International Chemical Safety Cards BUTYLATED HYDROXYTOLUENE ICSC: 0841 BUTYLATED HYDROXYTOLUENE 2,6-Di-tert-butyl-4-methylphenol 2,6-Di-tert-butyl-p-cresol butylated hydroxytoluene BHT C15H24O/C6H2(OH)(CH3)(C(CH3)3)2 Molecular mass: 220.34 CAS # 128-37-0 RTECS # GO7875000 ICSC # 0841 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION In case of fire: keep drums, etc., cool by spraying with water.   EXPOSURE PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN! INHALATION Cough. Sore throat. Local exhaust or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention. SKIN MAY BE ABSORBED! Redness. Pain. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. EYES Redness. Pain. Safety goggles, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor. INGESTION Abdominal pain. Diarrhoea. Dizziness. Headache. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place (extra personal protection: P2 filter respirator for harmful particles). Separated from strong oxidants, strong bases. Tightly closed. Cool. Dry. SEE IMPORTANT INFORMATION ON BACK ICSC: 0841 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards BUTYLATED HYDROXYTOLUENE ICSC: 0841 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO PALE YELLOW CRYSTALS OR POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating and on contact with oxidizing materials. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV: ppm; 10 mg/m3 (ACGIH 1992-1993). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. INHALATION RISK: No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. Inhalation of dust or vapour may cause asthmatic reactions (see Notes). Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. PHYSICAL PROPERTIES Boiling point: 265°C Melting point: 70°C Relative density (water = 1): 1.05 Solubility in water: none Relative vapour density (air = 1): 7.6 Flash point: 127°C (c.c.)°C

ENVIRONMENTAL DATA
NOTES
Anyone who has shown symptoms of asthma due to this substance should never again come into contact with this substance. Ionol, Antioxidant 4K, Topanol-o-, Tenox, Impruvol are trade names.

ADDITIONAL INFORMATION
ICSC: 0841 BUTYLATED HYDROXYTOLUENE © IPCS, CEC, 1993

IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.