Ammonium bicarbonate

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Shiny, hard, white, prism-shaped crystal. Ammonium bicarbonate is used in baking powder and fire-extinguishers. It is also used for degreasing textiles, for chrome leather tanning and as an additive in ceramics. Hartshorn, or Ammonium carbonate, is a double salt of Ammonium carbamate and ammonium bicarbonate.

Synonyms and Related Terms

ammonium acid carbonate; ammonium hydrogen carbonate; hartshorn; powdered baking ammonia; hjortetakssalt (Dan.); Ammoniumhydrogencarbonat (Deut.); ABC-Trieb (Deut.); bicarbonate d'ammonium (Fr.);


  • Contact and inhalation may cause irritation
  • Fisher Scientific: SDS

Physical and Chemical Properties

Soluble in water. pH = 7.8 Insoluble in ethanol.

Composition NH4HCO3
CAS 1066-33-7
Melting Point 36-60 C (dec)
Density 1.586 g/ml
Molecular Weight mol. wt. = 79.06

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 57
  • 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 522
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998