1-THIOFLAVONE Property

Melting point:

125-127 °C(lit.)

Boiling point:

389.4±42.0 °C(Predicted)

Density 

1.269±0.06 g/cm3(Predicted)

EPA Substance Registry System

4H-1-Benzothiopyran-4-one, 2-phenyl- (784-62-3)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

WGK Germany 

3

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

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

P302+P352IF ON SKIN: wash with plenty of soap and water.

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

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

1-THIOFLAVONE Chemical Properties,Usage,Production

Purification Methods

This yellow solid is purified by passage through a silica gel column, eluting with *C6H6/Me6CO, evaporating and crystallising the residue from EtOH. The sulfoxide [65373-82-2] has m 133-135o, and the sulfone [22810-82-2] has m 136.5-137o (from EtOH). The dimethylhydrazone has m 111-113o (from BuOH). It forms easily hydrolysable salts. [Nakazumi et al. J Heterocycl Chem 21 193 1984, Chen et al. J Org Chem 51 3282 1986, Van Allen & Reynolds J Heterocycl Chem 8 807 1971, Beilstein 17 I 204, 17 III/IV 5420, 17/10 V 560.]