铬酸酐又称三氧化铬，分子式Cro3,相对分子量99.994.暗红色或者紫色斜方结晶，易潮解，溶于水、硫酸、硝酸，强氧化剂。

Chromic anhydride, also known as chromium trioxide, molecular bula Cro3, relative molecular weight 99.994. Dark red or purple rhombic crystal, easy deliquescence, soluble in water, sulfuric acid, nitric acid, strong oxidant

铬酸酐用途：主要用于电镀、医药、印刷、木材防腐等。