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2-METHYLBUT-3-YN-2-OLICSC: 1746
November 2009
CAS #: 115-19-52-Methyl-3-butyn-2-ol
Ethynyldimethylcarbinol
UN #: 1987
EINECS #: 204-070-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable.  Vapour/air mixtures are explosive. Risk of explosion on contact with copper.  If powder: NO open flames, NO sparks, and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  Use carbon dioxide, foam, dry powder. NO water.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact of the substance with water. 

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough.  Use ventilation.  Fresh air, rest. 
Skin   Protective gloves.  Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety goggles.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion Dizziness.  Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer. 

According to UN GHS Criteria

flam;flameexcl mark;warn
DANGER
Highly flammable liquid and vapour
Harmful if swallowed
Causes eye irritation 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: II 

STORAGE
Fireproof. Separated from strong oxidants, acids and copper. Cool. 
PACKAGING
 
2-METHYLBUT-3-YN-2-OL ICSC: 1746
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
The vapour mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
Reacts with oxidants. Reacts with copper. This generates explosion hazard. Reacts violently with acids. Heating may cause violent combustion or explosion. Decomposes on contact with hot surfaces or flames. This produces irritating fumes. 

Formula: C5H8O/(CH3)2C(OH)CCH
Molecular mass: 84.1
Boiling point: 104-105°C
Melting point: 2.6°C
Density (gas): 0.9 kg/m³
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 2
Relative vapour density (air = 1): 2.9
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.04
Flash point: 20°C c.c.
Auto-ignition temperature: 350°C
Explosive limits, vol% in air: 1.8-16
Octanol/water partition coefficient as log Pow: 0.318  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       2-Methylbut-3-yn-2-ol  (SIDS)