| 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: |  |
| 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
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