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BUTYLATED HYDROXYTOLUENE
ICSC: 0841
Peer-Review Status: 24.03.1999 Validated
2,6-Di-tert-butyl-4-methylphenol
2,6-Di-tert-butyl-p-cresol
BHT 
CAS #: 128-37-0 RTECS #: GO7875000
EINECS #: 204-881-4
 		    Formula: C15H24O / C6H2(OH)(CH3)(C(CH3)3)2
Molecular mass: 220.34

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use water spray, powder, foam, carbon dioxide. 
EXPLOSION     In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Confusion. Dizziness. Nausea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Rest. Refer for medical attention . 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles.   
EC Classification
 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants and strong bases. Well closed. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-PALE-YELLOW CRYSTALS OR POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on burning. Decomposes on contact with oxidizing materials. 

Occupational exposure limits
TLV (inhalable vapor and aerosol): 2mg/m³ as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK (inhalable fraction): 20 mg/m³; Carcinogen category: 4; Peak limitation category: II(2); Pregnancy risk group: C; (DFG 2008). 

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

Inhalation risk
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C. 

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

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the liver. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 265°C
Melting point: 70°C
Density: 1.03-1.05 g/cm³
Solubility in water, g/100ml at 25°C: 0.00006
Vapour pressure, Pa at 20°C: 1.3
Relative vapour density (air = 1): 7.6
Flash point: 127°C c.c.
Octanol/water partition coefficient as log Pow: 5.1   		The substance is harmful to aquatic organisms. 

NOTES
Ionol, Antioxidant 4K, Paranox 441, Sustane BHT, Topanol-o-, Tenox BHT, Impruvol, Vulkanox KB are trade names.
Card has been partially updated in November 2008: see Occupational Exposure Limits. 

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
       Butylated hydroxytoluene (FAO Nutrition Meetings Report Series 38a)
       Butylated hydroxytoluene (FAO Nutrition Meetings Report Series 40abc)
       Butylated hydroxytoluene (WHO Food Additives Series 5)
       Butylated hydroxytoluene (WHO Food Additives Series 10)
       Butylated hydroxytoluene (WHO Food Additives Series 21)
       Butylated hydroxytoluene (WHO Food Additives Series 35)
       BUTYLATED HYDROXYTOLUENE (JECFA Evaluation)