Chromium(iii) hydroxide is an inorganic compound with the chemical formula Cr(oh)3. It is used as a pigment, as a mordant, and as a catalyst for organic Reactions. It is manufactured by adding a solution of ammonium hydroxide to a solution Of chromium salt. [synonyms] Chromium(iii) hydroxide, chromium trihydroxide, chromium(3+) trihydroxide, Chromic hydroxide Properties Chemical formulacr(oh)3 Molar mass103.02 g/mol Appearancegreen, gelatinous precipitate Density3.11 g/cm3 Solubility in watersoluble