The crystal is octahedral in purple or ruby red equiaxed system, molecular formula is crh24ko20s2 and relative molecular weight is 499.40300.
Potassium chromium sulphate is used as an analytical reagent. It can be used as setting agent of photographic film in fixing solution. It can be used as chrome complexing agent and mordant for printing and dyeing of reactive red brown k-b3r, neutral violet BL, neutral orange RL and neutral peach red BL. It is also used in glass, ceramics and other fields. It is used as crosslinking agent, tanning agent, mordant, photographic fixer, food additive, etc.