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SPAN 20 & SPAN 85
Span 20
Span 20 is a DfE approved nonionic surfactant, which is a mixture of partial ester of sorbitol and its anhydrides and is made from fatty acids such as lauric, palmitic, stearic, or oleic. It is lipophilic and generally soluble or dispersible in oil, forming water-in-oil emulsions. It is used for its excellent emulsification properties in personal care, industrial cleaning, fiber finish, crop protection, water treatment, paints and coatings, lubricants, and other industrial applications.
Usage: Span 20 is mainly used in medicine, cosmetics, textiles etc. as water/oil type emulsifier, wetting agent and lubricant.
CAS # [1338-39-2]
Formula C18H34O6
Formula Weight 346.47
Chemical Synonym: sorbitan monolaurate
Appearance/Color: Yellow to yellow-green
Form: Liquid
Density: 1.058 gm/ml
Purity (GC): > 44%
Specification:
Lauric Acid
Myristic Acid
Palmitic Acid
Linolenic Acid
Span 85
Usage: Span 85 is mainly used in medicine, cosmetics, textiles, paints petroleum etc. as emulsifier, thickener, anti-rust agent etc.
CAS # [26266-58-0]
Formula C60H108O8
Formula Weight 957.52
Chemical Synonym: Sorbitan trioleate
Appearance/Color: Clear/ Yellow to dark yellow
Form: Viscous Liquid
Density: 0.952 – 0.956 gm/ml
Specification:
Oleic Acid > 60%
Linoleic Acid 3 – 12%
Linolenic Acid < 3%
Palmitoleic Acid 2 – 6%
SPAN is a registered trademark of ICI group, CRODA International PLC.