[ID] 2 [Sculpture Tech] Plaster Mixing & Setting [Ingestion Haz] Potassium sulfate & alum slightly toxic, borax moderately toxic, lime highly toxic [Inhalation Haz] Dust irritating, borax moderately toxic, lime highly toxic [Other Hazards] Acetic acid highly corrosive [Precautions] Wear dust mask; vacuum or mop dust; don't sweep; wear gloves & goggles [Skin Contact Haz] 
Potassium alum slightly toxic, borax slightly toxic, burnt lime moderately toxic