Several are known or suspected carcinogens such as benzene and toluene. Heavy metals are hazardous both as dusts and as fumes. Lead affects the nerves, digestive system, muscles and joints. Arsenic, cadmium and chromium are known carcinogens. Mercury, copper, cobalt, silver, manganese, selenium and zinc are all acutely toxic.
Acids are corrosive to skin and eyes.
Acid vapors are irritating to the lungs and inhalation of small amounts may damage lung tissue. Concentrated acids can react with many other materials. Return to top of Household Hazardous Materials Basic Safety Rules Know the hazards of the materials you're working with. Use the safest materials and procedures possible. Use good ventilation at all times.