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HYDROCHLORIC ACID, 33 - 40% <br />document, Industrial Ventilation, A Manaral of Recommended Practices, most recent edition for d <br />Personal Respirators (NIOSH Approved): <br />If the exposure limit is exceeded, a full facepiece respirator with an acid gas cartrid ~ etails. <br />times the exposure limit or the maximum use concentration specified by the appropriate reQulato <br />respirator supplier, whichever is lowest. For emergencies ge may be worn up to SO <br />use afull-facepiece positive- ressure a' _ ~ or instances where the ex osure lev ry agency or <br />P it supplied respirator. WARNING: Air purifying respirators do not own, <br />protect workers in oxygen-deficient atmospheres. <br />Skin Protection: <br />Rubber or neoprene gloves and additional protection including impervious boots a ron <br />in areas of unusual exposure to prevent skin contact. <br />p , or coveralls, as needed <br />Eye Protection: <br />Use chemical safety goggles and/or a full face shield where splashing is possible. Maintain e <br />__ _ and quick-drench facilities in work area. ye wash fountain <br />9. Physical and Chemical Pro ernes <br />p <br />Appearance: <br />Colorless, fuming liquid. <br />Odor: <br />Pungent odor of hydrogen chloride. <br />Solubility: <br />Infinite in water with slight evolution of heat. <br />Density: <br />1.18 <br />pH: <br />For HCL solutions: 0.1 (1.0 N), l . l (0.1 N), 2.02 (0.01 N) <br />Volatiles by volume @ 21C (70F): <br />100 <br />Boiling Point: <br />53C (127F) Azeotrope (20.2%) boils at 109C (228F) <br />Melting Point: <br />-74C (-lO1F) <br />Vapor Density (Air=1): <br />No information found. <br />Vapor Pressure (mm Hg): <br />190 @ 25C (77F) <br />Evaporation Rate (BuAc=1): <br />No information found. <br />70. Stability and Reactivity <br />Stability: <br />Stable under ordinary conditions of use and storage. Containers may burst when heated. <br />Hazardous Decomposition Products: <br />When heated to decomposition, emits toxic hydrogen chloride fumes and will react with water or steam to <br />produce heat and toxic and corrosive fumes. Thermal oxidative decomposition produces toxic chlorine fumes <br />and explosive hydrogen gas. <br />Hazardous Polymerization: <br />Will not occur. <br />ompatibilities: <br />xong mineral acid, concentrated hydrochloric acid is incompatible with many substances and highly reactive <br />ile:///W~/Customers/JeffPiper conversions/Msdsi/1/H3880.htm (4 of 7) [10/1g/2001 422:26 PM] <br />