| Synonyms | BHA |
| Definition | |
| Chemical names | 3-Tertiary-butyl-4-hydroxyanisole |
| A mixture of 2-tertiary-butyl-4-hydroxyanisole and 3-tertiary-butyl-4-hydroxyanisole |
| Einecs | 246-563-8 |
| Chemical formula | C11H16O2 |
| Formula weight | 180,25 |
| Assay | Content not less than 98,5 % of C11H16O2 and not less than 85 % of 3-tertiary-butyl-4-hydroxyanisole isomer |
| Description | White or slightly yellow crystals or waxy solid with a slight aromatic smell |
| Identification | |
A. Solubility | Insoluble in water, freely soluble in ethanol |
B. Melting range | Between 48 °C and 63 °C |
C. Colour reaction | Passes test for phenol groups |
| Purity | |
| Sulphated ash | Not more than 0,05 % after calcination at 800 ± 25 °C |
| Phenolic impurities | Not more than 0,5 % |
Specific absorption  |  (290 nm) not less than 190 and not more than 210 |
Specific absorption  |  (228 nm) not less than 326 and not more than 345 |
| Arsenic | Not more than 3 mg/kg |
| Lead | Not more than 5 mg/kg |
| Mercury | Not more than 1 mg/kg |
