2014-09-29_PERMIT FILE - M2012032

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Product Safety Assessment: DOWTm Methyl lsobutyl Carbinol • Process — DOWTM methyl isobutyl carbinol is recovered as a co- product during methyl isobutyl ketone (MIBK) manufacture or produced by hydrogenation of MIBK.8 Back to top Product Description9 DOWTM methyl isobutyl carbinol is a flammable, colorless stable liquid with a mild alcohol odor. It is slightly soluble in water and miscible with most organic solvents. Back to top Product Uses10,11 The major application of methyl isobutyl carbinol is in the manufacture of lube -oil additives, followed by its use as a flotation frother in treating copper ore and ores of other metals. Use as a solvent in surface coatings comprises a minor portion of MIBC consumption. Back to too Uses for Methyl lsobutyl Carbinol10 Lube -oil Exposure Potential 12,13 DOWTM methyl isobutyl carbinol is used in the production of industrial products. Based on the uses for this material, the public could be exposed through: • Workplace exposure — Exposure can occur either in a methyl isobutyl carbinol manufacturing facility or in the various industrial or manufacturing facilities that use this material. In most applications, this product is produced, distributed, stored, and consumed in closed systems. Those working with methyl isobutyl carbinol in manufacturing, mining, coating or other operations could be exposed during maintenance, sampling, testing, or other procedures. Each manufacturing facility should have a thorough training program for employees and appropriate work processes, ventilation, and safety equipment in place to limit unnecessary exposure. See Health Information. • Consumer exposure to products containing methyl isobutyl carbinol — Dow does not sell methyl isobutyl carbinol for direct consumer use, and it is unlikely to be present in any product a consumer would handle. See Health Information. • Environmental releases — Methyl isobutyl carbinol is moderately volatile and moderately soluble in water. Once introduced to water it will have a tendency to remain in water. Because methyl isobutyl carbinol is readily biodegradable, it will be removed by sewage treatment plants. In the event of a spill, the focus is on containing the spill to prevent contamination of soil and surface or ground water. Eliminate all sources of ignition immediately. See Environmental, Health, and Physical Hazard Information. • Large release — Industrial spills or releases are infrequent and generally contained. If a large spill does occur, the material should be captured, collected, and reprocessed or disposed of according to applicable governmental requirements. Positive - pressure, self- contained breathing apparatus (SCBA) with an approved full -face mask is recommended for emergency work. Eliminate all sources of ignition immediately. Use only explosion -proof equipment. Ground and bond all containers and handling equipment. See Environmental, Health, and Physical Hazard Information. • In case of fire — Deny any unnecessary entry into the area. Use water fog or fine spray, dry- chemical or carbon - dioxide extinguishers, or foam to fight the fire. Alcohol- resistant foam is a'" Trademark of The Dow Chemical Company ( "Dow ") or an affiliated company of Dow Created: June 26, 2009 The Dow Chemical Company Page 2 of 6