Uranyl nitrate

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Description

A yellow powder with rhombic crystals. Uranyl nitrate is used as an intensifier for black and white photographs. It is also used as a yellow pigment in ceramic glazes.

Synonyms and Related Terms

uranium nitrate (incorrect); uranium oxynitrate, UNH; yellow salt

Risks

  • Toxic by ingestion, inhalation and skin absorption.
  • Causes liver and kidney damage.
  • Skin contact causes irritation and burns.
  • Strongly oxidizing.
  • Fire and explosion risk with percussion.
  • USDE: SDS

Physical and Chemical Properties

  • Soluble in water, ethanol, acetone, ether. Insoluble in benzene, toluene, chloroform.
  • Crystals are triboluminescent when rubbed or crushed.
  • May also occur as hexahydrate (mw=502.13)
Composition UO2(NO3)2
CAS 10102-06-4 (anhydrous)
Melting Point 60.2 C
Density 2.807 g/ml
Molecular Weight mol. wt. = 394.04
Boiling Point 118 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 10000
  • Photographic chemicals: www.jetcity.com~mrjones/chemdesc.htm

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