Reagent Xylene Methyl tertiary-butyl ether
Hazardous substance symbol harmful (Xn) irritant (Xi)
Maximum permissible concentration 100 mg/m3 300 mg/m3
Maximum permissible momentary concentration 350 mg/m3 not established
Topical exposure in rabbits intense irritation both eyes and skin slight irritation of the eyes and no irritation of the skin
Inhalatory systemic exposure in rats (lethal concentration,50%) 5 g/m3 23.57 g/m3
Table 1: Safety characteristics of the used paraffin solvents: xylene and methyl tertiary-butyl ether.