Talose

Structural formula
	Fischer projection , open-chain representation
General
Surname	D - (+) - talose; L - (-) - talose;
other names	(2 S , 3 S , 4 S , 5 R ) -pentahydroxyhexanal; (2 R , 3 R , 4 R , 5 S ) -pentahydroxyhexanal;
Molecular formula	C 6 H 12 O 6
Brief description	White dust
External identifiers / databases
EC number	219-996-5
ECHA InfoCard	100.018.179
PubChem	99459
ChemSpider	89855
Wikidata	Q423195
properties
Molar mass	180.16 g mol −1
Physical state	firmly
Melting point	133-135 ° C ( D- form)
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	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 .

Talose is a monosaccharide with six carbon atoms. This sugar belongs to the group of aldohexoses . Talose is the C-2 epimer of galactose (see: family tree of aldoses ). D- Talose occurs naturally - albeit in small quantities - as a component of the antibiotic hygromycins (formed by streptomycetes ).

As with any sugar (except for dihydroxyacetone) there are two enantiomeric forms that behave like an image and a mirror image. Whenever “Talose” is mentioned in this text or in the scientific literature without any additional name ( prefix ), D -Talose is meant.

properties

In aqueous solution, an intramolecular ring closure sometimes occurs, so that an equilibrium is established between the aldehyde form and the two ring forms ( furanose and pyranose ):

D -Talose - spellings
Wedge formula	Haworth notation
	α- D- talofuranose 20%	β- D- talofuranose 11%
	α- D -alopyranose 40%	β- D -alopyranose 29%

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet D-Talose at AlfaAesar, accessed on May 22, 2017 ( PDF )(JavaScript required) .
↑ Jürg Hunziker: Carbohydrate Chemistry ( Memento from May 10, 2008 in the Internet Archive ), April 1, 2007.

Web links

Commons : Talose - collection of images, videos and audio files

[Alfa-1] ↑ ^a ^b ^c ^d ^e data sheet D-Talose at AlfaAesar, accessed on May 22, 2017 ( PDF )(JavaScript required) .

[UNI-Bern-2] Jürg Hunziker: Carbohydrate Chemistry ( Memento from May 10, 2008 in the Internet Archive ), April 1, 2007.