Calcium Hydroxide

CAS #: 1305-62-0

Synonyms: Calcium hydrate; hydrated lime; caustic lime; slacked lime.

Uses: Motar, plasters, cements, calcium salts, causticizing soda, depilatory, unhairing of hides, whitewash, soil conditioner, ammonia recovery in gas manufature, disinfectant, water softening, purification of sugar juices, accelerator for low- grade rubber compounds, petrochemicals, food additive as a buffer and nuetralizing agent, shell- forming agent (poultry).

Hazard: Dust irritates eyes, nose and throat.  The nitroparaffins, nitromethane, nitropropane, etc. form salts with inorganic bases such as CALCIUM HYDROXIDE. The dry salts are explosive.  Bases are chemically similar to sodium hydroxide (NaOH) or sodium oxide (Na2O).  They neutralize acids exothermically to form salts plus water.  When soluble in water they give solutions having a pH greater than 7.0.  Mixing these materials with water can generate troublesome amounts of heat as the base is dissolved or diluted.  Bases react with certain metals (such as aluminum and zinc) to form oxides or hydroxides of the metal and generate gaseous hydrogen.  Bases may initiate polymerization reactions in polymerizable organic compounds, especially  epoxides).  They may generate flammable and/or toxic gases with ammonium salts, nitrides, halogenated organics, various metals, peroxides, and hydroperoxides.  Materials of this group often serve as catalysts. A strong base. Forms caustic solution in water.