Model Number

S-20,S-40,S-60,S-80

Span series
Composition: sorbitan fatty acid ester
Type: non-ionic
Structure formula: HO OH
?H-CH2OOCR R(C12;C16; C18)
O OH
Item
product appearance（25°C） Acid value Hydroxy value saponification
（mgKOH/g） （mgKOH/g） （mgKOH/g）
S-20 primrose yellow to yellow viscous liquid ≤8.0 330-360 160-175
S-40 yellow waxy substance ≤10.0 255-290 140-160
S-60 yellow flake or waxy substance ≤10.0 240-270 145-160
S-80 yellow brown transparent viscous substance ≤10.0 190-220 140-160

Performance and application: S-20 has little solubility in mineral oil, Isopropanol, tetrachloroethylene and xylene, difficult to solve in water, and is milky solution after dispersion. It is used as W/O emulsifier in medicine, cosmetics and textiles industries. S-40 is used as dispersants of printing ink and oil-emulsifying, emulsifiers of emulsion polymerization, effective additives of water-resistant textile, emulsifier and finishing agent near well in oil field. S-60 is used as constituents of synthetic fiber finish oil, soften agents of fiber post processing, and emulsifiers in plastic and pesticide industry. S-80 is used as finish oil of cord of Nylon and building of finish oil for polyacrylonitrile fiber, and also used in such industries as oil drilling, printing ink, cosmetics, high-grade scouring agent, metal cutting, and machining, in addition, as emulsified explosion and food additives.