Vitamin E

CAS 59-02-9C29H50O2430.7 g/mol

(R,R,R)-alpha-tocopherol is an alpha-tocopherol that has R,R,R configuration. The naturally occurring stereoisomer of alpha-tocopherol, it is found particularly in sunflower and olive oils. It has a role as an antioxidant, an antiviral agent, a micronutrient, an EC 2.7.11.13 (protein kinase C) inhibitor, an anticoagulant, a nutraceutical, an immunomodulator, an antiatherogenic agent, a plant metabolite and an algal metabolite. It is an enantiomer of a (S,S,S)-alpha-tocopherol.

IUPAC: (2R)-2,5,7,8-tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-3,4-dihydrochromen-6-ol

PubChem

Physical & Chemical Properties

Physical and chemical properties
Melting Point	3 °C
Boiling Point	BP: 210 °C at 0.1 mm Hg
Density	0.950 g/cu cm at 25 de C
Solubility	Insoluble in water, but water-dispersible.
Vapor Pressure	0.00000001 [mmHg]
Appearance	Slightly yellow to amber, nearly odourless, clear, viscous oil which oxidises and darkens on exposure to air or light

Data: PubChem · Last updated: 4/20/2026