂₃H₃₁N₃O₃
MW: 397.5 g/mol

In stock

Reference Standard

Desmopressin Parallel Dimer Impurity

Desmopressin Parallel Dimer Impurity

CAS: 2764860-88-8
Formula: C₉₂H₁₂₈N₂₈O₂₄S₄
MW: 2138.4 g/mol

VQ-047994

Reference Standard

Desmosterol Sulfate chemical structure

Desmosterol Sulfate

CAS: 54378-86-8
Formula: C₂₇H₄₄O₄S
MW: 464.7 g/mol

VQ-043494

Reference Standard

Desogestrel 13-beta-methyl Impurity

Desogestrel 13-beta-methyl Impurity

CAS: 882297-86-1
Formula: C₂₁H₂₈O₂
MW: 312.45 g/mol

VQ-044101

Reference Standard

Desonide chemical structure

CAS: 638-94-8
Formula: C₂₄H₃₂O₆
MW: 416.5 g/mol

VQ-021908

Reference Standard

Desonide 21-Aldehyde chemical structure

Desonide 21-Aldehyde

CAS: 57171-18-3
Formula: C₂₄H₃₀O₆
MW: 414.5 g/mol

VQ-024673

Reference Standard

Desosaminylazithromycin chemical structure

Desosaminylazithromycin

CAS: 117693-41-1
Formula: C₃₀H₅₈N₂O₉
MW: 590.8 g/mol

VQ-020879

Reference Standard

Desoximetasone Impurity A chemical structure

Desoximetasone Impurity A

CAS: 61618-63-1
Formula: C₂₁H₂₅FO₄
MW: 360.4 g/mol

VQ-036640

Reference Standard

Desoxo-palbociclib chemical structure

Desoxo-palbociclib

CAS: 2204863-06-7
Formula: C₂₄H₂₉N₇O
MW: 431.5 g/mol

VQ-004775

Reference Standard

Desoxo-Palbociclib Hydrochloride

Desoxo-Palbociclib Hydrochloride

Formula: C₂₄H₂₉N₇O.ClH
MW: 467.99 g/mol

In stock

Reference Standard

Desoxy Ilaprazole chemical structure

Desoxy Ilaprazole

CAS: 172152-35-1
Formula: C₁₉H₁₈N₄OS
MW: 350.4 g/mol

VQ-027175

Reference Standard

Despiperazine Amino Norfloxacin chemical structure

Despiperazine Amino Norfloxacin

CAS: 75001-63-7
Formula: C₁₂H₁₁FN₂O₃
MW: 250.23 g/mol

VQ-032214

Reference Standard

Despropylene Gatifloxacin chemical structure

Despropylene Gatifloxacin

CAS: 172426-86-7
Formula: C₁₆H₁₈FN₃O₄
MW: 335.33 g/mol

VQ-025960

Reference Standard

Destrifluoro Ethoxy Lansoprazole chemical structure

Destrifluoro Ethoxy Lansoprazole

CAS: 60524-97-2
Formula: C₁₄H₁₃N₃OS
MW: 271.34 g/mol

VQ-026361

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