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CALCIUM OXIDE (CaO; colorless crystals or white powder; <br /> standard 5 mg/m3). Used as a component in the manufacture <br /> of bricks, plaster, mortar, stucco, fungicides, and insecticides. <br /> In the food industry it is'a yeast food and dough conditioner <br /> for bread, rolls, and buns, a clarifier for beet- and cane-sugar <br /> juices, and an alkali for dairy products, such as ice cream. <br /> A strong caustic, in high concentrations calcium oxide can cause <br /> dermatitis and can severely irritate eyes, mucous membranes, <br /> and the upper respiratory tract. Also called quicklime. <br /> • CA U500 CAS:1305-78-8 HR:,I <br /> CALCIUM OXIDE <br /> DOT: UN 1910 <br /> mf: CaO mw: 56.08 <br /> PROP: Cubic, white crystals. Mp: 2580°, d: 3.37, bp: <br /> 2850°.Sol in water and glycerin;insol in alc. <br /> SYNS:BURNT LIME O CALCIA O CALX O LIME O LIME,BURNED <br /> O LIME,UNSLAKED(DOT)O OXYDE de CALCIUM(FRENCH) <br /> O QUICKLIME(DOT)O WAPNIOWY TLENEK(POLISH) <br /> CONSENSUS REPORTS: Reported in EPA TSCA In- <br /> ventory. <br /> OSHA PEL:TWA 5 mg/m' <br /> ACGIH TLV:TWA 2 mg/m' <br /> DFG MAK: 5 mg/m' <br /> DOT Classification: ORM-B; Label: None. <br /> SAFETY PROFILE: A caustic and irritating material. <br /> See also CALCIUM COMPOUNDS. A common.air <br /> contaminant. A powerful caustic to living tissue. The <br /> powdered oxide may react explosively with water. Mix- <br /> tures with ethanol may ignite if heated and thus can <br /> cause an air-vapor explosion. Violent reaction with <br /> (BZO, + CaCI);interhalogens(e.g.,BF,; CIF,);F2i HF; <br /> PZOS + heat; water. Incandescent reaction with liquid <br /> HF. Incompatible with phosphorus(V)oxide. <br />