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CALCIUM CARBIDEICSC: 0406
April 2017
CAS #: 75-20-7Calcium acetylide
Acetylenogen
UN #: 1402
EINECS #: 200-848-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible but forms flammable gas on contact with water or damp air. Many reactions may cause fire or explosion.  Risk of fire and explosion on contact with water.  NO contact with water.  Use non-sparking handtools. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use special powder, dry sand. NO other agents.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Laboured breathing. Shortness of breath. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. 
Skin Redness. Skin burns. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention. 
Eyes Redness. Pain. Blurred vision. Severe deep burns.  Wear safety goggles or eye protection in combination with breathing protection if powder.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Laboured breathing. Shock or collapse. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Sweep spilled substance into covered clean, dry containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT use water. 

According to UN GHS Criteria

flam;flamecorrexcl mark;warn
DANGER
In contact with water releases flammable gases which may ignite spontaneously
Causes severe skin burns and eye damage
May cause respiratory irritation 

Transportation
UN Classification
UN Hazard Class: 4.3; UN Pack Group: II 

STORAGE
Separated from incompatible materials. See Chemical Dangers. Dry. Well closed. 
PACKAGING
Airtight. 
CALCIUM CARBIDE ICSC: 0406
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
GREY CRYSTALS OR BLACK LUMPS WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Mixtures with silver nitrate and copper salts are shock-sensitive. Decomposes violently on contact with moisture or water. This produces highly flammable and explosive acetylene gas (ICSC 0089). This generates fire and explosion hazard. Reacts with chlorine, bromine, iodine, hydrogen chloride, lead, fluoride magnesium, sodium peroxide and sulfur. This generates fire and explosion hazard. Mixtures with iron (III) chloride, iron (III) oxide and tin (II) chloride ignite easily and burn fiercely. 

Formula: CaC2
Molecular mass: 64.1
Melting point: ~2300°C
Relative density (water = 1): 2.22
Solubility in water: reaction 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious local effects by all routes of exposure. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema, but only after initial corrosive effects on eyes and/or airways have become manifest. See Notes. 

Inhalation risk
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
It is strongly advised not to let the chemical enter into the environment. 

NOTES
Reacts violently with fire extinguishing agents such as water, producing explosive gas.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Also consult ICSC 0089 Acetylene. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F; R: 15; S: (2)-8-43 

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    See Also:
       Toxicological Abbreviations