Vitamin E is a fat-soluble vitamin in 8 forms and is an important antioxidant . Vitamin E includes tocopherol and tocotrienol, a total of 8 compounds, namely α, β, γ, δ tocopherol and α, β, γ, δ tocopherol, α-tocopherol is the most widely distributed in nature The richest and most active form of vitamin E.
When R 1 =CH 3 , R 2 =CH 3 , R 3 =CH 3 :
When R 1 =CH 3 , R 2 =H, R 3 =CH 3 :
When R 1 =H, R 2 =CH 3 , R 3 =CH 3 :
When R 1 =H, R 2 =H, R 3 =CH 3 :
Physical and chemical properties
Vitamin E has an anti-oxidant effect. It is stable to acid and heat, and unstable to alkali . It will accelerate its oxidation under the conditions of iron salt , lead salt or oil rancidity .
The activity of tocotrienol is certain when the substituents are different, but the activity of tocopherol will be significantly reduced.
a | b | c | d | |
Activity ratio | 100 | 40 | 10 | 1 |
Account not verified