Chromium trioxide photograph

Chromium Trioxide

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FormulaCrO3
Molar mass99. 99 g/mol
Melting point197 °C (387 °F; 470 K)
Solubility in water164. 8 g/100 mL (0 °C); 169 g/100 mL (25 °C); 172. 6 g/100 mL (40 °C); 198. 1 g/100 mL (100 °C)
Boiling point250 °C (482 °F; 523 K); decomposes
UN number1463
Date of Reg.
Date of Upd.
ID644720
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About Chromium Trioxide


Chromium trioxide is an inorganic compound with the formula CrO₃. It is the acidic anhydride of chromic acid, and is sometimes marketed under the same name. This compound is a dark-purple solid under anhydrous conditions, bright orange when wet and which dissolves in water concomitant with hydrolysis.

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