[Toxicological characteristic of indole as a basis for its hygienic regulation].

The toxic properties of indole have been studied in terms of LD50 indole was established to refer to moderately hazardous substances: in case of indole introducing into the stomach in rats and mice, DL50 is 1200 mg/kg and 750 mg/kg respectively Indole has a weak ability to cumulation, and has a strong irritant effect to the eyes and a moderate one to the skin. Indole has indiscriminate irritating effect on the respiratory tract: Limir is at Limac (77,8 mg/m3). The occupational exposure of indole in the working area is 1 mg/m3.