Description

(2S, 4'R, 8'S)-α-Tocopherol CAS NO 79434-83-6 is a specific, naturally-occurring stereoisomer of α-tocopherol, the most biologically active form of Vitamin E. This high-purity compound is critical for applications demanding precise molecular configuration to ensure maximum efficacy and bioavailability. It is an essential ingredient for the pharmaceutical, nutraceutical, and premium food supplement industries, where its potent antioxidant properties are leveraged for stability and health benefits.

Application

• Pharmaceutical Formulations: Used as an active pharmaceutical ingredient (API) in prescription and over-the-counter medications for Vitamin E supplementation and antioxidant therapy.
• Nutraceuticals & Dietary Supplements: A key component in softgel capsules, tablets, and liquid formulations for its superior bioactivity compared to synthetic Vitamin E (all-rac-α-tocopherol).
• Functional Food & Beverage Fortification: Incorporated into health foods, dairy alternatives, and beverages to enhance nutritional value and act as a natural preservative.
• Cosmeceuticals & Skincare: Valued in anti-aging serums, creams, and lotions for its ability to protect skin from oxidative stress and support skin barrier function.
• Animal Feed & Veterinary Products: An essential nutrient in premixes for livestock, poultry, and pet food to support reproduction, immune function, and meat quality.
• Research & Biochemical Reagents: Serves as a standard and reagent in analytical laboratories, clinical research, and studies of lipid peroxidation and oxidative stress.

Basic Information

Product Name	(2S, 4'R, 8'S)-α-Tocopherol
CAS No.	79434-83-6
Molecular Formula	C29H50O2
Molecular Weight	430.71 g/mol
Synonyms	d-α-Tocopherol; RRR-α-Tocopherol; Natural Vitamin E; (R,R,R)-α-Tocopherol; 2,5,7,8-Tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol; Vitamin E (natural form); Tocopherol, α-
EINECS	Contact for details

Quality Control

Our (2S, 4'R, 8'S)-α-Tocopherol is manufactured under strict quality management systems. Each batch is tested to ensure it meets stringent specifications for identity, purity, and stereochemical composition, suitable for pharmaceutical and food-grade applications. Certificates of Analysis (COA) detailing assay, enantiomeric purity, and impurity profiles are available 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. This product is easily oxidized and light-sensitive; prolonged exposure to air, heat, or light should be avoided to maintain potency.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow viscous oil
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 96.0%
Enantiomeric Purity (Chiral HPLC)	≥ 98.0% (2S, 4'R, 8'S) isomer
Specific Rotation [α]20/D	+0.20° to +0.30°
Heavy Metals	≤ 10 ppm

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