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METRIBUZINICSC: 0516
4-Amino-6-tert-butyl-3-methylthio-as-triazin-5-one
4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
March 1998
CAS #: 21087-64-9
UN #: 3077
EC Number: 244-209-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    Use water spray, powder.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation   Use ventilation (not if powder), local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes   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. Wash hands before eating.  Rinse mouth. Rest. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 9; UN Pack Group: III 

STORAGE
Store in an area without drain or sewer access. 
PACKAGING
 
METRIBUZIN ICSC: 0516
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-WHITE CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on burning. This produces toxic fumes including nitrogen oxides and sulfur oxides. 

Formula: C8H14N4OS
Molecular mass: 214.3
Melting point: 125°C
Density: 1.28 g/cm³
Solubility in water, g/100ml at 0.12°C:
Vapour pressure, Pa at 20°C: <1
Octanol/water partition coefficient as log Pow: 1.6  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Effects of short-term exposure
Exposure at high levels could cause depression of the central nervous system. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 mg/m3, as TWA; A4 (not classifiable as a human carcinogen) 

ENVIRONMENT
The substance is harmful to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn, N; R: 22-50/53; S: (2)-60-61 

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    See Also:
       Toxicological Abbreviations