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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)

CAS Number
1305-78-8
Synonyms

Size Price ($) Quantity Availability
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

Chemical Properties

Formula
CaO
Formula Weight
56.08
Form
Powder
Melting point
2572°
Boiling Point
2850°
Density
3.37
Refractive Index
1.8300
Sensitivity
Air & Moisture Sensitive
Solubility
Slightly soluble in water. Insoluble in ethanol. Soluble in glycerol.

Applications

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.

Notes

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.

Literature References

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.

GHS Hazard and Precautionary Statements

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.

Other References

Merck
14,1686
Hazard Class
8
Packing Group
III
Harmonized Tariff Code
2825.90
TSCA
Yes
RTECS
EW3100000

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