SBId-1

SECTION 2: Hazards identification

White to tan rock with no odor. EMERGENCY OVERVIEW This product is a naturally occurring mineral which contains crystalline silica in the form of quartz. Prolonged or repeated inhalation of crystalline silica over an extended period of time may result in lung damage and may cause lung cancer. The risk of cancer is dependent on the duration and level of exposure.

Potential health effects

Eye: Contact may cause mechanical irritation with redness, tearing and pain. Skin: May cause drying of the skin Inhalation: Inhalation of high concentrations of dust may cause mucous membrane and respiratory irritation. Ingestion: Swallowing large amounts may cause gastrointestinal irritation. Chronic Hazards: Prolonged overexposure to dust may cause lung damage. This product contains a small amount of crystalline silica. This product contains crystalline silica. Repeated inhalation of silica dust over an extended period of time may result in a progressive, disabling, potentially fatal lung disease, silicosis. Symptoms include shortness of breath, chest pain and reduced lung function. Prolonged exposure to respirable crystalline silica is also associated with chronic bronchitis, emphysema, autoimmune disorders including scleroderma and rheumatoid arthritis and kidney disease. Exposure to respirable crystalline silica increases the risk of tuberculosis. Carcinogen Status: The International Agency for Research on Cancer has determined that respirable crystalline silica is a known human carcinogen (Group 1). The National Toxicology Program classifies respirable crystalline silica as a known human carcinogen.

Medical Conditions Generally Aggravated by Exposure

Persons with pre-existing respiratory disorders may be at an increased risk from exposure.