Eosin b(2-)

Base Information

• Chemical Name: Eosin b(2-)
• CAS No.: 56360-46-4
• Molecular Formula: C20H8 Br2 N2 O9
• Molecular Weight: 578.0787
• Hs Code.: 32041200
• Wikidata: Q27137049
• Mol file: 56360-46-4.mol

Synonyms:eosin b(2-);56360-46-4;4',5'-dibromo-2',7'-dinitro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate;CHEBI:68617;Q27137049;4',5'-dibromo-2',7'-dinitro-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate

Chemical Property of Eosin b(2-)

Chemical Property:

• Melting Point: 275 °C (dec.)(lit.)
• Boiling Point: 663.6 °C at 760 mmHg
• PKA: 5.98±0.20(Predicted)
• Flash Point: 355.1 °C
• PSA: 179.38000
• Density: g/cm³
• LogP: 6.35640
• Solubility.: spirit: soluble
• XLogP3: 5.8
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 9
• Rotatable Bond Count: 0
• Exact Mass: 577.84196
• Heavy Atom Count: 33
• Complexity: 804

Purity/Quality:

98%min ^*data from raw suppliers

EosinBSpiritSoluble ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xn
• Hazard Codes: Xn
• Statements: 22-21/22
• Safety Statements: 22-24/25-36/37

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: C1=CC=C2C(=C1)C(=O)OC23C4=CC(=C(C(=C4OC5=C(C(=C(C=C35)[N+](=O)[O-])[O-])Br)Br)[O-])[N+](=O)[O-]

Technology Process of Eosin b(2-)

There total 8 articles about Eosin b(2-) which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 90.0%

4',5'-dibromofluorescein (596-03-2) → 2,7-dinitro-4,5-dibromofluorescein (56360-46-4)

Guidance literature:

With sulfuric acid; nitric acid; at 0 - 20 ℃; for 12h;

DOI:10.3762/bjoc.13.52

Reference yield:

→ 2,7-dinitro-4,5-dibromofluorescein (56360-46-4)

Guidance literature:

With sulfuric acid; nitric acid; at 0 ℃;

Reference yield:

eosin y (15086-94-9) → 2,7-dinitro-4,5-dibromofluorescein (56360-46-4)

Guidance literature:

With ethanol; nitric acid;

upstream raw materials:

eosin y

phthalic anhydride

2-(2,4-dihydroxybenzoyl)benzoic acid

recorcinol

Downstream raw materials:

ethyl 2-(2',7'-dibromo-6'-hydroxy-4',5'-dinitro-3'-oxo-3H-xanthen-9'-yl)benzoate

Refernces