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Polysorbate 61, also known as polyoxyethylene (4) sorbitan monostearate consists of sorbitol, ethylene oxide, and stearic acid. It has a molecular formula of C32H62O10. At room temperature, it is in the form of pale-yellow to amber-colored oily liquid or paste. It is an O/W emulsifier with an HLB value of 9.6. It is soluble in ethanol, ethyl acetate, and toluene. It can also be dispersed in water. 

MOLECULAR FORMULA: C32H62O10 
MOLECULAR WEIGHT: 606

Technical Information of Polysorbate 61
According to Q/GDRH 012-2020, other parameters are available upon request.
ParametersUnitStandard value
Acid valuemg KOH/g≤3.0
Saponification valuemg KOH/g95~115
Hydroxyl valuemg KOH/g165~195
Moisturew/%≤3.0

Advantages of Polysorbate 61
Polysorbate is used as an emulsifier, solubilizer, stabilizer, diffuser, and lubricant.
Can be used in industry.

If you want to know more about list of non ionic surfactant, please visit our website.

Sorbitan ester is composed of sorbitol-derived hexitol anhydrides aka sorbitans and various fatty acids (lauric acid, palmitic acid, stearic acid, and oleic acid, etc.). Polyoxyethylene sorbitan fatty acid ester is attached to sorbitans through esterification reactions.