Name | Calcium carbide |
Synonyms | Calciumcarbid carburocalcico Quartz crystal Calcium carbide calciumdicarbide carburedecalcium calcium acetylide calcium ethynediide calciumcarbide(cac2) carburedecalcium(french) Calcium Carbide, 10-40 Mesh Calcium Carbide, Anhydrous Calciumcarbidemetallurggradegreylumpsmm |
CAS | 75-20-7 |
EINECS | 200-848-3 |
InChI | InChI=1/C2H2.Ca/c1-2;/h1-2H;/q;+2 |
InChIKey | UIXRSLJINYRGFQ-UHFFFAOYSA-N |
Molecular Formula | C2Ca |
Molar Mass | 64.1 |
Density | 2.22g/mLat 25°C(lit.) |
Melting Point | 447°C |
Boling Point | 2300°C |
Water Solubility | hydrolyses |
Appearance | pieces |
Specific Gravity | 2.22 |
Color | Gray-black |
Exposure Limit | ACGIH: TWA 2 mg/m3OSHA: TWA 5 mg/m3NIOSH: IDLH 25 mg/m3; TWA 2 mg/m3 |
Merck | 14,1656 |
BRN | 3909011 |
Storage Condition | water-free area |
Stability | Stability Reacts violently with water liberating highly flammable gas (acetylene). Do not use water if this material is involved in a fire. Incompatible with moisture, water, strong oxidizing agents, |
Sensitive | Moisture Sensitive |
Physical and Chemical Properties | Industrial traits are gray, yellow-brown or black solid, containing calcium carbide higher purple. melting point 2300 ℃ relative density 2.22 |
Use | For the production of acetylene gas, polyvinyl chloride, lime nitrogen, dicyandiamide, iron and steel desulfurization agent |
Hazard Symbols | F - Flammable |
Risk Codes | R15 - Contact with water liberates extremely flammable gases R41 - Risk of serious damage to eyes R37/38 - Irritating to respiratory system and skin. |
Safety Description | S8 - Keep container dry. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S43A - S39 - Wear eye / face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
UN IDs | UN 1402 4.3/PG 2 |
WGK Germany | 1 |
FLUKA BRAND F CODES | 10-21 |
TSCA | Yes |
HS Code | 28491000 |
Hazard Class | 4.3 |
Packing Group | II |
industrial products are gray, yellow-brown or black solids that contain higher levels of calcium carbide in the purple color. The new fracture surface of calcium carbide is glossy, and the gloss is gray-white due to the absorption of moisture in the air. The relative density was 2. 22. Industrial products generally contain 80% calcium carbide. Melting point 2300 °c. Conductive, the higher the purity, the more conductive. The chemical properties are very active, and can react with many gases and solutions at appropriate temperatures. The intense decomposition in water produces acetylene gas and calcium hydroxide, and releases a large amount of heat. With chlorine, hydrogen chloride, sulfur, phosphorus, ethanol, etc. at high temperature can occur intense chemical reaction.
The Coke and lime are crushed, mixed and evenly added into a closed Calcium Carbide Furnace according to a certain ratio, and heated by electricity. The reaction at high temperature generates molten calcium carbide, and the calcium carbide flows from the furnace into the calcium carbide pot for cooling, crushing and packaging into the barrel.
acetylene gas can be generated by the interaction of calcium carbide and water, which is an important basic raw material for organic synthesis. Acetylene gas can be prepared from polyvinyl chloride, Chloroprene Rubber, calcium cyanamide, acetic acid, vinyl acetate ethanol and its derivatives, cyanide
Compound, dicyanamide and acetone, etc. Calcium carbide and nitrogen to generate lime nitrogen can be used as agricultural fertilizer. The use of calcium carbide to generate acetylene for metal cutting and welding.