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Hydroquinone (123-31-9)

Identification
Name:Hydroquinone
Synonyms:1,4-Benzenediol; Quinol; Hydroxyquinone; 1,4-Dihydroxybenzene
CAS:123-31-9
EINECS: 204-617-8
Molecular Formula: C6H6O2
Molecular Weight: 110.11
InChI: InChI=1/C6H6O2/c7-5-1-2-6(8)4-3-5/h1-4,7-8H
Molecular Structure: (C6H6O2) 1,4-Benzenediol; Quinol; Hydroxyquinone; 1,4-Dihydroxybenzene
Properties
Transport:UN 2662
Density:1.332
Stability:Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, oxygen, ferric salts. Light and air-sensitive. Discolours in air.
Refractive index:1.689
Solubility:70 g/L (20 oC)
Appearance:off-white powder or white needle-like crystals
Specification:

?Hydroquinone , its CAS NO. is 123-31-9, the synonyms are Quinol ; 1,4-Benzenediol ; 1,4-Dihydroxybenzene .

Report:

IARC Cancer Review: Group 3 IMEMDT ?? IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 , 1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.:?) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT ?? IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 15 , 1977,p. 155.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.:?) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Community Right-To-Know List. EPA Extremely Hazardous Substances List. EPA Genetic Toxicology Program. Reported in EPA TSCA Inventory.

Packinggroup: III
Color: White crystals
Monoclinic prisms (sublimation); needles from water; prisms from methanol
Light-tan, light-gray, or colorless crystals.
Usage:

Use as photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. Depigmentor

Safety Data
Hazard Symbols Xn:Harmful