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Respiratory protection If engineering controls do not maintain airborne concentrations below recommended exposure <br />limits (where applicable) or to an acceptable level (in countries where exposure limits have not <br />been established), an approved respirator must be worn. In case of inadequate ventilation or risk <br />of inhalation of mist, use suitable respiratory equipment with particle filter. In the United States of <br />America, if respirators are used, a program should be instituted to assure compliance with OSHA <br />29 CFR 1910.134 and ANSI Z88.2. <br />Thermal hazards Wear appropriate thermal protective clothing, when necessary. <br />General hygiene When using, do not eat, drink or smoke. Wash hands before breaks and immediately after <br />considerations handling the product. Remove and isolate contaminated clothing and shoes. Handle in accordance <br />with good industrial hygiene and safety practice. Launder contaminated clothing before reuse. <br />9. Physical and chemical properties <br />Appearance White to straw yellow solution. <br />Physical state Liquid. <br />Form Liquid. <br />Color White to straw yellow. <br />Odor Pungent, sour penetrating odor. <br />Odor threshold Not available. <br />pH 1.2 <br />Melting point/freezing point -4 °F (-20 °C) <br />Initial boiling point and boiling 225 °F (107.22 °C) <br />range <br />Flash point Not available. <br />Evaporation rate Not available. <br />Flammability (solid, gas) <br />Not applicable. <br />Upper/lower flammability or explosive limits <br />Flammability limit - lower <br />Not available. <br />N <br />Flammability limit - upper <br />Not available. <br />N <br />Vapor pressure <br />218 mm Hg (100 °F / 38 °C) <br />Vapor density <br />Not available. <br />Relative density <br />1.22 t 0.03 <br />Relative density temperature <br />77 °F (25 °C) <br />Solubility(ies) <br />Solubility (water) <br />Completely soluble in water. <br />Partition coefficient <br />No data available. <br />(n-octanol/water) <br />Auto -ignition temperature <br />Not available. <br />Decomposition temperature <br />Not available. <br />Viscosity <br />Not available. <br />Other information <br />VOC (Weight %) <br />Not available <br />10. Stability and reactivity <br />Reactivity The product is non -reactive under normal conditions of use, storage and transport. <br />Chemical stability Stable at normal conditions. <br />Possibility of hazardous Contact with metals may evolve flammable hydrogen gas. <br />reactions <br />Conditions to avoid Keep away from water, steam or other incompatible materials. <br />Incompatible materials Glass. Stoneware. Metals. Bases. <br />Hazardous decomposition Hydrogen fluoride. Silicon tetrafluoride. Hydrogen gas. <br />products <br />Hydrofluosilicic acid <br />920631v Version #: 01 Revision date: 5/20/20 Issue date: 28-January-2015 <br />SDS US <br />4/8 <br />