4-(phenylazo)-o-cresol Property

EPA Substance Registry System

Phenol, 2-methyl-4-(phenylazo)- (621-66-9)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H318Causes serious eye damage

H335May cause respiratory irritation

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

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

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

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.

P310Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P330Rinse mouth.

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

P362Take off contaminated clothing and wash before reuse.

P501Dispose of contents/container to..…

4-(phenylazo)-o-cresol Chemical Properties,Usage,Production

Preparation

aniline diazotization, and o-Cresol coupling.

Properties and Applications

green light yellow to red yellow. Soluble in hot water for red light yellow, soluble in ethanol for green yellow. In ethanol from out of the crystallization product melting point is 126 ~ 128 ℃. In concentrated sulfuric acid for yellow brown, dilution after brick red solution; In hot concentrated hydrochloric acid in orange brown precipitation; In the heat of 2% sodium hydroxide solution for yellow orange. Used for oil, paraffin wax, cellulose paint color.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	General	126～128	70≥170 Sublimation	Well	Well	Well

Purification Methods

Crystallise the phenol from hexane or pet ether (m 130o). [Beilstein 16 II 59, 16 III 104, 16 IV 193.]