cas 75-20-7 Calcium carbide C2Ca

Calcium carbide

calciuM carbide;CaC2; acetylene stones;calciuM acetylide(ca(c2));calciuM carbide(cac2);carburedecalciuM;carburede calciuM(french);carburo calcic;ethyne,calciuM

CAS：75-20-7

Gas yield: 295L/KG MIN; content:88%;90%

alcium carbide - Names and Identifiers
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
Calcium carbide - Physico-chemical Properties
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
Calcium carbide - Risk and Safety
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
Calcium carbide - Upstream Downstream Industry
Raw Materials
Coke(coal)
Calcium carbonate
Carbon nanotubes
Calcium carbonate
Calcium carbonate
Calcium oxide
Calcium oxide
Downstream Products
calcium cyanamide
acetylene
1,1-difluoroethane
2-Butene-1,4-diol
2-Butyne-1,4-diol
Propargyl alcohol
Trichloroethylene
vinyl chloride pressure tin with 250 ml ~225 G net
Calcium carbide - Nature
Open DataVerified Data
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.
Last Update：2025-06-10 22:55:16
Calcium carbide - Preparation Method
Open DataVerified Data
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.
Last Update：2022-01-01 10:54:30
Calcium carbide - Application
Open DataVerified Data
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.
Last Update：2025-08-19 16:24:40
Calcium carbide - Safety
Open DataVerified Data
• calcium carbide powder is irritating, and Ca(OH)2 is generated by touching sweat on the skin, which burns the skin until the skin is ulcerated. Inhalation can harm the human respiratory system. Wear goggles, masks, and gloves at work. The gas in the barrel should be discharged when handling and before storage. It is strictly prohibited to roll the barrel, replay and collision to prevent spark and explosion. Welding and soldering are strictly prohibited when the package is damaged. It is forbidden to use water for fire fighting. It can only be used for fire extinguishing with sand or carbon dioxide, and it can also be used for fire extinguishing with dry sodium carbonate (soda ash powder). Find dizziness, Head Pain or Vomit, should immediately move to fresh air. Severe cases should be sent to the hospital for treatment. Packed in an iron drum with a wall thickness of not less than 1mm, with either lOOkg or 200kg. The side of the iron drum is marked with paint "Calcium Carbide to avoid water and fire.
• calcium carbide should be stored in a dry, cool, ventilated warehouse, and flammable items and strong acids to Isolation. It is best to store it in a special library. Avoid contact with water and moisture. Before storage, the acetylene gas in the barrel should be vented. The shelf life is preferably 6 to 12 months.