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A colorless crystalline compound used as a photographic developer since 1892. Amidol, or diaminophenol hydrochloride, is also used to dye furs and hair.

Synonyms and Related Terms

acrol; diaminophenol hydrochloride; 2,4-diaminophenol dihydrochloride

Chemical structure


Other Properties

Turns dark brown with age. Produces difficult to remove stains on most materials.

Composition C6H3(NH2)2OH-2HCl
CAS 137-09-7
Melting Point 205
Molecular Weight mol. wt.=197.07

Hazards and Safety

Ingestion is toxic and may result in vertigo, convulsions and coma.

Inhalation and contact cause irritation and may produce an allergic reaction.

Fisher Scientific: MSDS

Sources Checked for Data in Record

  • 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
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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