Description

(2S, 4'S, 8'R)-α-Tocopherol is a specific, naturally-occurring stereoisomer of vitamin E, distinguished by its high biological activity. This compound is critical for its potent antioxidant properties, protecting lipids and other cellular components from oxidative degradation. It is an essential ingredient for manufacturers in the pharmaceutical, nutraceutical, and premium food supplement industries seeking a high-purity, bioavailable form of vitamin E.

Application

• Pharmaceutical Formulations: Used as an active pharmaceutical ingredient (API) in prescription and over-the-counter products for vitamin E supplementation.
• Nutraceuticals & Dietary Supplements: A key component in softgel capsules, tablets, and liquid formulations for antioxidant support.
• Premium Cosmetic & Skincare Products: Incorporated into anti-aging creams, serums, and lotions for its skin-protective and stabilizing effects.
• Functional Food & Beverage Fortification: Used to enrich foods and drinks where the natural stereochemistry and high purity are required.
• Animal Nutrition: Applied in high-performance feed for livestock and pets to support immune function and product quality.
• Research & Biochemical Reagents: Serves as a reference standard and critical reagent in life science research.

Basic Information

Product Name	(2S, 4'S, 8'R)-α-Tocopherol
CAS No.	79434-82-5
Molecular Formula	C29H50O2
Molecular Weight	430.71 g/mol
Synonyms	d-α-Tocopherol; (2R,4'R,8'R)-α-Tocopherol; RRR-α-Tocopherol; Natural Vitamin E; 2,5,7,8-Tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol; Vitamin E (natural form); (R,R,R)-α-Tocopherol; EINECS 279-418-0
EINECS	279-418-0

Quality Control

Our (2S, 4'S, 8'R)-α-Tocopherol is produced and tested to meet stringent quality standards appropriate for pharmaceutical and nutraceutical applications. We ensure compliance with relevant pharmacopoeial monographs (e.g., USP, Ph. Eur.) where specified. Certificates of Analysis (COA) documenting identity, purity, stereochemical composition, and impurity profiles are available for every batch upon request.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen) in a cool, dry place at 2-8°C for long-term stability. Allow the product to reach room temperature before opening to prevent condensation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow viscous oil
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	≥ 96.0% (as total tocopherols, on anhydrous basis)
Enantiomeric Purity (Chiral HPLC)	≥ 98.0% RRR-α-Tocopherol
Specific Rotation [α]20/D	+0.20° to +0.30° (in ethanol)
Heavy Metals	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.