Characters and features: red powders, fine particle, in good dispersancy, good impenetrability to ultraviolet ray, stabl性状特点:为红色粉末,粉粒细腻,分散性良好,对紫外线有良好的不穿透性,在大气和日光中较稳定其耐光、耐热和耐碱性良好,仅溶于热的强酸中。