Hydroquinone
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Description
A white crystalline compound. Hydroquinone is used in black and white photographic processing as a Reducing agent. It is also used as an Antioxidant in polymers and as a Stabilizer in paints and varnishes.
Synonyms and Related Terms
1,4-benzenediol; p-dihydroxybenzene; hydroquinol; quinol; Aida; Black and White Bleaching Cream; Eldoquin; Eldopaque; Tecquinol; Quinol; hydrochinon; hydrokinone; 1,4-dihydroxybenzene;
Risks
- Combustible. Flash point =165 C (329 F).
- Highly toxic by ingestion and inhalation.
- Skin contact can cause severe irritation.
- Echemi: SDS
Physical and Chemical Properties
Soluble in water, ethanol and ether. Slightly soluble in benzene.
| Composition | C6H4(OH)2 |
|---|---|
| CAS | 123-31-9 |
| Melting Point | 170-171 C |
| Density | 1.332 g/ml |
| Molecular Weight | mol. wt.=110.11 |
| Boiling Point | 285-287 C |
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 4796
- Photographic chemicals: www.jetcity.com/~mrjones/chemdesc.htm -
- Wikipedia: http://en.wikipedia.org/wiki/Hydroquinone (Accessed Mar. 20, 2006)
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998