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Title: Altrose  
Author: World Heritage Encyclopedia
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Subject: Le Bel-van't Hoff rule, Monosaccharides, Octose, Turanose, Mannoheptulose
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Stereo structural formula of (5R)-altrose
Stereo structural formula of (6R)-altropyranose
CAS number  (D) N,  (L) YesY
ChemSpider  YesY
Jmol-3D images Image 1
Image 2
Molecular formula C6H12O6
Molar mass 180.16 g mol−1
Melting point 103 to 105 °C (217 to 221 °F; 376 to 378 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N   YesY/N?)

Altrose is an aldohexose sugar. D-Altrose is an unnatural monosaccharide. It is soluble in water and practically insoluble in methanol. However, L-altrose has been isolated from strains of the bacterium Butyrivibrio fibrisolvens.[1]

Altrose is a C-3 epimer of mannose. The ring conformation of α-Altropyranoside is flexible compared to most other aldohexopyranosides, with idose as exception. In solution different derivatives of altrose have been shown to occupy both 4C1, OS2 and 1C4-conformations.

Haworth projections of various forms of D-altrose


  1. ^ US patent 4966845, Stack; Robert J., "Microbial production of L-altrose", issued 1990-10-30, assigned to Government of the United States of America, Secretary of Agriculture 
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