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Butylated hydroxyanisole

Butylated hydroxyanisole
IUPAC name 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole (mixture)
CAS number 25013-16-5
Molecular formula C11H16O2
Molar mass 180.24 g/mol
Appearance waxy solid
Melting point

48-55 °C

Boiling point

264-270 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Butylated hydroxyanisole (BHA) is a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole. It is prepared from 4-methoxyphenol and isobutylene. It is a waxy solid that exhibits antioxidant properties.

Additional recommended knowledge

Like butylated hydroxytoluene (BHT), the conjugated aromatic ring of BHA is able to stabilize free radicals, sequestering them. By acting as free radical scavengers, further free radical reactions are prevented.

The National Institutes of Health considers BHA reasonably anticipated to be a human carcinogen.[1]

See also


  • Why are BHA and BHT in foods? Are they safe?
  1. ^ Substance Profiles: Butylated Hydroxyanisole. Report on Carcinogens, Eleventh Edition. National Toxicology Program.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Butylated_hydroxyanisole". A list of authors is available in Wikipedia.
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