Article · Wikipedia archive · Last revised Jun 14, 2026

Allose

Allose is an aldohexose sugar. It is a rare monosaccharide that occurs as a 6-O-cinnamyl glycoside in the leaves of the African shrub Protea rubropilosa. Extracts from the fresh-water alga Ochromas malhamensis contain this sugar but of unknown absolute configuration. It is soluble in water and practically insoluble in methanol.

Last revised
Jun 14, 2026
Read time
≈ 1 min
Length
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Citations
4
Source
Wikipedia ↗
Allose1
Stereo structural formula of (6R)-allopyranose
Stereo structural formula of (6R)-allopyranose source ↗
Ball-and-stick model of Alpha-allose (D, L)
Ball-and-stick model of Alpha-allose (D, L) source ↗
Names
IUPAC name
allo-Hexose2
Preferred IUPAC name
Allose
Systematic IUPAC name
(2R,3R,4R,5R)-2,3,4,5,6-Pentahydroxyhexanal
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
UNII
  • InChI=1S/C6H12O6/c7-1-3(9)5(11)6(12)4(10)2-8/h1,3-6,8-12H,2H2/t3-,4?,5-,6+/m0/s1 ☒N
    Key: GZCGUPFRVQAUEE-OBOOZECYSA-N ☒N
  • OCC(O)[C@@H](O)[C@@H](O)[C@@H](O)C=O
Properties
C6H12O6
Molar mass 180.156 g·mol−1
Melting point 128 °C (262 °F; 401 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Allose is an aldohexose sugar. It is a rare monosaccharide that occurs as a 6-O-cinnamyl glycoside in the leaves of the African shrub Protea rubropilosa. Extracts from the fresh-water alga Ochromas malhamensis contain this sugar but of unknown absolute configuration. It is soluble in water and practically insoluble in methanol.

Reduction of allose by catalytic hydrogenation produces an obscure sugar alcohol allitol which is rarely used in the chemical industry.34

Allose is a C-3 epimer of glucose.

Notes

Notes

  1. The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (11th ed.). Merck. 1989. ISBN 091191028X.
  2. "Appendix".
  3. Reusch, William (May 5, 2013). "Carbohydrates". chemistry.msu.edu. East Lansing, Michigan: Michigan State University. Retrieved January 21, 2025.
  4. National Center for Biotechnology Information (2025). PubChem Compound Summary for CID 120700, Allitol. Retrieved January 21, 2025 from Allitol.
References

References