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2,4-PENTADIONEICSC: 0533
August 1997
CAS #: 123-54-6Acetyl 2-propanone
Acetoacetone
Acetyl acetone
Pentane-2,4-dione
UN #: 2310
EINECS #: 204-634-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable.  Above 34°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking.  Above 34°C use a closed system, ventilation and explosion-proof electrical equipment.  Use powder, foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Incoordination. Dizziness. Drowsiness. Headache. Laboured breathing. Nausea. Vomiting. Ataxia  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles or face shield.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Diarrhoea. Weakness. Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Ventilation. Collect leaking liquid in sealable containers. Wash away remainder with plenty of water. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 3; UN Subsidiary Risks: 6.1; UN Pack Group: III 

STORAGE
Fireproof. Separated from strong oxidants. Keep in the dark. 
PACKAGING
 
2,4-PENTADIONE ICSC: 0533
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air. 

Chemical dangers
The substance may polymerize under the influence of light. Reacts with strong oxidants, bases and reducing agents. 

Formula: C5H8O2 / CH3COCH2COCH3
Molecular mass: 100.13
Boiling point: 140°C
Melting point: -23°C
Relative density (water = 1): 0.98
Solubility in water, g/100ml: 16
Vapour pressure, kPa at 20°C: 0.93
Relative vapour density (air = 1): 3.45
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02
Flash point: 34°C c.c.
Auto-ignition temperature: 340°C
Explosive limits, vol% in air: 2.4-11.6 


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. The substance may cause effects on the nervous system. This may result in tissue lesions. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the thymus, lungs, central nervous system and nasal passage. 


Occupational exposure limits
TLV: 25 ppm as TWA; (skin).
MAK: 83 mg/m3, 20 ppm; peak limitation category: II(2); skin absorption (H); pregnancy risk group: C 

ENVIRONMENT
The substance is harmful to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 10-22; S: (2)-21-23-24/25 

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    See Also:
       Toxicological Abbreviations