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3-PENTANONE
ICSC: 0874
Peer-Review Status: 28.03.1996 Validated
Diethyl ketone
Dimethylacetone
Methacetone 
CAS #: 96-22-0 RTECS #: SA8050000
UN #: 1156
EC #: 606-006-00-5
EINECS #: 202-490-3
    Formula: C5H10O / CH3CH2COCH2CH3
Molecular mass: 86.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable.  NO open flames, NO sparks and NO smoking.  Use alcohol-resistant foam, powder, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
Inhalation Cough. Shortness of breath.  Use ventilation.  Fresh air, rest. Refer for medical attention. 
Skin Dry skin. Redness.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness.  Wear safety spectacles.  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. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Collect leaking and spilled liquid in sealable metal (mild steel) containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.   
EC Classification
Symbol: F, Xi; R: 11-37-66-67; S: (2)-9-16-25-33 
UN Classification
UN Hazard Class: 3; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30G30.
NFPA Code: H1; F3; R0. 
Fireproof. Separated from oxidants. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. The vapour mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
Reacts violently with oxidants. This generates fire and explosion hazard. Attacks many plastics. 

Occupational exposure limits
TLV: 200 ppm as TWA; 300 ppm as STEL; (ACGIH 2008). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour. 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. 

Effects of long-term or repeated exposure
The liquid defats the skin. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 102°C
Melting point: -42°C
Relative density (water = 1): 0.81 (25°C)
Solubility in water: moderate
Vapour pressure, kPa at 20°C: 2.0
Relative vapour density (air = 1): 3.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 13°C o.c.
Auto-ignition temperature: 452°C
Explosive limits, vol% in air: 1.6-3
Octanol/water partition coefficient as log Pow: 0.99 (estimated) 
 

NOTES
Card has been partially updated in November 200: see Occupational Exposure Limits, Fire fighting, Packaging and Labelling, EU Classification. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations