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1,3-DIMETHYLUREA
ICSC: 1745
Peer-Review Status: 24.11.2009 Validated
N,N'-Dimethylurea
sym-Dimethylurea
N,N'-Dimethylharnstoff 
CAS #: 96-31-1 RTECS #: YS9868000
EINECS #: 202-498-7
    Formula: (CH3NH)2CO/C3H8N20
Molecular mass: 88.1

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use carbon dioxide, water spray. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.     
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough.  Use local exhaust.  Fresh air, rest. 
Skin Redness.  Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety goggles.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.   
EC Classification
 
UN Classification
 
GHS Classification
Signal: Warning
Causes mild skin irritation
Causes eye irritation 

EMERGENCY RESPONSE SAFE STORAGE
   

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-WHITE CRYSTALLINE POWDER. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Decomposes on heating. This produces nitrogen oxides. The solution in water is a weak base. Reacts with strong reducing agents. This generates fire hazard. 

Occupational exposure limits
TLV not established.
MAK (not established):. 

Routes of exposure
 

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 short-term exposure
The substance is mildly irritating to the eyes and skin. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 268-270°C
Melting point: 102-107°C
Density: 1.1 g/cm³
Solubility in water, g/100ml at 21.5°C: 76.5 (good)
Vapour pressure, Pa at 20°C: 0.042
Flash point: 154°C
Auto-ignition temperature: 400°C
Octanol/water partition coefficient as log Pow: -0.78  
 

NOTES
 

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
       1,3-dimethylurea (SIDS)