Specific Optical Rotations [a]20D of Monosaccharides (in degrees)
Sugar a-Form Equilibrium mixture ß-Form
D-Ribose  -23.1 -23.7 -----
L-Arabinose +54.0 +104.5 +175.0
D-Xylose +92.0 +19.0 -20.0*
D-Glucose +113.4 +52.2 +19.0
D-Galactose +144.0 +80.5 +52.0
D-Fructose -21.0* -92.0 -133.5
D-Mannose +34.0 +14.6 -17.0
L-Rhamnose -7.7 +8.9 +54.0*
*Calculated value