Hydroxylamine sulfate

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Colorless crystals used as a Reducing agent in the photographic processing. Hydroxylamine sulfate is also used for chemical synthesis, for rustproofing, and to dehair hides.

Synonyms and Related Terms

HS; hydroxylammonium sulfate; oxammonium sulfate


  • Skin contact is irritating and corrosive.
  • Hygroscopic.
  • May cause methemoglobinemia.
  • Inhalation and ingestion cause illness and possible death. Suspected teratogen.
  • Fisher Scientific: MSDS

Physical and Chemical Properties

Soluble in water. Slightly soluble in ethanol.

Composition (NH2OH)2-H2SO4
CAS 10039-54-0
Melting Point 177 C (dec)
Density 1.9 g/ml
Molecular Weight mol. wt. = 164.14

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 4874
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

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