Description

Sodium Methyl 2-Sulphooctadecanoate is an anionic surfactant derived from stearic acid, valued for its excellent emulsifying, wetting, and dispersing properties. This compound is particularly significant for its ability to function effectively in challenging formulations, including those with high electrolyte content. It is essential for manufacturers in the personal care, textile processing, and agrochemical industries seeking high-performance, stable ingredients.

Application

• Personal Care & Cosmetics: Acts as a primary emulsifier and surfactant in creams, lotions, and hair care products, providing stable emulsions and a smooth feel.
• Textile Auxiliaries: Used as a wetting agent, penetrant, and emulsifier in textile scouring, dyeing, and finishing processes.
• Agrochemical Formulations: Serves as an effective emulsifier and dispersant in pesticide and herbicide concentrates, enhancing sprayability and plant coverage.
• Industrial Cleaners & Detergents: Functions as a key surfactant in heavy-duty and institutional cleaning products, offering good detergency and stability in hard water.
• Leather Processing: Employed as a fatliquoring agent and emulsifier in leather tanning and finishing to improve softness and quality.
• Metal Working Fluids: Used as an emulsifier in soluble oils and coolants, providing stability and corrosion inhibition.

Basic Information

Product Name	Sodium Methyl 2-Sulphooctadecanoate
CAS No.	4062-78-6
Molecular Formula	C₁₉H₃₇NaO₅S
Molecular Weight	400.55 g/mol
Synonyms	Sodium 2-sulfonatooctadecanoate methyl ester; Methyl 2-sulfonatooctadecanoate sodium salt; Sodium methyl 2-sulfostearate; Sulfonated methyl stearate sodium salt; Stearic acid, 2-sulfo-, methyl ester, sodium salt; Methyl hydrogen octadecylsulfonate sodium salt; Igepon AM-78 (historical trade name)
EINECS	223-761-9

Quality Control

Our Sodium Methyl 2-Sulphooctadecanoate is manufactured under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, composition, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, moisture content, and sulfonate content 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, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and flow properties.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms
Assay (Active Matter)	Min. 90%
Moisture Content	Max. 2.0%
Sodium Sulfate	Max. 5.0%
pH (1% Solution)	7.0 - 9.0

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