| 1. | Characters and features : red powders , fine particle , in good dispersancy , good impenetrability to ultraviolet ray , stable in atmosphere and sunlight , good light resistance , good thermal endurance , good alkali resistance , dissolved only in hot strong acid
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。 |
