Sorbitan monostearate is an ester of sorbitan (a sorbitol derivative) and stearic acid and is sometimes referred to as a synthetic wax.

[1] Sorbitan monostearate is used in the manufacture of food and healthcare products as a non-ionic surfactant with emulsifying, dispersing, and wetting properties.

[citation needed] It is also employed to create synthetic fibers, metal machining fluid, and as a brightener in the leather industry.

Sorbitan monostearate has been approved by the European Union for use as a food additive (emulsifier) (E number: E 491).

[2] It is also approved for use by the British Pharmacopoeia.