Description

Octadecyl [[(4-Hydroxy-3,5-Dimethylphenyl)Methyl]Thio]Acetate is a synthetic phenolic antioxidant ester, valued for its ability to inhibit oxidative degradation in various organic matrices. This compound matters for industrial formulators seeking to enhance the shelf-life and thermal stability of their products under demanding conditions. It is primarily needed by manufacturers in the polymer, lubricant, and specialty chemical industries where long-term performance and material integrity are critical.

Application

• Primary antioxidant and stabilizer in polyolefins (e.g., polyethylene, polypropylene) to prevent thermal and oxidative degradation during processing and end-use.
• Additive in industrial lubricants and greases to extend service life by preventing oil oxidation and sludge formation.
• Stabilizing component in adhesives, sealants, and elastomers to maintain flexibility and performance properties.
• Protective agent in petroleum-derived products such as fuels and transformer oils to improve oxidative stability.
• Intermediate in the synthesis of more complex polymer additives and specialty chemicals.
• Potential use as a stabilizer in cosmetic and personal care formulations where oxidative rancidity is a concern.

Basic Information

Product Name	Octadecyl [[(4-Hydroxy-3,5-Dimethylphenyl)Methyl]Thio]Acetate
CAS No.	16545-53-2
Molecular Formula	C29H52O3S
Molecular Weight	480.79 g/mol
Synonyms	Octadecyl (3,5-dimethyl-4-hydroxybenzylthio)acetate; Thioctic Acid, Octadecyl Ester, (4-Hydroxy-3,5-dimethylphenyl)methyl Derivative; Antioxidant 16545-53-2; Phenolic Thioether Antioxidant; 2-(Octadecylthio)acetic Acid 3,5-Dimethyl-4-hydroxybenzyl Ester; C18 Thio Antioxidant Ester
EINECS	Contact for details

Quality Control

Our production of Octadecyl [[(4-Hydroxy-3,5-Dimethylphenyl)Methyl]Thio]Acetate adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The product is manufactured in facilities that follow cGMP guidelines where applicable. Comprehensive analytical testing, including HPLC, GC, and NMR, is performed to verify identity, potency, and impurity profiles. A Certificate of Analysis (COA) detailing all specification results is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. The material is light-sensitive and should be handled and stored accordingly to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	48 - 52 °C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

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