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Calcium carbide

CAS:
75-20-7
MF:
C2Ca
MW:
64.1

Properties

Melting point:
447°C
Boiling point:
2300°C
Density 
2.22 g/mL at 25 °C(lit.)
storage temp. 
water-free area
form 
pieces
color 
Gray-black
Specific Gravity
2.22
Water Solubility 
hydrolyses
Sensitive 
Moisture Sensitive
Merck 
14,1656
BRN 
3909011
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, alcohols, hydrogen chloride, magnesium.
InChIKey
UIXRSLJINYRGFQ-UHFFFAOYSA-N

Safety Information

Symbol(GHS) 

GHS02,GHS05,GHS07
Signal word 
Danger
Hazard statements 
H261-H260-H315-H318-H335
Precautionary statements 
P223-P231+P232-P261-P280-P370+P378-P422-P305+P351+P338-P405-P501a
Hazard Codes 
F
Risk Statements 
15-41-37/38
Safety Statements 
8-43-43A-39-26
RIDADR 
UN 1402 4.3/PG 2
WGK Germany 
1
10-21
TSCA 
Yes
HazardClass 
4.3
PackingGroup 
II
HS Code 
28491000

Use

Calcium carbide (molecule formula: CaC2), is a kind of important chemical raw materials produced from the chemical processing of limestone. In 1892, H. Maysan (French) and H. Wilson (United state) simultaneously developed a calcium carbide production approach based on furnace Reduction. The United State had successfully achieved industrial production in 1895. The property of calcium carbide is related to its purity. Its industrial product is mostly the mixture of calcium carbide and calcium oxide, and also contains trace amounts of sulfur, phosphorus, nitrogen and other impurities. With the increasing content of impurities, it color exhibits gray, brown to black. The melting point and electrical conductivity both decrease with the decrease of the purity. The purity of its industrial product is usually 80% with m.p. being 1800~2000 C. At room temperature, it does not react with air, but it can have oxidation reaction at above 350 ℃, and have reaction with nitrogen at 600~700 ℃ to generate calcium cyanamide. Calcium carbide, when coming across with water or steam, generates acetylene and release a large amount of heating. CaC2 + 2H2O─ C2H2 + Ca (OH) 2 + 125185.32J, 1kg of pure calcium carbide can produce 366 L of acetylene 366l (15 ℃, 0.1MPa). Thereby, for its storage: calcium carbide should be strictly kept away from water. It is usually packed in a sealed iron container, and sometimes stored in a dry warehouse being filled with nitrogen if necessary. Electric furnace reduction method is the only method for industrial production of calcium carbide at present. Put calcium oxide and coke for reduction reaction at 2000~2200 ℃: CaO + 3C─ CaC2 + CO-480644.64J, the resulting molten calcium carbide flow into the receiver tank from the bottom of the reactor, and we obtain the final product after cooling. Calcium carbide production belongs to high temperature operation with relative large amount dust being produced and consuming a large amount of electrical energy. In 1980s, the production of per ton of calcium carbide consumes industrial power of about 10~11GJ. In order to reduce the power consumption, people mostly apply large-scale and closed calcium carbide furnace to reduce heat loss and also do good to the recycling of carbon monoxide.

116 supplier list of "Calcium carbide"

  • Product Name:Calcium carbide
  • Products Intro:Purity: 99% | Package: 100g,500g,1kg,5kg,10kg
  • Company Type: Reagent
  • Country/Region: CHINA
  • Main Products: Speciality Chemicals
  • Product Name:75-20-7
  • Products Intro:Purity: 0.99 | Package: 25KG,5KG;1KG;500G
  • Company Type: Trader
  • Country/Region: CHINA

    $10.00/ 1KG

  • Product Name:Calcium carbide
  • Products Intro:Purity: 99% | Package: 1KG;10USD
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  • Country/Region: CHINA
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  • Main Products: UDDA
  • Product Name:Calcium carbide
  • Products Intro:Purity: 0.99 | Package: 5KG;1KG
  • Company Type: Trader
  • Country/Region: CHINA
  • Product Name:75-20-7
  • Products Intro:Purity: 0.99 | Package: 5KG;1KG/aluminum foil package; 25kg/drum | CustNote: Paypal,credit card,western union,bank transfer
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  • Country/Region: CHINA
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    $1.00/ 1KG

  • Product Name:Calcium carbide
  • Products Intro:Purity: 99% | Package: 1KG;1USD
  • Company Type: Trader
  • Country/Region: CHINA
  • Product Name:Calcium carbide
  • Products Intro:Purity: 97% | Package: 1g/25g/100g/500g/1kg/bulk package
  • Company Type: Trader
  • Country/Region: CHINA
  • Product Name:Calcium Carbide
  • Products Intro:Purity: 0.99 | Package: 1kg,5kg,25kgs,200kgs;bulk
  • Company Type: Trader
  • Country/Region: CHINA
  • Main Products: Octane booster,lubricant additve,specialty chemicals,ingredients
  • Product Name:Calcium carbide
  • Products Intro:Purity: 99% contact email: Jessie@coreychem.com | Package: 1g;2.3USD
  • Company Type: Trader
  • Country/Region: CHINA

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