Description

tert-Undecyl Mercaptan is a high-purity, branched-chain alkyl mercaptan (thiol) primarily used as a chain transfer agent and polymerization modifier. Its unique structure provides excellent control over molecular weight and polymer architecture, making it a critical component in the synthesis of specialty polymers and synthetic rubbers. This product is essential for manufacturers in the polymer, elastomer, and specialty chemical industries seeking to fine-tune material properties such as viscosity, tensile strength, and processability.

Application

• Chain Transfer Agent (CTA) in Polymerization: Crucial for controlling molecular weight and polydispersity in free-radical polymerizations of styrene, acrylates, methacrylates, and vinyl acetate.
• Synthetic Rubber Production: Used as a molecular weight regulator and modifier in the manufacture of styrene-butadiene rubber (SBR), nitrile rubber (NBR), and polybutadiene rubber (PBR).
• Polymer Modification: Imparts specific end-group functionality to polymers, enabling further chemical reactions for creating block copolymers or graft polymers.
• Lubricant and Fuel Additive Intermediate: Serves as a key precursor in the synthesis of extreme pressure (EP) additives and anti-wear agents for advanced lubricants.
• Pharmaceutical and Agrochemical Intermediates: Acts as a building block for introducing the tert-undecylthio moiety into more complex molecules.
• Surface Active Agent Synthesis: Used in the production of specialty surfactants and flotation agents for mineral processing.

Basic Information

Product Name	tert-Undecyl Mercaptan
CAS No.	25360-12-7
Molecular Formula	C11H24S
Molecular Weight	188.37 g/mol
Synonyms	tert-Undecylthiol; 2,2-Dimethylnonane-1-thiol; 1-Undecanethiol, 2,2-dimethyl-; tert-Undecyl mercaptan; 2,2-Dimethyl-1-undecanethiol; 1-Undecanethiol, 2,2-dimethyl-; TUM; tert-C11 Mercaptan; 2,2-Dimethylundecyl mercaptan
EINECS	246-888-5

Quality Control

Our tert-Undecyl Mercaptan is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and assay, to ensure it meets stringent specifications for use in sensitive polymerization processes. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee batch-to-batch consistency and traceability.

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 strong acid/organic solvent and being easily oxidized, it is recommended to store under an inert atmosphere (e.g., nitrogen) to maintain product integrity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0 %
Purity (GC Area %)	≥ 99.0 %
Water Content (KF)	≤ 0.1 %
Refractive Index (n20D)	1.458 - 1.462
Density (20°C)	0.84 - 0.86 g/mL

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