Toxicological investigations in the semiconductor industry: III: Studies on prenatal toxicity caused by waste products from aluminum plasma etching processes.

The prenatal toxic effects of contaminated vacuum pump oil (Sample A) and solid waste products (Samples B and C) originating from aluminum plasma etching processes in semiconductor manufacturing were investigated. Three strains of pregnant mice with different degrees of sensitivity during organogenesis (days 6-15 of gestation) were treated daily with 1000 mglkg b.w.

Investigations of the acute toxic, cytogenetic, and embryotoxic activity of buminafos.

The organophosphorus herbicide buminafos (O,O-dibutyl-(1-butylaminocyclohexyl)-phosphonate) was tested for its acute toxic, cytogenetic, and embryotoxic activity on different strains of mice. The oral LD50 value for male NMRI mice was determined to be 3500 mg/kg. Single oral doses of 175, 1000, and 2000 mg/kg did not cause any significant enhancement in the percentage of chromosome aberrations in bone marrow cells of male NMRI mice.

Investigations on the acute toxic, cytogenetic, and embryotoxic activity of phenyl isocyanate and diethoxyphosphoryl isocyanate.

Phenyl isocyanate (I) and diethoxyphosphoryl isocyanate (II), used as intermediates in organic chemical syntheses, were tested for their acute toxic, cytogenetic, and embryotoxic activity on mice of different strains. The oral LD50 values for male CFLP mice were determined to be 196 mg/kg for I and 4080 mg/kg for II. Single oral doses of 1/40 and 1/20, respectively, of the LD50 of I (4.

Cytogenetic, genetic, and embryotoxicity studies with dimethyl 2,2,2-trichloro-1-(2,2,2-trichloro-1-hydroxyethoxy)-ethylphosphonat e, a hypothetical impurity in technical grade trichlorfon.

The hemiacetal (CH3O)2P(O)CHOCHOHCCl3)CCl3, a hypothetical contaminant in technical preparations of the organophosphorus pesticide trichlorfon, was tested for cytogenetic, mutagenic, and embryotoxic activity after ip administration to mice of different strains. A single dose of 81 mg/kg (0.2 mmol/kg) caused a significant enhancement in the percentage of chromosome aberrations in bone marrow cells of CFLP mice; a similar effect was induced by an equimolar single dose of chemically pure trichlorfon (51.

Cytogenetic and embryotoxic effects of bromophos and demethylbromophos.

The organophosphorus pesticide bromophos and the tetramethylammonium and sodium salts of demethylbromophos were tested for cytogenetic and embryotoxic activity on mice of different strains. Single intraperitoneal (ip) doses of 183.0 mg/kg (0.