[Rationale for maximum allowable exposure level of aluminum sulfate and its coagulants in the air of the workplace].

Aluminum sulfate, potash alum, ammonium alum, purified and unpurified nephelinic coagulant are assigned to the 3rd jeopardy class (moderately dangerous chemicals), sodium alum--to the 4th jeopardy class (slightly dangerous chemicals) at the single exposure. Local irritation of rabbit's skin was not revealed, but instillation into the eye results in conjunctivitis and purulent ophthalmitis. Aluminum sulfate and coagulants afflict the nervous system, liver and heart. The recommended MAC in the air of workplace for aluminum sulfate, potash alum, sodium alum and coagulants based on them is equal to 0.5 mg/m3.