What are the main characteristics of Emulsifier S-185/O-5?

Emulsifier S-185/O-5 is a nonionic surfactant with a high HLB value (16-17). Its core characteristics include strong emulsifying power, resistance to acid, alkali, and hard water, and high active content (≥99%), which can significantly enhance the stability of multiphase systems.

Detailed Description

Emulsifier S-185/O-5, chemically named fatty alcohol polyoxyethylene ether (steareth-35), appears as a white to light yellow paste. With its high ethylene oxide addition number (n≈35), the product achieves an HLB value of 16-17, which endows it with excellent O/W emulsifying, wetting, dispersing, and solubilizing abilities. It effectively reduces interfacial tension, ensuring the oil phase is uniformly dispersed in the water phase in industries such as pesticide formulations, metalworking fluids, and coatings, thereby maintaining long-term formulation stability.

Another outstanding feature of this product is excellent chemical tolerance and broad compatibility. It exhibits good resistance to acid, alkali, and hard water, and is not prone to precipitation or failure in complex industrial environments. Moreover, as a nonionic surfactant, it is well compatible with anionic, cationic, and other nonionic surfactants, giving formulators great flexibility in designing composite systems to meet various complex formulation needs.

In terms of product quality, Emulsifier S-185/O-5 has the significant advantages of high active content (≥99%) and low moisture (≤1.0%). High purity means fewer inactive impurities, meeting the stringent formulation requirements of demanding industrial scenarios. Additionally, its cloud point exceeds 100°C, enabling it to maintain stable emulsifying performance in high-temperature aqueous systems without rapid failure due to temperature rise.

Technical Parameters

Application Recommendations

Based on its high emulsifying power and chemical stability, it is recommended to apply Emulsifier S-185/O-5 primarily in the following areas:

• Pesticide Formulations: Particularly suitable for formulating high-concentration emulsifiable concentrates (EC), emulsions in water (EW), and microemulsions (ME), ensuring rapid self-emulsification upon dilution and enhancing efficacy.
• Industrial Hard Surface Cleaning: Leveraging its efficient emulsification and stripping ability for mineral oils and animal/vegetable oils, it significantly improves the degreasing effect of heavy-duty cleaners.
• Metalworking Fluids: As a basic emulsifying component, it provides extreme pressure lubrication and rust prevention for cutting and grinding fluids, with stable emulsions even in hard water conditions.
• Textile, Dyeing, and Leather Auxiliaries: Used as a degreasing and dispersing component in scouring agents, leveling agents, and leather degreasers; its low-foam characteristics also help reduce foam issues during production.

Precautions

• Safety Protection: Wear protective gloves and goggles during operation to avoid direct skin and eye contact. The product is harmful if swallowed and may irritate the respiratory tract; use in a well-ventilated area.
• Storage Requirements: Store sealed in a cool, dry warehouse at 5–40°C, away from direct sunlight and strong oxidizing agents. The product has a melting point of about 30-35°C and may solidify at low temperatures; thawing with gentle heating before use will not affect performance.
• Environmental Release: Toxic to aquatic life with long-lasting effects; do not discharge waste liquid directly into water bodies or soil. Dispose of properly in accordance with local regulations.