Description

3-(Dimethyloctadecylammonio)Propanesulfonate is a high-purity zwitterionic surfactant, also known as a sulfobetaine, characterized by its unique combination of a long hydrophobic alkyl chain and a hydrophilic sulfonate group. This structure provides excellent surface activity, stability across a wide pH range, and compatibility with other ionic species, making it a valuable component in demanding formulations. It is primarily utilized by manufacturers in the personal care, pharmaceutical, and advanced materials sectors who require mild, high-performance surfactants for stabilization, emulsification, and viscosity modification.

Application

• Personal Care & Cosmetics: Key ingredient in mild shampoos, body washes, and facial cleansers due to its zwitterionic nature, which is gentle on skin and eyes while providing rich foam and conditioning benefits.
• Pharmaceutical Formulations: Used as an excipient in drug delivery systems, including liposomes and micelles, to enhance solubility and stability of active pharmaceutical ingredients (APIs).
• Biotechnology & Protein Research: Employed as a mild detergent in cell lysis buffers and for solubilizing membrane proteins without denaturing their native structure.
• Enhanced Oil Recovery (EOR): Acts as a surfactant in chemical flooding processes to reduce interfacial tension between oil and water, improving oil displacement efficiency.
• Industrial & Institutional Cleaners: Provides effective cleaning and wetting in hard surface cleaners and industrial degreasers, offering stability in electrolyte-rich environments.
• Coatings & Inks: Functions as a dispersant and wetting agent in pigment preparations and coating formulations to improve color development and application properties.

Basic Information

Product Name	3-(Dimethyloctadecylammonio)Propanesulfonate
CAS No.	90459-46-4
Molecular Formula	C₂₃H₄₉NO₃S
Molecular Weight	419.71 g/mol
Synonyms	N,N-Dimethyl-N-octadecyl-3-ammonio-1-propanesulfonate; Octadecyldimethyl(3-sulfopropyl)ammonium hydroxide, inner salt; Stearyl sulfobetaine; SB-18; Sulfobetaine 18; 3-(Octadecyldimethylammonio)propanesulfonate; 1-Octadecanaminium, N,N-dimethyl-N-(3-sulfopropyl)-, inner salt
EINECS	Contact for details

Quality Control

Our 3-(Dimethyloctadecylammonio)Propanesulfonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, moisture content, and residual solvents are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed after each use to prevent absorption of atmospheric moisture, which may affect product quality.

Specification

Item	Specification
Appearance	White to off-white powder or waxy solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Residue on Ignition (Sulfated Ash)	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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