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DIACETONE ALCOHOLICSC: 0647
4-Hydroxy-4-methylpentan-2-one
2-Pentanone, 4-hydroxy-4-methyl-
4-Hydroxy-2-keto-4-methylpentane
4-Hydroxy-4-methyl-2-pentanone
April 2005
CAS #: 123-42-2
UN #: 1148
EC Number: 204-626-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable. See Notes.  Above 58°C explosive vapour/air mixtures may be formed. See Notes.  NO open flames, NO sparks and NO smoking.  Above °C use a closed system, ventilation and explosion-proof electrical equipment. Use non-sparking handtools.  Use water spray, alcohol-resistant foam, dry powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness. Dry skin. MAY BE ABSORBED!  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Cover the spilled material with inert absorbent. Carefully collect remainder. 

According to UN GHS Criteria

 

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

STORAGE
Fireproof. Separated from acids, bases, amines and oxidants. 
PACKAGING
 
DIACETONE ALCOHOL ICSC: 0647
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on heating or on burning or on contact with acids, bases and amines. This produces acetone and mesityl alcohol. Reacts violently with oxidants. This produces flammable/explosive gas (hydrogen - see ICSC 0001). 

Formula: C6H12O2 / (CH3)2C(OH)CH2COCH3
Molecular mass: 116.2
Boiling point: 169-171°C
Melting point: -47°C
Relative density (water = 1): 0.93
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 0.108
Relative vapour density (air = 1): 4.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0048
Flash point: 58°C c.c.
Auto-ignition temperature: 640°C
Explosive limits, vol% in air: 1.8-6.9
Octanol/water partition coefficient as log Pow: -0.14 - 1.03 (calculated) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis. Exposure far above the OEL could cause lowering of consciousness. 

Inhalation risk
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
The substance defats the skin, which may cause dryness or cracking. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 50 ppm as TWA.
MAK: 96 mg/m3, 20 ppm; peak limitation category: I(2); skin absorption (H); pregnancy risk group: D 

ENVIRONMENT
 

NOTES
This card is only valid for the pure substance.
The technical product may contain up to 5% acetone (see ICSC 0087), resulting in high flammability.
Other UN Classification for technical product: UN hazard class 3, UN pack group II. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xi; R: 36; S: (2)-24/25 

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    See Also:
       Toxicological Abbreviations
       Diacetone alcohol (SIDS)