Physicochemical properties of monascorubrin

The physicochemical properties of monascorubin were investigated in order to discuss the application feasibility of monascorubrin in textile dyeing and printing industry.The solubility,acid and alkali resistance,thermal stability and light stability of monascorubin were researched.The effect of mordants on monascorubin was also investigated.The results showed that monascorubin could be dissolved in water.It was relatively stable under 100 ℃.In the range of pH 3~11,it was stable for pH values.Monascorubin maintained stable in the ultraviolet radiation,but sensitive to the visible light.Ferrous sulfate had little effect on monascorubin,while potassium dichromate and copper sulfate had disadvantageous effect on the coloring matter.Praseodymium chloride had protective effect on monascorubin color,thus improving its color fastness.