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[Elon] Trademark for methyl p-aminophenol sulfate. Metol is used in developing solutions for black and white photographs.

Synonyms and Related Terms

methyl p-aminophenol sulfate; p-methylaminophenol sulfate; Enol; Genol; Graphol; Photo-Rex; Verol

Chemical structure


Other Properties

Soluble in water and ethanol. Insoluble in ether.

Composition HOC6NHCH3-1/2H2SO4
CAS 55-55-0
Molecular Weight mol. wt. = 344.39

Hazards and Safety

Discolors in air. Combustible. Flash point = 256C (493F)

Moderately toxic by ingestion, inhalation and skin contact.

Mallinckrodt Baker: MSDS

Sources Checked for Data in Record

  • G.G. Hawley, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 6th ed., 1961

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