Toxic-dust respirator

Health and Safety Factors. Terephthahc acid has a low order of toxicity. Inhalation by rats for 6 h/d, 5 d/wk for 4 wk produced no fatahties at a dust exposure level of 25 mg/m. The mean acute oral toxicity for rats is over 18 g/kg (86), and for mice over 6 g/kg (87). When terephthahc acid was fed as 3% of the diet to rats, urinary calcuh formed in 90 d, some of which led to cancer. High doses of terephthahc acid lead to formation of calcium terephthalate at levels exceeding its solubihty in urine. This insoluble material leads to the calcuh and provides a threshold below which cancer is not observed (88). Normal precautions used in handling industrial chemicals should be observed with terephthahc acid. If ventilation is inadequate, a toxic-dust respirator should be used to avoid prolonged exposure. 

Glazes should be prepared where adequate ventilation is available. If glazes are routinely prepared from powders, a face mask should be used. Another option, if available, is to use a plain-opening exhaust hood or wear a toxic-dust respirator approved by the National Institute for Occupational Safety and Health. Also, gloves should be worn during the preparation and application because glaze substances can be irritating to the skin. 

Calcium Peroxide Toxic dust respirator general-purpose gloves chemical safety goggles full cover clothing. Remove to fresh air. Flush with water. Flush with water for 15 minutes. And consult physician. 

Observe normal precautions appropriate to the circumstances and quantity of material handled. Bronopol may be harmful upon inhalation and the solid or concentrated solutions can be irritant to the skin and eyes. Eye protection, gloves, and dust respirator are recommended. Bronopol burns to produce toxic fumes. 

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