Water soluble seeds polysaccharide was extracted from Cassia glauca Lam. seeds on acid hydrolysis with sulphuric acid and obtained hydrolysate on paper chromatographic analysis led to separation of D-galactose and D-mannose in 1:4 molar ratio. Purified seeds polysaccharide was reduced after periodate oxidation with sodium borohydride and sulphuric acid by Smith degradation method. The obtained hydrolysate produced polyalcohols as glycerol, erythritol and traces of D-mannose in 1.00:3.60:0.50 molar ratio by paper chromatography. The derivatives of polyalcohols were produced from seeds polysaccharide as: glycerol-tri-O-p-nitrobenzoate and tetra-O-tosyl-erythritol. The absorbance of polyalcohols were recorded in photoelectrocolorimeter at 540mµ for glycerol and erythritol.