Description

sec-Octanethiol is a branched-chain aliphatic thiol, a versatile organosulfur compound widely used as a chemical intermediate and chain transfer agent. Its unique structure provides effective control over polymer molecular weight and properties during synthesis. This product is essential for manufacturers in the polymer, lubricant additive, and specialty chemical industries seeking to modify material characteristics and performance.

Application

• Polymerization Chain Transfer Agent (CTA): A critical component in free-radical polymerization processes (e.g., for styrene, acrylates, vinyl acetate) to control molecular weight and polydispersity, improving polymer processability and final product properties.
• Lubricant and Fuel Additive Precursor: Used in the synthesis of extreme pressure (EP) additives, anti-wear agents, and antioxidants for industrial lubricants and specialty fuels.
• Chemical Intermediate: Serves as a key building block for synthesizing more complex organosulfur compounds, including surfactants, flotation agents, and corrosion inhibitors.
• Surface Modifier and Coupling Agent: Imparts hydrophobic properties to surfaces or acts as a coupling agent in composite materials and coatings.
• Rubber and Elastomer Manufacturing: Employed as a peptizing agent or modifier in the production of synthetic rubbers to regulate viscosity and plasticity.
• Pharmaceutical and Agrochemical Synthesis: Utilized as an intermediate in the synthesis of certain active pharmaceutical ingredients (APIs) and agrochemicals.

Basic Information

Product Name	sec-Octanethiol
CAS No.	25265-79-6
Molecular Formula	C8H18S
Molecular Weight	146.29 g/mol
Synonyms	2-Octanethiol; 1-Methylheptyl mercaptan; (±)-2-Octyl mercaptan; sec-Octyl mercaptan; 2-Mercaptooctane; 2-Octylthiol; Thiosec-octyl alcohol; NSC 9245
EINECS	246-765-6

Quality Control

Our sec-Octanethiol is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flame. Due to its nature as a thiol, it should be kept separate from strong oxidizing agents. For long-term storage, maintaining an inert atmosphere (e.g., nitrogen) is recommended to minimize oxidation. Recommended storage temperature: 2-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Density (20°C)	0.84 - 0.86 g/mL
Refractive Index (n20D)	1.450 - 1.455
Water Content (KF)	≤ 0.1%

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