Calcium Carbonate Calcium carbonate 10 mg/m3 Not Available Not Available (a) This value is for inhalable dust containing no asbestos and < 1% crystalline silica. EMERGENCY LIMITS Ingredient Material name TEEL1 TEEL2 TEEL3 Calcium Carbonate Carbonic acid, calcium salt 45 mg/m3 210 mg/m3 1,300 mg/m3 Ingredient Original IDLH Revised IDLH