Chromium(III) oxide (CrO₈), also known as chromium trioxide or chromium anhydride, is a reddish-brown crystalline substance. It has a melting point of 197°C and is highly hygroscopic. Due to its strong oxidizing properties, it is highly corrosive and extremely toxic, capable of corroding skin. When dissolved in water, chromium anhydride forms chromic acid (H₂CrO₄) or dichromic acid (H₂Cr₂O₇).
10. What is chromium anhydride and chromic acid?
Nov 03, 2025
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