What is Calcium Carbide
Calcium carbide, inorganic compounds, white crystals, most appearance are gray black blocks, and the cross section is purple or gray. In case of water, it immediately reacts violently to generate acetylene and release heat. Calcium carbide is an important basic chemical raw material, which is mainly used to produce acetylene gas. It is also used in organic synthesis, oxyacetylene welding, etc.
Brief Introduction:
Product Name: Calcium carbide
Other Name:acetylenogen
CAS No:75-20-7
Molecular Formula:CaC2
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℃
Physical and chemical properties: the ore is yellowish brown or black massive solid, and the pure product is white crystal (purple with higher CaC2). The density is 2.22 g / cubic centimeter, the melting point is 447 ℃, the boiling point is 2300 ℃. When it meets water, it immediately reacts violently to generate acetylene and release heat. The melting point also changes with the content of calcium carbide.
Impurities: calcium arsenide (CA3 as2), calcium phosphide (CA3 P2) and other impurities are often contained in calcium carbide, which will release toxic gases such as hydrogen arsenide (AsH3), phosphine (PH3) when acting with water.
Therefore, acetylene produced by calcium carbide is toxic (it must be removed by concentrated H2SO4 and potassium dichromate washing solution). Relative density (water =1):2.22.
