Altrose

• (2S, 3R, 4R, 5R) - Pentahydroxyhexanal
• (2R, 3S, 4S, 5S) - Pentahydroxyhexanal

• D-( )- altrose: 1990-29-0
• L-( -)- altrose: 1949-88-8
• DL- (±)- altrose: 1949-88-8

White solid

Fixed

106-108 ° C

Template: Infobox chemical / molecular formula search available

Altrose is a monosaccharide with six carbon atoms. This sugar is in a group of non-naturally occurring aldohexoses with the molecular formula C6H12O6.

As with any sugar (except dihydroxyacetone), there are two enantiomeric forms, such as image and mirror image behave.

• 2.1 Fehling's reaction
• 2.2 Tollens reaction ( silver mirror test )

Properties

Chemical Properties

In aqueous solution it is partly to an intramolecular ring closure so that an equilibrium between the aldehyde and the two ring forms ( furanose and pyranose ):

Proof

Fehling's reaction

The proof of the aldehyde in aqueous solution of a mixture of copper (II ) sulphate ( Fehling I) and basic potassium sodium tartrate solution ( Fehling II) is positive, it forms solid copper (I ) oxide ( brick red precipitation) (see Fehling's test ).

Tollens reaction ( silver mirror test )

The Ag in solution of silver nitrate is reduced by the altrose to elemental silver that coats the test vessel with a metal mirror in the ideal case (see Tollensprobe ).