Description

2-Hexadecyl-5-Methylhydroquinone CAS NO 21182-65-0 is a high-purity, long-chain alkylated hydroquinone derivative. This compound serves as a versatile intermediate and a specialized antioxidant, offering enhanced lipophilicity and stability for demanding formulations. It is essential for manufacturers in the polymer, specialty chemical, and advanced material sectors seeking to improve product longevity and performance under oxidative stress.

Application

• Polymer Stabilizer: Acts as an effective antioxidant and light stabilizer in plastics, synthetic rubbers, and elastomers to prevent thermal and oxidative degradation.
• Lubricant & Fuel Additive: Used as an antioxidant additive in industrial lubricants, greases, and fuels to inhibit gum formation and extend service life.
• Cosmetic & Personal Care: Serves as a stabilizing agent in formulations containing unsaturated oils and butters to prevent rancidity and color change.
• Specialty Chemical Intermediate: A key building block for synthesizing more complex antioxidants, UV absorbers, and other functional additives.
• Adhesive & Sealant Formulations: Enhances the shelf-life and performance stability of polyurethane and other adhesive systems susceptible to oxidation.
• Research & Development: Utilized in academic and industrial R&D for studying antioxidant mechanisms and developing new stabilized material systems.

Basic Information

Product Name	2-Hexadecyl-5-Methylhydroquinone
CAS No.	21182-65-0
Molecular Formula	C23H40O2
Molecular Weight	348.57 g/mol
Synonyms	2-Cetyl-5-Methylhydroquinone; 2-Hexadecyl-5-Methyl-1,4-Benzenediol; 5-Methyl-2-hexadecylhydroquinone; 1,4-Benzenediol, 2-hexadecyl-5-methyl-; 2-(Hexadecyl)-5-methylbenzene-1,4-diol; Cetyl Methyl Hydroquinone; Long-chain alkylated hydroquinone
EINECS	Contact for details

Quality Control

Our 2-Hexadecyl-5-Methylhydroquinone is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications and is free from unintended impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. For long-term storage, consider using an inert atmosphere to prevent oxidation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.