Description

4-Undecylbenzenesulfonic Acid is a high-purity, long-chain alkylbenzenesulfonic acid derivative, serving as a critical intermediate and functional surfactant. Its value lies in its unique combination of hydrophobic alkyl chain and hydrophilic sulfonic acid group, enabling superior surface activity and chemical reactivity. This compound is essential for manufacturers in the chemical synthesis, detergent, and specialty materials industries seeking to develop high-performance formulations.

Application

• Surfactant Intermediate: A key raw material for synthesizing specialized anionic surfactants and detergents.
• Emulsion Polymerization: Acts as an emulsifier and stabilizer in the production of synthetic rubbers and polymers like SBR and ABS.
• Lubricant & Fuel Additive: Used in formulating additives that improve detergency and anti-wear properties in industrial lubricants and fuels.
• Textile & Leather Processing: Functions as a wetting agent, leveling agent, and dye dispersant in textile auxiliaries and leather chemicals.
• Oilfield Chemicals: Employed in drilling mud formulations and as a component in demulsifiers for crude oil processing.
• Industrial & Institutional (I&I) Cleaning: A building block for heavy-duty industrial cleaners, degreasers, and hard surface cleaners.
• Catalyst & Chemical Synthesis: Serves as an acid catalyst or a sulfonating agent in various organic synthesis reactions.
• Personal Care (Specialty Grades): Used in the manufacture of specific high-foaming, mild surfactants for cosmetic applications.

Basic Information

Product Name	4-Undecylbenzenesulfonic Acid
CAS No.	39156-49-5
Molecular Formula	C17H28O3S
Molecular Weight	312.47 g/mol
Synonyms	p-Undecylbenzenesulfonic Acid; Undecylbenzenesulfonic Acid; 4-n-Undecylbenzenesulfonic Acid; Benzenesulfonic acid, 4-undecyl-; 1-Undecyl-4-sulfobenzene; Linear Undecyl Benzene Sulfonic Acid; LABS derivative (C11); C11 LAS Acid
EINECS	Contact for details

Quality Control

Our 4-Undecylbenzenesulfonic Acid is produced under a stringent quality management system to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including assay, impurity profile, and physical property verification. Certificates of Analysis (COA) documenting purity, sulfonic acid content, and other critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and a strong acid/organic solvent; ensure containers are kept tightly sealed to exclude moisture and stored separately from bases and oxidizing agents.

Specification

Item	Specification
Appearance	Light yellow to amber viscous liquid
Identification (IR)	Conforms to structure
Assay (Sulfonic Acid Content)	≥ 96.0 %
Free Sulfuric Acid	≤ 2.0 %
Unsulfonated Matter	≤ 2.5 %
Water Content	≤ 1.0 %
Color (Hazen)	≤ 200

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