Miscellaneous Applications

Cerium sulfide pigments are also used for some applications in printing inks and polyurethane foams, and are being evaluated in laminated paper.

4.5

Toxicology and Environmental Aspects

Cerium sulfide pigments (NEOLOR™) are almost completely insoluble in water, and the cerium ion shows effectively no toxicity (acute or chronic). As predicted, cerium sulfide pigments have shown no risk to humans or the environment. Acute oral toxicity: LD50 rat, oral >5000 mg/kg [28]. Tests for irritation to the skin, eyes, or mucous membranes have also shown no adverse effects, as have tests for potential skin sensitivity [29].

Cerium sulfide pigments also show no genotoxic or carcinogenicity effects. Bac­terial and in vitro gene mutation assays (OECD 471 & 476) fail to show mutagenic activity. In vitro chromosomal aberration tests (OECD 473) show no clastogenic activity. Additionally, sub-chronic toxicity (28 day, OECD 407) studies show no sig­nificant adverse effects (dose of 150 mg/kg/day), unlike cadmium and some other pigments [30].

Cerium sulfide pigments show no harmful effects on the environment. The pig­ments are virtually completely insoluble. They show no mobility and readily form deposits in the soil. Further studies show they are not harmful to the aquatic envi­ronment: EC 50 (Daphnia magna, 48 h): >100 mg/L) [31].

4.6

Комментирование и размещение ссылок запрещено.

Комментарии закрыты.