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1305-78-8 - Calcium oxide, Puratronic®, 99.998% (metals basis, excluding other alkaline earth and alkali metals 130ppm max) - 10684 - Alfa Aesar

10684 Calcium oxide, Puratronic®, 99.998% (metals basis, excluding other alkaline earth and alkali metals 130ppm max)

Codice CAS
1305-78-8
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
2g 34,00
10g 116,00
50g 404,00
250g 1716,00
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Calcium oxide, Puratronic®, 99.998% (metals basis, excluding other alkaline earth and alkali metals 130ppm max)

MDL
MFCD00010911
EINECS
215-138-9

Proprietà chimiche

Formula
CaO
Peso formula
56.08
Modulo
Powder
Punto di fusione
2572°
Punto di ebollizione
2850°
Densità
3.37
Indice di rifrazione
1.8300
Sensibilità
Air & Moisture Sensitive
Solubilità
Slightly soluble in water. Insoluble in ethanol. Soluble in glycerol.

Applicazioni

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.

Note

Reaction of calcium oxide with water is highly exothermic, & can ignite combustible materials. The aqueous solution of calcium oxide spontaneously reacts with carbon dioxide from air to form calcium carbonate.

Letteratura

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.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H315-H318-H335

Causes skin irritation. Causes serious eye damage. May cause respiratory irritation.

Dichiarazioni precauzionali: 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.

Altri riferimenti

Merck
14,1686
Classe di rischio
8
Gruppo di imballaggio
III
Codice tariffe armonizzato
2825.90
TSCA
Yes
RTECS
EW3100000

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