1,2,3,5-TETRAMETHYLBENZENE Property

Melting point:

-24°

Boiling point:

198°C

Density 

0,89 g/cm³

refractive index 

n20/D 1.512(lit.)

Flash point:

63°C

Water Solubility 

Insoluble in water

form 

clear liquid

color 

Colorless to Light yellow to Light orange

Merck 

14,5166

LogP

4.100

CAS DataBase Reference

527-53-7(CAS DataBase Reference)

EPA Substance Registry System

1,2,3,5-Tetramethylbenzene (527-53-7)

Safety

Hazard Codes 

Xi

Risk Statements 

20/21/22-36/37/38-36

Safety Statements 

26-36/37/39-24/25-23-45

RIDADR 

3082

RTECS 

DC0475000

HS Code 

2902.90.3050

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

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

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

1,2,3,5-TETRAMETHYLBENZENE Chemical Properties,Usage,Production

Chemical Properties

clear colourless to pale yellow liquid

Uses

Organic synthesis.

Synthesis Reference(s)

Journal of the American Chemical Society, 79, p. 6277, 1957 DOI: 10.1021/ja01580a044
Organic Syntheses, Coll. Vol. 2, p. 360, 1943

General Description

A pale yellow to white liquid with a camphor-like odor. Flash point 165°F. Less dense than water and only negligibly soluble in water. Slightly irritates the skin and eyes. Slightly toxic by ingestion but may irritate the mouth, throat and gastrointestinal tract.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as 1,2,3,5-TETRAMETHYLBENZENE, and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.

Hazard

Liquid. Soluble in alcohol and ether; insoluble in water. Combustible.

Health Hazard

CALL FOR MEDICAL AID. LIQUID: Irritating to skin, eyes, and respiratory tract. Remove contaminated clothing and shoes. Flush affected areas with plenty of water. IF IN EYES, hold eyelids open and flush with plenty of water. VAPORS: Irritating to skin, eyes and respiratory tract. Move to fresh air. If breathing has stopped, give artificial respiration. If breathing is difficult, give oxygen. IF IN EYES, hold eyelids open and flush with plenty of water. Harmful if inhaled or swallowed. Vapor or mist is irritating to the eyes, mucous membranes, and upper respiratory tract. Prolonged contact can cause dermititis, and prolonged exposure can cause nausea, dizziness and headache.

Fire Hazard

Combustible.

Purification Methods

Reflux isodurene over sodium and distil it under reduced pressure. [Smith Org Synth Coll Vol II 248 1943, Beilstein 5 H 430, 5 II 329, 5 III 976, 5 IV 1073.]