from Wikipedia, the free encyclopedia
Structural formula
D- and L-xylulose in Fischer projection
Fischer projection , open-chain representation
Surname Xylulose
other names
  • 1,3,4,5-tetrahydroxypentan-2-one
  • threo pentulose
  • threo -2-pentulose
Molecular formula C 5 H 10 O 5
Brief description

pale yellow syrupy liquid

External identifiers / databases
CAS number 527-50-4 ( L- shape)

551-84-8 ( D- shape)

PubChem 22253
Wikidata Q423204
Molar mass 150.13 g mol −1
Physical state


safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Xylulose is a ketopentose, i.e. a monosaccharide with five carbon atoms (hence pentose ) and a keto group on the C 2 atom (hence ketose ).

The molecule occurs in the form of xylulose-5-phosphate as an intermediate in the pentose phosphate pathway and as a signaling molecule.

D -Xylulose - spellings
Wedge formula Haworth notation
Wedge formula Haworth notation Alpha
α- D -xylulofuranose
Haworth notation Beta
β- D -xylulofuranose

Xylulose gives a positive Fehling test . It can be represented by reacting xylose with pyridine in the heat. Xylulose forms an osazone which melts at 160–163 ° C. The L -form can be detected in the urine in pentosuria . The biosynthesis probably proceeds from D- glucuronic acid .

Individual evidence

  1. a b c Xylulose data sheet from Sigma-Aldrich , accessed on April 15, 2011 ( PDF ).Template: Sigma-Aldrich / name not given
  2. a b c d e entry on d-xylulose. In: Römpp Online . Georg Thieme Verlag, accessed on December 25, 2014.

Web links

Commons : Xylulose  - Collection of pictures, videos and audio files