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Sorbitan monostearate, also known as sorbitan stearate/SMS, is synthesized by the esterification of sorbitan with stearic acid. It has a molecular formula of C24H46O6. At room temperature, this sorbitan ester is in the form of a pale-yellow to yellow granular solid. It has a sorbitan monostearate HLB value of 4.7. It has extensive uses such as, keeps moisture of yeasts; enhances oil-water dispersion stability; emulsifies and stabilizes in cosmetic, pharmaceutical, feeds, coating, textile formulations. It is commonly used in combination with polysorbate 60.

Technical Information of Sorbitan Monostearate
According to GB13481-2011, other parameters are available upon request.

ParametersUnitStandard value
Fatty acidw/%71~75
Sorbitolw/%29.5~33.5
Acid valuemg KOH/g≤10
Saponification valuemg KOH/g147~157
Hydroxyl valuemg KOH/g235~260
Moisturew/%≤1.5
Arsenicmg/kg≤3
Pbmg/kg≤2

Advantages of Sorbitan Monostearate

Versatile application in food formulations (e.g. enhance volume and texture and anti-staling in cakes; act as bloom retardant and flow modifier in chocolate) 
Soluble in ethanol, toluene, mineral oil and ethyl acetate at temperatures higher than its melting point
Can be used in food, pharmaceutical, cosmetic, feed and industry
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