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Calcium oxide has wide-ranging utility in industry. It is used in making porcelain, cements, mortars, and glass. It is also employed in flue-gas desulfurization in power plants, purifying sugar, drying the solvents/reagents, preparing bleaching powder, calcium carbide, and calcium cyanamide. It also finds use in water softeners, chemical recovery at Kraft pulp mills, biodiesel production, and in petroleum industry for the detection of traces of water. In agriculture it is used to restore the pH of acidic soils (liming). It is useful as a basic catalyst & acid scavenger in several organic transformations, for example, in Arndt-Eistert Synthesis of alpha-diazoketones, synthesis of heterocycles and oximes.
Ibrahim, H.; Ahmed, A. S.; Bugaje, I.; Mohammed-Dabo; Ugwumma, C. D. Synthesis of Bulk Calcium Oxide (Cao) Catalyst and its Efficacyfor Biodiesel Production. J. Energ. Tech. Pol. 2013, 3 (12), 14-16.
Pramanik, S.; Kamal K. K. Nanohydroxyapatite Synthesized from Calcium Oxide and its Characterization. Int. J. Adv. Manuf. Tech. 2013, 66 (5-8), 1181-1189.
Safaei-Ghomi, J.; Ghasemzadeh, M. A.; Mehrabi, M. Calcium oxide nanoparticles catalyzed one-step multicomponent synthesis of highly substituted pyridines in aqueous ethanol media. Scientia Iranica 2013, 20 (3), 549-554.
Pace, V.; Verniest, G.; Sinisterra, J.-V.; Alcántara, A. R.; De Kimpe, N. Improved Arndt-Eistert Synthesis of α-Diazoketones Requiring Minimal Diazomethane in the Presence of Calcium Oxide as Acid Scavenger. J. Org. Chem. 2010, 75, 5760-5763.
Hazard Statements: H315-H318-H335
Causes skin irritation. Causes serious eye damage. May cause respiratory irritation.
Precautionary Statements: P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.