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A sweet-tasting, crystalline powder. Mannitol occurs naturally in plants and seaweeds. Mannitol will liquefy any gum solution that has been gelled with borate because it reacts with borates to form mannitoborate. Examples of gums that gel with borate are Gum arabic, Locust bean gum, and gum guar. Mannitol has been used in conjunction with Sucrose for the impregnation of waterlogged wood (Morgos and Imazu, 1993).



Chemical structure


Synonyms and Related Terms

manna sugar; mannite; cordycepic acid


  • Combustible.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water, pyridine, aniline and dilute alkalis. Slightly soluble in alcohols and amines. Insoluble in other organic solvents.

Composition C8H8(OH)6
CAS 69-65-8
Melting Point 166-168 C
Density 1.52 g/ml
Molecular Weight mol. wt. = 182.17
Boiling Point 290-295

Resources and Citations

  • A Morgos, S.Imazu "A Conservation Method for Waterlogged Wood using a Sucrose-Mannitol Mixture" ICOM Preprints, Washington DC, 1993, p.266-272.
  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 5788
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993