METHYLHYDROQUINONE

PRODUCT IDENTIFICATION
CAS NO. 95-71-6

METHYLHYDROQUINONE

EINECS  NO. 202-443-7
FORMULA CH3C6H3(OH)2
MOL WT. 124.14

H.S. CODE

 

TOXICITY

 Oral mouse LD50: >400 mg/kg 
SYNONYMS 2-methyl-1,4-benzenediol; Toluhydroquinone;
2,5-Dihydroxytoluene; 2-Methylhydroquinone; Methyl-p-hydroquinone; 2,5-toluenediol; P-toluquinol; Tolylhydroquinone; 2-Methylhydrochinon (German); 2-Metilhidroquinona (Spanish); 2-Methylhydroquinone (French);
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE white to off-white crystal

MELTING POINT

 125 C
BOILING POINT  
SPECIFIC GRAVITY 1.34

SOLUBILITY IN WATER

 Soluble
pH  
VAPOR DENSITY  

REFRACTIVE INDEX

 

NFPA RATINGS

Health: 1, Flammability: 1, Reactivity: 0

AUTOIGNITION

455 C

FLASH POINT

172 C

STABILITY Stable under ordinary conditions

APPLICATIONS
It is used as a stabilizer for unsaturated polyesters and as an antioxidant for fatty esters, linseed oil, and other nonfood fats and oils.. It is used as a stabilizer to inhibit peroxide formation in ethers, chlorinated hydrocarbons and ethyl cellulose. It is also used as an intermediate to manufacture other stabilizers, dyes, pharmaceuticals and plasticizers.
SALES SPECIFICATION

APPEARANCE

 white to off-white crystal
ASSAY

99.0% min

ASH

0.01% max

TRANSPORTATION
PACKING 25kgs in bag
HAZARD CLASS 6.1 (Packing group: III)
UN NO. 2811
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 22, Safety Phrases:
GENERAL DESCRIPTION OF QUINONE

Quinone is a group of aromatic compounds containing two opposite carbonyl groups (C=O) and the other two pairs of carbon atoms linked by vinylene group(-CH=CH) in a six-membered unsaturated ring. The carbonyl groups are located in different rings and form various chemical structures which offer important roles to colours. Quinones are used in photography and dye manufacture. Quinones occur benzoquinones, naphthoquinones, anthraquinones, and polycyclic quinones. Though quinones are found in plants and in a few animals, they usually are prepared by oxidation of aromatic amines, polyhydric phenols, and polynuclear hydrocarbons.The reduction of quinone to the corresponding dihydroxy form is an important characteristic reaction. In acidic solution, p-benzoquinone is reduced reversibly to hydroquinone. The so-called quinhydrone electrode, containing equimolar solution of quinone and hydroquinone, is used to determine hydrogen ion concentrations depends on the oxidation-reduction reactions. Hydroquinone and its derivatives used principally in photographic dye chemicals, in medicine, as an antioxidant, and in paints, varnishes, and motor fuels and oils. Hydroquinone and certain derivatives are also used as polymerization inhibitors by direct reacting with peroxy-free radical to tie up free radicals.