Sorbitan oleate is a synthetic or animal-derived ingredient used as an emulsifier and cleansing agent in cosmetics. Considered safe as used in cosmetics.
References for this information:
Journal of Industrial and Engineering Chemistry, November 2017, Volume 55, pages 198-203
Micro & Nano Letters, September 2016, Volume 11, Issue 9, pages 498-502
Journal of American Oil Chemists’ Society, July 2003, Volume 80, Issue 7, pages 647-651
Journal of Cosmetic Science, November-December 2002, pages 363-374
International Journal of Toxicology, December 2001, Volume 21, Supplement 1, pages 93-112
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