Synonyms | dl-γ-Tocopherol |
Definition | |
Chemical name | 2,7,8-trimethyl-2-(4′,8′,12′-trimethyltridecyl)-6-chromanol |
Einecs | 231-523-4 |
Chemical formula | C28H48O2 |
Molecular weight | 416,69 |
Assay | Content not less than 97 % |
Description | Clear, viscous, pale yellow oil which oxidises and darkens on exposure to air or light |
Identification | |
A.Spectrometry | Maximum absorptions in absolute ethanol at about 298 nm and 257 nm |
Purity | |
Specific absorption in ethanol | (298 nm) between 91 and 97 |
(257 nm) between 5,0 and 8,0 |
Refractive index | 1,503-1,507 |
Sulphated ash | Not more than 0,1 % |
Arsenic | Not more than 3 mg/kg |
Lead | Not more than 5 mg/kg |
Mercury | Not more than 1 mg/kg |
Heavy metals (as Pb) | Not more than 10 mg/kg |