Benzanthrone Property

Melting point:

168-170 °C(lit.)

Boiling point:

332.25°C (rough estimate)

Density 

1.0929 (rough estimate)

refractive index 

1.5000 (estimate)

storage temp. 

Sealed in dry,Room Temperature

solubility 

Chloroform (Slightly), Methanol (Slightly, Sonicated)

form 

Solid

color 

Light Yellow to Yellow

Merck 

14,1063

BRN 

1455646

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

82-05-3(CAS DataBase Reference)

NIST Chemistry Reference

Benzanthone(82-05-3)

EPA Substance Registry System

Benzanthrone (82-05-3)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39-37

WGK Germany 

3

RTECS 

CX5075000

TSCA 

Yes

HS Code 

29145090

Hazardous Substances Data

82-05-3(Hazardous Substances Data)

Toxicity

LD50 in albino rabbits: >3 g/kg dermally; LD50 in rats, mice (g/kg): 1.5, 0.29 i.p. (Singh)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

Benzanthrone Chemical Properties,Usage,Production

Chemical Properties

light yellow powder

Uses

hepatotoxic, P450 suppressant

Uses

Benzanthrone is reducing agent such as iron. Benzanthrone is an important intermediate for manufacturing vat dyes.

Uses

Manufacture of dyes.

Definition

A four-ring system.

General Description

Yellow needles.

Reactivity Profile

Benzanthrone is incompatible with nitrobenzene and potassium hydroxide. Benzanthrone is also incompatible with strong oxidizing agents.

Fire Hazard

Flash point data for Benzanthrone are not available; however, Benzanthrone is probably combustible.

Synthesis

Benzanthrone is prepared commercially by reacting anthraquinone with glycerol, sulfuric acid, and a reducing agent, usually iron. This involves reduction of anthraquinone to anthrone (122), which condenses immediately with the acrolein formed by dehydration of glycerol, and is finally oxidized by the sulfuric acid , , . An improved process is described in , . More recently, the use of phosphorus or a phosphorus compound, e.g., sodium hypophosphite, has been proposed as the reducing agent . Electrochemical procedures have been also suggested , . It is possible to start with anthrone prepared in a separate step, e.g., by hydrogenation . Benzanthrone is best purified by sublimation.

Purification Methods

Crystallise benzanthrone from EtOH or xylene. [Beilstein 7 IV 1819.]