Sorbitan tristearate in food, also known as STS, is synthesized by the esterification of sorbitan with stearic acid. It has a molecular formula of C60H112O8. At room temperature, it is in the form of a white to yellow granular solid. It has an HLB value of 2.1, which is fairly lipophilic. As a food additive, span sorbitan tristearate can reduce the turbidity of vegetable oil containing high saturated fatty acids. It can also improve the fat crystal structure and stability in chocolate and margarine. In addition, it acts as an emulsifier in the cosmetic industry and as a lubricant in the textile industry.

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CAS NO.: 26658 19 5

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E NO.: E492

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MOLECULAR FORMULA: C60H112O8

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MOLECULAR WEIGHT: 963.51

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Technical Information of Sorbitan Tristearate

According to GB29220-2012, other parameters are available upon request.

Parameters Unit Standard value

Fatty acid w/% 85~92

Sorbitol w/% 14~21

Acid  value mg KOH/g ≤15

Saponification value mg KOH/g 176~188

Hydroxyl value mg KOH/g 66~80

Moisture w/% ≤1.5

Residue on ignition w/% ≤0.5

Pb mg/kg ≤2

Advantages of Sorbitan Tristearate

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Wide range of applications; very useful as emulsifiers in food formulation and has multiple functions as food additives

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The sorbitan tristearate can disperse in in petroleum ether, mineral oil, and vegetable oil

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You can spot the existence of this sorbitan fatty acid ester in the food, cosmetics, and textile industries.

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