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Hydrated Lime <br /> Magnesium Oxide 1309-48-4 OSHA PEL: 15mg/m3 <br /> ACGIH TLV: 10mg/m3 <br /> Crystalline Silica 14808-60-7 OSHA PEL: 10mg/m3 divided by(the percentage of silica in the <br /> dust plus 2) (respirable) <br /> ACGIH TLV: 0.025 mg/m3 <br /> Engineering controls : Provide ventilation adequate to maintain PELs. <br /> Individual Protection Measures <br /> Respiratory Protection :Use NIOSH/MSHA approved respirators if airborne concentration exceeds PEL. <br /> Skin Protection :Use appropriate gloves to prevent skin contact. When there is a risk of skin contact, wear <br /> suitable clothing to prevent such contact. <br /> Eye Protection : Use safety glasses with side shields or safety goggles. Contact lenses should not be worn when <br /> working with lime products. <br /> Other : Eye wash fountain and emergency showers are recommended <br /> Canada <br /> Occupational exposure limits TWA(8 hours) STEL(15 min) Ceiling <br /> Ingredient List name ppm mg/m3 Other ppm mg/m3 Other ppm mg/m3 Other Notations <br /> Calcium dihydroxide US ACGIH 4/2014 - 5 - - - - - - - <br /> AB 4/2009 - 5 - - - - - - - [3] <br /> BC 7/2013 - 5 - - - - - - - <br /> ON 1/2013 - 5 - - - - - - - <br /> QC 1/2014 - 5 - - - - - - - <br /> Crystalline silica, quartz US ACGIH 4/2014- 0.025 - - - - - - - [a] <br /> AB 4/2009 - 0.025 - - - - - - - [b] <br /> BC 7/2013 - 0.025 - - - - - - - [c] <br /> ON 1/2013 - 0.1 - - - - - - - [a] <br /> QC 1/2014 - 0.1 - - - - - - - [d] <br /> [3]Skin sensitization <br /> Form: [a]Respirable fraction [b]Respirable particulate. [c]Respirable [d]Respirable dust <br /> Section 9. Physical and chemical properties <br /> Physical State : Solid <br /> Appearance : White or grayish-white material <br /> Odor : Sweet, soil like <br /> Odor threshold : Not applicable <br /> pH at 25 degrees C : 12.45Melting point : 1076°F, 580°C <br /> Initial boiling point : 5162°F, 2850°C <br /> Flash point : Not applicable <br /> Evaporation rate : No information available <br /> Flammability(solid,gas) : Not applicable. <br /> Lower and upper explosive : Not applicable. <br /> 4/8 <br />