Butylated hydroxyanisole
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This article is about BHA the food additive. For other meanings of BHA see BHA (disambiguation)
| Butylated hydroxyanisole | |
|---|---|
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| General | |
| Systematic name | 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole |
| Other names | BHA |
| Molecular formula | C11H16O2 |
| SMILES | ? |
| Molar mass | 180.24 g/mol |
| Appearance | waxy solid |
| CAS number | [25013-16-5] |
| Properties | |
| Density and phase | ? g/cm³, ? |
| Solubility in water | ? g/100 ml (? °C) |
| Melting point | 48-55 °C (? K) |
| Boiling point | 264-270 °C (? K) |
| Acidity (pKa) | ? |
| Basicity (pKb) | ? |
| Viscosity | ? cP at ? °C |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | ? |
| NFPA 704 | |
| Flash point | ? °C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Related compounds | |
| Related compounds | Butylated hydroxytoluene |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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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.
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.
Evidence that BHA is a carcinogen has been obtained from animal trials.
[edit] See also
- Butylated hydroxytoluene (BHT)
[edit] References
- Report on Carcinogens, eleventh edition; National Toxicology Program.
- Why are BHA and BHT in foods? Are they safe?
[edit] External links
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