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On Calcium Carbide
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time2012/12/19
Calcium carbide, calcium carbide, inorganic compounds. Colorless crystals, industrial gray color bar, the cross section for the purple or gray. Violent reaction with water occurs immediately, acetylene, and release heat. Calcium carbide is an important basic chemical raw materials, mainly used to produce acetylene gas. Also used in organic synthesis, oxy-acetylene welding.
Introduction：
Chinese name: Calcium carbide
English name: calcium carbide,
Chinese name: calcium carbide
English name: acetylenogen
CAS No.: 75-20-7
Molecular formula: CaC2
Electronic: Ca2 +: C ≡ C:] 2 - the middle of the "≡" represents the three pairs of shared electronic
Molecular Weight: 64.10
EINECS No.: 200-848-3
InChI: InChI = 1/C2. Ca/c1-2 ;/ q-2; +2
Melting point: 447 ℃
Density: 2.22
Boiling point: 2300 ℃
Main components:
Properties: brown or black solid block of pure product as colorless crystals (with CaC2 high purple). Density of 2.22 grams / cubic centimeter, the melting point of 447 ° C, boiling point 2300 ° C, the water a violent reaction occurred immediately, acetylene, and release heat, different melting point of calcium carbide content also changes.
Impurities: calcium carbide often contain arsenic calcium (Ca3 As2), the phosphide calcium (Ca3 P2), and so impurities, and water when the release of arsine (AsH3), phosphine (PH3) and other toxic gases, the use by the calcium carbide to produce acetylene toxic (to be removed by concentrated H2SO4 and potassium dichromate lotion). Relative density (water = 1): 2.22
Introduction：
Chinese name: Calcium carbide
English name: calcium carbide,
Chinese name: calcium carbide
English name: acetylenogen
CAS No.: 75-20-7
Molecular formula: CaC2
Electronic: Ca2 +: C ≡ C:] 2 - the middle of the "≡" represents the three pairs of shared electronic
Molecular Weight: 64.10
EINECS No.: 200-848-3
InChI: InChI = 1/C2. Ca/c1-2 ;/ q-2; +2
Melting point: 447 ℃
Density: 2.22
Boiling point: 2300 ℃
Main components:
Properties: brown or black solid block of pure product as colorless crystals (with CaC2 high purple). Density of 2.22 grams / cubic centimeter, the melting point of 447 ° C, boiling point 2300 ° C, the water a violent reaction occurred immediately, acetylene, and release heat, different melting point of calcium carbide content also changes.
Impurities: calcium carbide often contain arsenic calcium (Ca3 As2), the phosphide calcium (Ca3 P2), and so impurities, and water when the release of arsine (AsH3), phosphine (PH3) and other toxic gases, the use by the calcium carbide to produce acetylene toxic (to be removed by concentrated H2SO4 and potassium dichromate lotion). Relative density (water = 1): 2.22