Chromium trioxide extra pure

Chromium trioxide, also known as chromic anhydride or chromium(VI) oxide, is an inorganic compound with the formula CrO₃. It appears as dark-red or purple odorless flakes, powder, or crystals, with a molecular weight of 99.99 g/mol and density of 2.7 g/cm³. The solid structure consists of chains of tetrahedrally coordinated chromium atoms sharing vertices, with each Cr(VI) center bonded to three oxygen atoms.​

It has a melting point of 197°C and decomposes above 250°C into Cr₂O₃ and oxygen. Chromium trioxide is sparingly soluble in water (hydrolyzing to chromic acid, H₂CrO₄), soluble in acids and acetone, and acts as a powerful oxidizer, reacting violently with organic materials. 'Extra pure' grade indicates high purity for laboratory use, minimizing impurities for precise applications.​

Widely used in chrome electroplating, organic synthesis as an oxidant, and pigment production, it is highly toxic, mutagenic, and carcinogenic, requiring strict handling precautions. It is produced industrially by acidifying sodium chromate.​