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81-98-1

Basic Information
CAS No.: 81-98-1
Name: 3,9-Dibromobenzanthrone
Molecular Structure:
Molecular Structure of 81-98-1 (3,9-Dibromobenzanthrone)
Formula: C17H8 Br2 O
Molecular Weight: 388.058
Synonyms: 3,9-Dibromo-7-oxo-7H-benz[de]anthracene;3,9-Dibromo-7H-benz[de]anthracen-7-one; 3,9-Dibromobenzanthrone; NSC 84191
EINECS: 201-391-2
Density: 1.836g/cm3
Melting Point: 255~256℃
Boiling Point: 535.5°C at 760 mmHg
Flash Point: 178.2°C
Solubility: insoluble AUTOIGNITION
Appearance: brown to green powder
Hazard Symbols: UN NO.
Transport Information: REM
PSA: 17.07000
LogP: 5.57620
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Chemistry

MF: C18H10Br2O
MW: 402.08
EINECS: 201-391-2
Density: 1.836 g/cm3 
Flash Point: 178.2 °C 
Melting Point: 255~256℃
Index of Refraction: 1.762 
Enthalpy of Vaporization: 81.2 kJ/mol 
Boiling Point: 535.5 °C at 760 mmHg 
Vapour Pressure: 1.52E-11 mmHg at 25°C 
Appearance: Yellow needle crystal
IUPAC Name: 3,9-Dibromobenzo[a]phenalen-7-one
Solubility: Soluble in chlorobenzene, trichloroacetic acid, nitric acid, insoluble in water and ethanol.
Synonyms: 2,7-Dibromomesobenzanthrone ; 3,9-Dibrombenzanthrone ; 3,9-Dibromo-7h-benz(de)anthracen-7-one ; 3,9-Dibromo-7h-benz[de]anthracen-7-on ; 6-bz-1-dibrombenzanthron
Following is the molecular structure of 3,9-Dibromo-7h-benz(de)anthracen-7-one (CAS NO.81-98-1):

Uses

3,9-Dibromo-7h-benz(de)anthracen-7-one (CAS NO.81-98-1) is used to restore the gray for the production of M, to restore the olive green T and other dye intermediates.

Production

 3,9-Dibromo-7h-benz(de)anthracen-7-one (CAS NO.81-98-1) is formed by benzene around the anthrone by the bromide. Consumption of raw materials fixed: benzene around the anthrone 764kg / t, bromine 782kg / t.

Toxicity Data With Reference

1.    

eye-rbt 500 mg/24H MLD

    28ZPAK    Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,89.
2.    

ipr-rat LD50:4900 mg/kg

    RPTOAN    Russian Pharmacology and Toxicology. Translation of FATOAO. 40 (1977),137.
3.    

ipr-mus LD50:1410 mg/kg

    RPTOAN    Russian Pharmacology and Toxicology. Translation of FATOAO. 40 (1977),137.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by intraperitoneal route. An eye irritant. When heated to decomposition it emits toxic fumes of Br.