2,6-Di-tert-butyl-4-methylphenol
2,6-Di-tert-butyl-p-cresol
BHT
C15H24O / C6H2(OH)(CH3)(C(CH3)3)2
Molecular mass: 220.34
ICSC # 0841
CAS # 128-37-0
RTECS # GO7875000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Confusion.
Dizziness.
Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Rest.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers.
Carefully collect remainder,
then remove to safe place.
Do NOT let this chemical enter the environment.
(Extra personal protection: P2 filter respirator for harmful particles).
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Separated from
strong oxidants,
strong bases.
Well closed.
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Important Data
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Physical State; Appearance:
COLOURLESS TO PALE YELLOW CRYSTALS
OR POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on burning and
on contact with oxidizing materials.
Occupational Exposure Limits:
TLV: Inhalable fraction & vapour 2 mg/m3 A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK: (Inhalable fraction) 20 mg/m3
Peak limitation category: II(2); Carcinogen category: 4; Pregnancy risk group: C;
(DFG 2008).
OSHA PEL: none
NIOSH REL: TWA 10 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX
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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
irritates
the eyes and
the 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.
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Physical
Properties
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Boiling point: 265°C
Melting point: 70°C
Density: 1.03-1.05
g/cm3
Solubility in water, g/100 ml at 25°C: 0.00006
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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
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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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.
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ADDITIONAL INFORMATION
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ICSC: 0841
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BUTYLATED HYDROXYTOLUENE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
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.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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