Calcium carbide

  • Acetylenogen
  • Calcium acetylide
Formula
C2Ca
Structure
Description
Grayish-black irregular lump solid.
Uses
Reducing agent, fire signals, welding & cutting metals, manufacture of calcium, iron, alloys, lampblack, cyanamide.

Registry Numbers and Inventories.
CAS
75-20-7
EC (EINECS/ELINCS)
200-848-3
EC Index Number
006-004-00-9
EC Class
Highly flammable
RTECS
EV9400000
UN (DOT)
1402
Merck
12,1696
Beilstein/Gmelin
41757 (G)
Swiss Giftliste 1
G-1347
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2Ca
Formula mass
64.10
Melting point, °C
2300
Decomposition point, °C
1260
Vapor density (air=1)
2.2
Density
2.22 g/cm3 (20 C)
Solubility in water
Decomposes

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water. Keep containers tightly closed. Store in metal containers.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Use a spark-proof tool. Do not expose spill to water.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Incompatible with water, hydrogen chloride, lead fluoride, magnesium, selenium, silver nitrate, sulfur, silver nitrate, sodium peroxide, stannous chloride, potassium hydroxide and chlorine.
Decomposition
Carbon monoxide, carbon dioxide, calcium oxide.

Fire.
Fire fighting
Do not use water. Use graphite, soda ash, powdered sodium chloride, or suitable dry powder. Carbon dioxide may be ineffective.
Fire potential
Very flammable.
Hazards
If wet by water, highly flammable acetylene gas is formed.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
3
 
 
Reactivity
2
 
 
Special
W

Health.
Poison_Class
4
Exposure effects
   Ingestion
Causes gastrointestinal tract burns.
   Inhalation
May cause severe irritation of the upper respiratory tract with pain, burns, and inflammation.
   Skin
Contact with skin causes irritation and possible burns, especially if the skin is wet or moist. May cause deep, penetrating ulcers of the skin.
   Eyes
Causes severe eye burns. May cause blindness. May cause opacity and scarring.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1402
Response guide
Hazard class
4.3
Packing Group
I; II
 
USCG CHRIS Code
CCB
 
Std. Transport #
4916408