Model Number

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

Span series

Composition: sorbitan fatty acid ester

Type: non-ionic

Structure formula:    HO          OH

                                —CH-CH₂OOCR  R(C₁₂;C₁₆; C₁₈)

O    OH

Item product	appearance（25℃）	Acid value （mgKOH/g）	Hydroxy value（mgKOH/g）	Water content （%）	saponification（mgKOH/g）
S-20	primrose yellow to yellow viscous liquid	≤8.0	330.0-360.0	≤1.0	160.0-175.0
S-40	yellowwaxy  substance	≤10.0	255.0-290.0		140.0-160.0
S-60	yellow or white flake	≤10.0	240.0-270.0		145.0-160.0
S-80	yellow transparent liquid	≤8.0	193.0-210.0	≤1.5	140.0-160.0

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. 

Packing: 200Kg iron drum or plastic barrel or 25Kg plastic bags

Storage and transpotation: storage and transportation of the non-toxic and non-danger, store in a cool, dry and airing place for one year