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Material Safety Data Sheet <br /> Material Name : LIMESTONE ID : C =MS -AT - <br /> 2003ADMWLS <br /> B : Component Exposure Limits <br /> Calcium carbonate ( 1317-65-3) <br /> OSHA: 15 mg/m3 TWA (total dust) ; 5 mg/m3 TWA (respirable fraction) <br /> NIOSH : 10 mg/m3 TWA (total dust) ; 5 mg/m3 TWA ( respirable dust) <br /> Quartz ( 14808 -60 -7 ) <br /> ACGIH : 0. 025 mg/m3 TWA (respirable fraction ) <br /> OSHA: 0 . 1 mg/m3 TWA (respirable dust) <br /> NIOSH : 0. 05 mg/m3 TWA (respirable dust) <br /> Engineering Controls <br /> Provide adequate local exhaust ventilation to maintain worker exposure below exposure limits . <br /> PERSONAL PROTECTIVE EQUIPMENT <br /> Personal Protective Equipment: Eyes/ Face <br /> Wear dust goggles . <br /> Personal Protective Equipment: Skin <br /> Use impervious gloves . <br /> Personal Protective Equipment : Respiratory <br /> Use a dust mask for particulate concentrations exceeding the Occupational Exposure Limit. <br /> Personal Protective Equipment: General <br /> Eye wash fountain and emergency showers are recommended . <br /> * * * Section 9 - Physical & Chemical Properties <br /> Appearance : White Powder Odor: None <br /> Physical State : Solid pH : N/A <br /> Vapor Pressure : N/A Vapor Density : N/A <br /> Boiling Point: N/A Melting Point: Unknown <br /> Solubility (H2O) : Partially soluble Specific Gravity : 2 . 71 <br /> * * * Section 10 - Stability & Reactivity <br /> Chemical Stability <br /> Stable under normal conditions . <br /> Chemical Stability : Conditions to Avoid <br /> Avoid contact with acids . <br /> Incompatibility <br /> Calcium Carbonate ignites on contact with fluorine . It is incompatible with acids , alum , ammonium salts , and <br /> mercury/hydrogen mixtures . <br /> Hazardous Decomposition <br /> Thermal oxidative decomposition of calcium carbonate can produce calcium oxide . <br /> Hazardous Polymerization <br /> Will not occur. <br /> * * * Section 11 - Toxicological Information <br /> Acute and Chronic Toxicity <br /> A : General Product Information <br /> Overexposure to calcium carbonate may result in irritation to eyes , skin and respiratory system . Acute ingestion <br /> may result in mild gastrointestinal distress while chronic exposure may result in hypercalcemia , alkalosis and <br /> renal impairment . Approximately 70-80% of inhaled calcium carbonate was retained in the lungs . Animal studies <br /> suggest that inhalation of calcium carbonate dusts may enhance susceptibility to respiratory infection . <br /> Page 3 of 6 Issue Date : 09/11 / 12 Revision : 1 . 0101 Print Date : 9/11 /2012 <br /> Prepared by the MTI Environmental Health and Safety Services Department <br />