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1,3-DIMETHYLUREAICSC: 1745
N,N'-Dimethylurea
sym-Dimethylurea
N,N'-Dimethylharnstoff
November 2009
CAS #: 96-31-1
EC Number: 202-498-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  Finely dispersed particles form explosive mixtures in air.  NO open flames.    Use carbon dioxide, water spray.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS PREVENTION FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

WARNING
Causes mild skin irritation
Causes eye irritation 

Transportation
UN Classification
 

STORAGE
 
PACKAGING
 
1,3-DIMETHYLUREA ICSC: 1745
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: (CH3NH)2CO/C3H8N20
Molecular mass: 88.1
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  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
 

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

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
       1,3-dimethylurea (SIDS)