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 |