Main components of emulsifier S-185/O-5?

The main component of emulsifier S-185/O-5 is fatty alcohol polyoxyethylene ether, specifically polyoxyethylene (35) stearyl ether, which is a high-purity nonionic surfactant.

Detailed Description

The full chemical name of emulsifier S-185/O-5 (CAS No.: 68439-49-6) is fatty alcohol polyoxyethylene ether (octadecyl polyoxyethylene ether), which is a nonionic surfactant produced by addition polymerization of natural C16-18 fatty alcohols (mainly stearyl alcohol/octadecanol) with ethylene oxide (EO).

Its general molecular structure is RO(CH₂CH₂O)ₙH, where the hydrophobic group R is a long-chain alkyl of C16-18, the hydrophilic group is a polyoxyethylene chain, the average EO adduct number n≈35, and the molecular weight is about 1800. The active matter content of this product is as high as ≥99%, with free alcohol content ≤1.0% and moisture ≤1.0%. It is a refined grade product with high active matter and low moisture, capable of meeting stringent industrial formulation requirements.

Due to the presence of both a long hydrophobic carbon chain and 35 oxyethylene hydrophilic units in the molecular structure, this product exhibits excellent lipophilicity and hydrophilicity, with an HLB value between 16 and 17. It is readily soluble in water, ethanol, acetone and other organic solvents. The critical micelle concentration (CMC) of micelles formed in water is approximately 10⁻⁵~10⁻⁴ mol/L.

Core Component Technical Parameters

Application Suggestions

Based on the characteristics of its main component, emulsifier S-185/O-5 is suitable for the following fields:

• Pesticide Formulations: As an efficient emulsifying and dispersing agent for emulsifiable concentrates, oil-in-water emulsions, and microemulsions, the recommended dosage is usually 3%-10% of the total formulation.
• Industrial Cleaning: Used in hard surface cleaner formulations, it exhibits excellent emulsifying and stripping capabilities for mineral oils and animal/vegetable oil stains.
• Metalworking Fluids: Used as an emulsifying and lubricating component to help form stable oil-in-water emulsions.
• Textile Dyeing and Finishing: Used in compounding auxiliaries such as scouring agents and leveling agents to promote uniform dye uptake.
• Paints and Inks: Assists in stable dispersion of resins and pigments in the aqueous phase, improving film performance.

Precautions

• This product is an industrial chemical. Wear protective gloves, goggles and protective clothing during operation to avoid skin and eye contact.
• It is hygroscopic. Use promptly after opening, and reseal the remaining material.
• Store at a recommended temperature of 5-40°C, avoid direct sunlight and high temperature heat sources, and keep away from strong oxidizers.
• This product is toxic to aquatic organisms. Do not discharge untreated product directly into water bodies or soil.