Calcium Carbide

Identification of the substance or preparation
Product name: CALCIUM CARBIDE
Chemical formula: CaC2
CAS No.: 75-20-7
EINECS: 200-848-3

Hazards identification
Cabide is a strong hygroscopic substance and is decomposed already in
the air. Through reaction with the water arises acetylene. Acetylene is
an explosive gas. Lower explosion limit is 1.5 % vol., upper explosion
limit is 80.5 % vol. Acetylene is a combustible gas with flash point of
305 C, with temperature class T 2, explosion group II.C. Impurities in
carbidic acetylene can show themselves toxic - PH3, H2S. Taking
concentration of calcium oxide (16.5%) in concideration, it has toxic
effects on the eyes and respiratory tract.
Attention is required before the opening of drum leakage of inerting gas acetylene with nitrogen injected into the holes of the caps Warning during drums decanting boundary carbide is required inerting with nitrogen inlet valve from the continuous
flow during decanting

Physical and chemical properties
Physical properties, form, colour, odour: Powder or granules of violet-
black colour (0-80 mm). Odour like garlic similar to acetylene.
pH-value: basic
Change in condition:
Boiling point: 2300 C (101, 3 kPa)
Melting point: 1900 C
Decomposition temperature: Not applicable.
Flash point: acetylene - 305 C
Flammability: acetylene - 17, 8 C
Autoflammability: none
Danger of explosion: Forming of explosive compounds (acetylene - air)
in contact with water.
Explosion limits:
Lower: 1.5 % vol. of acetylene
Upper: 80.5 % vol. of acetylene
Oxidizing properties: not applicable
Vapour pressure: 0, 1 kPa (20 C)
Specific weight: (20 C) 2, 2 - 2, 7 g.cm
Solubility in/ miscibility with: -
Distribution coefficient: not applicable
Dynamic viscosity: not applicable