Description

p-Toluenesulfonic Acid n-Octadecyl Ester is a high-purity, long-chain alkyl ester derivative of p-toluenesulfonic acid, serving as a versatile intermediate and functional additive. This compound is valued for its surfactant properties and its role as a phase-transfer catalyst in specialized organic synthesis. It is primarily needed by manufacturers in the chemical, polymer, and specialty materials industries for applications requiring hydrophobic modification or catalytic activity.

Application

• As a phase-transfer catalyst in organic synthesis reactions, particularly where ionic reagents must be transferred into organic phases.
• As a surfactant or emulsifier in the formulation of specialty coatings, inks, and polymer dispersions.
• As a hydrophobic modifying agent for surface treatments and in the production of specialty polymers and resins.
• As an intermediate in the synthesis of more complex sulfonate esters and other fine chemicals.
• In research and development for novel material science applications, including liquid crystals and self-assembled monolayers.

Basic Information

Product Name	p-Toluenesulfonic Acid n-Octadecyl Ester
CAS No.	3386-32-1
Molecular Formula	C25H44O3S
Molecular Weight	424.68 g/mol
Synonyms	Octadecyl p-toluenesulfonate; Stearyl p-toluenesulfonate; n-Octadecyl tosylate; 4-Methylbenzenesulfonic acid octadecyl ester; p-Toluenesulfonic acid stearyl ester; Tosic acid octadecyl ester; 1-Octadecanol, 4-methylbenzenesulfonate
EINECS	222-205-6

Quality Control

Our p-Toluenesulfonic Acid n-Octadecyl Ester is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is available for every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and heat sources.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%

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