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Calcium Carbide

Calcium Carbide

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Product Description

Calcium Carbide
CAS No.: 75-20-7
Min. Order: 20 metric tons
Place of origin: Shandong province, China
Industry grade
Appearance: Colorless crystal, Ash black lumpish solid
Brand name: SHANGXIN

Calcium carbide is a chemical compound with the chemical formula of CaC2. Its main use industrially is in the production of acetylene and calcium cyanamide.
The pure material is colorless, however pieces of technical-grade calcium carbide are grey or brown and consist of only 80-85% of CaC2 (the rest is CaO, Ca3P2, CAS, Ca3N2, SiC, etc. ). Because of presence of pH3, NH3, and H2S, technical-grade calcium carbide has a distinctive smell which some find unpleasant.

Applications
1)Production of acetylene
2)Production of calcium cyanamide
3)Steelmaking
4)Carbide lamps
5)Other uses

In the ripening of fruit, calcium carbide is sometimes used as source of acetylene gas, which is a ripening agent similar to ethylene.
Calcium carbide is used in toy cannons such as the Big-Bang Cannon, as well as in bamboo cannons.
Calcium carbide, together with calcium phosphide, is used in floating, self-igniting naval signal flares, such as those produced by the Holmes' Marine Life Protection Association.

Calcium carbide
IUPAC name [hide]
Calcium Carbide
Identifiers
CAS number 75-20-7
PubChem 6352
ChemSpider 6112
Properties
Molecular formula CaC2
Molar mass 64.099 g/mol
Appearance White powder to grey/black crystals
Density 2.22 g/cm 3
Melting point 2160 ° C, 2433 K, 3920 ° F
Boiling point 2300 ° C, 2573 K, 4172 ° F
Solubility in water decomposes
Structure
Crystal structure Tetragonal
Space group D 17 4h, I4/mmm, tI6
Coordination
geometry
6
Thermochemistry
Std enthalpy of
formation Δ f H o 298
− 63 kJ· mol − 1
Standard molar
entropy S o 298
70 J· mol − 1 · K − 1
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