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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

Daclatasvir Impurity C chemical structure

Daclatasvir Impurity C

CAS: 1256385-55-3
Formula: C₂₉H₃₂N₆O₃
MW: 512.6 g/mol

VQ-036507

Reference Standard

Daclatasvir Impurity F chemical structure

Daclatasvir Impurity F

CAS: 2077207-88-4
Formula: C₄₁H₅₂N₈O₆
MW: 752.9 g/mol

VQ-025151

Reference Standard

Daclatasvir Impurity-B chemical structure

Daclatasvir Impurity-B

CAS: 1009117-26-3
Formula: C₄₀H₅₀N₈O₆
MW: 738.9 g/mol

VQ-025155

Reference Standard

Daclatasvir Oxazolidine Impurity chemical structure

Daclatasvir Oxazolidine Impurity

CAS: 1085706-72-4
Formula: C₄₀H₄₉N₇O₇
MW: 739.9 g/mol

VQ-047920

Reference Standard

Daclatasvir RRRR Isomer chemical structure

Daclatasvir RRRR Isomer

CAS: 1417333-58-4
Formula: C₄₀H₅₀N₈O₆
MW: 738.9 g/mol

VQ-022299

Reference Standard

Daclatasvir RRSS Isomer chemical structure

Daclatasvir RRSS Isomer

CAS: 1009117-94-5
Formula: C₄₀H₅₀N₈O₆
MW: 738.9 g/mol

VQ-043691

Reference Standard

Daclatasvir RSSS Isomer chemical structure

Daclatasvir RSSS Isomer

CAS: 1417333-83-5
Formula: C₄₀H₅₀N₈O₆
MW: 738.9 g/mol

VQ-022300

Reference Standard

Daclatasvir SRSS Isomer chemical structure

Daclatasvir SRSS Isomer

CAS: 1009117-28-5
Formula: C₄₀H₅₀N₈O₆
MW: 738.9 g/mol

VQ-025152

Reference Standard

Dacomitinib Amide Impurity

Dacomitinib Amide Impurity

CAS: 1456520-25-4
Formula: C₁₈H₂₂N₄O₃
MW: 342.39 g/mol

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Reference Standard

Dacomitinib Z-Isomer

Dacomitinib Z-Isomer

Formula: C₂₄H₂₅ClFN₅O₂
MW: 469.94 g/mol

In stock

Reference Standard

Daidzin chemical structure

CAS: 552-66-9
Formula: C₂₁H₂₀O₉
MW: 416.4 g/mol

VQ-030003

Reference Standard

Dalbavancin A0 chemical structure

CAS: 171500-81-5
Formula: C₈₇H₉₈Cl₂N₁₀O₂₈
MW: 1802.7 g/mol

VQ-025156

Reference Standard

Dalbavancin A1 chemical structure

CAS: 171500-80-4
Formula: C₈₇H₉₈Cl₂N₁₀O₂₈
MW: 1802.7 g/mol

VQ-025157

Reference Standard

Dalbavancin B1 chemical structure

CAS: 171500-82-6
Formula: C₈₈H₁₀₀Cl₂N₁₀O₂₈
MW: 1816.7 g/mol

VQ-030006

Reference Standard

Dalbavancin B2 chemical structure

CAS: 871132-03-5
Formula: C₈₉H₁₀₂Cl₂N₁₀O₂₈
MW: 1830.7 g/mol

VQ-030007

Reference Standard

Dalbavancin Impurity 7

Dalbavancin Impurity 7

CAS: 171500-90-6
Formula: C₈₈H₁₀₀Cl₂N₁₀O₂₈
MW: 1816.7 g/mol

VQ-047921

Reference Standard

DAMPA Methyl Ester chemical structure

DAMPA Methyl Ester

CAS: 23853-09-0
Formula: C₁₆H₁₇N₇O₂
MW: 339.35 g/mol

VQ-043130

Reference Standard

Dansylamidoethyl Mercaptan chemical structure

Dansylamidoethyl Mercaptan

CAS: 5354-61-0
Formula: C₁₄H₁₈N₂O₂S₂
MW: 310.4 g/mol

VQ-050546

Reference Standard

Dantrolene, Sodium Salt Hemiheptahydrate chemical structure

Dantrolene, Sodium Salt Hemiheptahydrate

CAS: 24868-20-0
Formula: C₂₈H₃₂N₈Na₂O₁₇
MW: 798.6 g/mol

VQ-030015

Reference Standard

Dapagliflozin (RS) Furanose chemical structure

Dapagliflozin (RS) Furanose

CAS: 2271248-78-1
Formula: C₂₁H₂₅ClO₆
MW: 408.9 g/mol

VQ-030020

Reference Standard

Dapagliflozin 1-Bromo, 4-Chlorobenzene Impurity chemical structure

Dapagliflozin 1-Bromo, 4-Chlorobenzene Impurity

CAS: 1629862-21-0
Formula: C₁₅H₁₄BrClO
MW: 325.63 g/mol

VQ-030026

Reference Standard

Dapagliflozin 1,4-Dichlorobenzene Impurity chemical structure

Dapagliflozin 1,4-Dichlorobenzene Impurity

CAS: 2069934-29-6
Formula: C₁₅H₁₄Cl₂O
MW: 281.2 g/mol

VQ-025174

Reference Standard

Dapagliflozin 4-bromo tetraacetate impurity chemical structure

Dapagliflozin 4-bromo tetraacetate impurity

CAS: 1807632-96-7
Formula: C₂₉H₃₃BrO₁₀
MW: 621.5 g/mol

VQ-044412

Reference Standard

Dapagliflozin 4-bromo-2-chlorobenzene Impurity chemical structure

Dapagliflozin 4-bromo-2-chlorobenzene Impurity

CAS: 2454263-77-3
Formula: C₁₅H₁₄BrClO
MW: 325.63 g/mol

VQ-036528

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