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Calcium Carbide





Standard GB10665-2004


Packing & Storage

Packing in 100KG, 50KG Drums
Storage 20°C 2 years
Shipping Room temperature 5-30℃ in China; may vary elsewhere
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General Information
Chemical & Physical Properties
Safety Information
Synthetic Route

Common Names

Calcium Carbide





Boiling Point(℃)

2300 ℃

Molecular Weight


Melting Point(℃)

447 ℃


Gray crystals or black clumps

Vapor Specific Gravity

No data available

HS Code


Flash Point(℃)

No data available



Autoignition Temperature(℃)

390 °C

Safety Phrases Danger
WGK Germany  
Packaging Group I
Hazard Class 4.3
Inhalation May cause respiratory irritation Avoid breathing dust/ fume/ gas/ mist/ vapours/ spray Remove victim to fresh air and keep at rest in a positioncomfortable for breathing. Call a POISON CENTER or doctor/ physician if you feel unwell.
Skin Causes skin irritation Wear protective gloves/ eye protection/ face protection Wash with plenty of soap and water
Eyes Serious eye damage Wear protective gloves/ eye protection/ face protection Rinse cautiously with water for sever
Ingestion Toxic to aquatic life Wear protective gloves/ eye protection/ face protection Get medical advice/ attention
Drying of carbon-based raw materials in order to obtain dried carbon-based raw materials; The dried carbon-based raw materials and calcium-based raw materials were crushed respectively to obtain carbon-based particles and calcium-based particles. The carbon-based particles and calcium-based particles were mixed to obtain the mixed materials. The mixed materials are pyrolyzed to obtain high quality tar, high calorific value gas and pyrolytic solid products, which contain quicklime and one of the selected coke, semi-coke and carbon black; And the pyrolytic solid products are input into the arc furnace at a temperature of not less than 450 degrees Celsius for smelting treatment in the arc furnace, and calcium carbide is obtained. This can further improve heat utilization and production efficiency, reduce production costs, reduce energy consumption and pollution
Frequently Asked Questions

What is Calcium Carbide?

Calcium carbide is a chemical compound with the formula CaC2. It is composed of calcium and carbon atoms and is primarily used in industrial applications. Here are some key points about calcium carbide:

1. Production: Calcium carbide is produced by heating lime (calcium oxide, CaO) and carbon in an electric arc furnace at temperatures above 2,200 degrees Celsius (4,000 degrees Fahrenheit). The reaction that takes place is as follows:

CaO + 3C → CaC2 + CO

2. Physical properties: Calcium carbide is a grayish-black solid with a crystalline structure. It has a density of around 2.22 grams per cubic centimeter. The compound is insoluble in water but reacts vigorously with it to produce acetylene gas.

3. Acetylene production: One of the primary uses of calcium carbide is the production of acetylene gas (C2H2). When calcium carbide reacts with water, it undergoes hydrolysis to produce acetylene and calcium hydroxide:

CaC2 + 2H2O → C2H2 + Ca(OH)2

Acetylene gas is highly flammable and is used in various industrial applications, including welding and cutting metals, as well as in the production of chemicals like vinyl chloride and acetaldehyde.

4. Other applications: Besides acetylene production, calcium carbide has some other uses as well. It can be used as a desulfurizing agent in steelmaking, as a reducing agent in the production of metals like titanium, and as a source of carbon in the production of calcium cyanamide, a nitrogen fertilizer.

5. Safety considerations: Calcium carbide reacts violently with water, releasing flammable acetylene gas. Therefore, it should be handled with care and stored in a dry environment away from moisture. It is important to follow proper safety protocols and guidelines when working with calcium carbide.


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