化合物详情

Domestic resources are adequate but are unevenly distributed. There are no gypsum deposits on the eastern seaboard of the United States. Large deposits occur in the Great Lakes region, mid-continent region, California, and other States. /Gypsum/

WORKERS EMPLOYED IN PROCESSING OF GYPSUM ROCK MAY BE EXPOSED TO HIGH ATMOSPHERIC CONCN OF GYPSUM DUST ... FURNACE GASES & SMOKE. IN GYPSUM CALCINATING, WORKERS ARE EXPOSED TO HIGH ENVIRONMENTAL TEMP, & THERE IS ALSO THE HAZARD OF BURNS. /GYPSUM/

irritation eyes, skin, upper respiratory system; conjunctivitis; rhinitis, epistaxis (nosebleed)

Eyes, skin, respiratory system

inhalation, skin and/or eye contact

... Calcium sulfate caused no lung disease in calcium sulfate miners.

The genotoxicity of selenite was investigated in two diploid yeast strains Saccharomyces cerevisiae BZ34 and D7. The effect of reduced glutathione (GSH) on the genotoxicity of selenite in the BZ34 strain was also examined. Selenite induced gene conversion and toxicity in the BZ34 strain. A variety of genetic events occurred including back mutation gene conversion mitotic crossing over aberrant colony formation and toxicity in another strain D7. The genetic activity of selenite peaked at one hour and subsequently declined when the two higher concentrations, (1O(-3) and 10(-2) molar), of selenite were used. When treatment was continued beyond 1 hr the percent of survival decreased marginally. Yeast cells may cause metabolic deactivation of selenite during 5 hr of treatment as the genetic...