Span 80 #CAS1338-43-8

Span 80 #CAS1338-43-8

Sorbitan monooleate (Span 80, SP80M) is a nonionic surfactant belonging to the sorbitan ester family. It is lipophilic and insoluble in water, but can disperse in water to form emulsions, and it is soluble in mineral oil, vegetable oil, hydrocarbon solvents and most organic oily media. It has excellent emulsifying, dispersing, wetting and anti-rust properties. It exhibits good stability under neutral and weakly acidic conditions. Under strong alkaline conditions, saponification reaction will occur, which breaks the ester bond and decomposes the product into sorbitol and oleic acid. Long-term high-temperature heating will accelerate its oxidation and decomposition, resulting in deepening of color and deterioration of emulsifying performance. It has good compatibility with most nonionic, anionic and cationic surfactants, and can be compounded with other emulsifiers to form stable water-in-oil emulsion systems. It has low volatility and certain lubricating performance. It will not undergo violent chemical reactions under normal storage and application conditions. It is prone to oxidative rancidity when exposed to air for a long time, especially in high-temperature and light environments.

Applicaion of Span 80

Sorbitan monooleate (Span 80, SP80M) is a classic lipophilic nonionic emulsifier with low HLB value, widely used to form water-in-oil emulsion systems. It is commonly compounded with hydrophilic emulsifiers such as Tween series to flexibly adjust the HLB value of the whole formula and prepare stable emulsions for different application scenarios. In the food industry, it serves as food-grade emulsifier and stabilizer in bakery products, cream, shortening and chocolate to improve the dispersion of oil phase and prevent stratification. In cosmetic and personal care industry, it is added into water-in-oil cream, ointment, lipstick, sunscreen and massage oil, helping to form stable emulsion, improving spreadability on skin and bringing mild conditioning effect. In the chemical industry, it is an indispensable emulsifier, dispersant and anti-rust additive for oil-based cutting fluid, metal working fluid, anti-rust oil and hydraulic oil, reducing surface tension, promoting uniform dispersion of additives and providing temporary anti-corrosion protection for metal workpieces. It is extensively applied in textile industry as fiber lubricant, antistatic agent and spinning auxiliary, lowering friction coefficient between fibers, reducing static accumulation and improving the smoothness of spinning and weaving process. In pesticide field, it acts as emulsifier and dispersant for water-in-oil pesticide emulsion, helping the active ingredients disperse evenly in oil phase and enhance the adhesion and penetration of pesticide liquid on crop leaves. It also finds wide use in coatings, inks, rubber and plastic industries. In paint and ink systems, it functions as dispersant and leveling agent to promote uniform dispersion of pigments and fillers and reduce sagging. In rubber and plastic processing, it works as internal lubricant and anti-fogging agent, improving the processing fluidity of resin and reducing the surface fogging phenomenon of plastic film. It can also be used in the production of drilling fluid and oilfield auxiliary chemicals to adjust the rheological property of fluid and stabilize the emulsion structure of oilfield working liquid.

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