Description

Methyldioctadecylsulphonium Methyl Sulphate is a high-purity quaternary ammonium salt derivative, valued for its role as a versatile phase transfer catalyst and cationic surfactant. Its unique structure provides excellent efficacy in facilitating reactions between immiscible phases, making it a critical component in specialized synthesis. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and advanced materials sectors seeking to optimize process yields and product purity.

Application

• Phase Transfer Catalyst (PTC): Crucial for accelerating reactions between organic and aqueous phases in the synthesis of complex organic molecules, pharmaceuticals, and fine chemicals.
• Cationic Surfactant: Used in the formulation of fabric softeners, hair conditioners, and other personal care products where substantive conditioning is required.
• Pharmaceutical Intermediates: Employed in the synthesis of active pharmaceutical ingredients (APIs) requiring quaternary ammonium functionalities.
• Agrochemical Synthesis: Facilitates the production of certain herbicides, pesticides, and plant growth regulators.
• Polymerization Aid: Acts as an emulsifier or catalyst in specific emulsion and suspension polymerization processes.
• Material Science: Used in the surface modification of nanoparticles and the creation of organoclays for composite materials.
• Textile Auxiliary: Imparts antistatic and softening properties to synthetic and natural fibers.

Basic Information

Item	Details
Product Name	Methyldioctadecylsulphonium Methyl Sulphate
CAS No.	28997-77-5
Molecular Formula	C39H81O4S2+ • CH3SO4-
Molecular Weight	694.18 g/mol (for the cation C39H81OS+)
Synonyms	Dioctadecylmethylsulfonium Methyl Sulfate; Dimethyl Dioctadecyl Sulfonium Methyl Sulfate; Dioctadecylmethylsulfonium Methosulfate; DODMS; Methylbis(octadecyl)sulfonium Methyl Sulfate; Arquad 2HT-75 (related trade name for chloride form); Distearylmethylsulfonium Methyl Sulfate
EINECS	Contact for details

Quality Control

Our Methyldioctadecylsulphonium Methyl Sulphate is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing key parameters such as assay, moisture content, and residual solvents is provided with every shipment to guarantee it meets your specific application requirements.

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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	White to off-white powder or waxy solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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