1,2-bis(4-hydroxyphenyl)ethan-1-one Property

Melting point:

215–219°C

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

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.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

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.

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

P337+P313IF eye irritation persists: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

1,2-bis(4-hydroxyphenyl)ethan-1-one Chemical Properties,Usage,Production

Preparation

Preparation by total demethylation of 4-methoxyphenyl 4-methoxybenzyl ketone (4,4′-dimethoxydeoxybenzoin),
? with refluxing pyridinium chloride (4 equiv) for 1 h (80–85%);
? with boiling a mixture of 50% aqueous hydriodic acid and phenol for 30 min (94%);
? with hydriodic acid (d = 1.7) in acetic acid at 135–140° for 10 min (quantitative yield);
? with aluminium chloride in refluxing benzene for 1.5 h (25%).