Our Span range of sorbitan esters are widely used as W/O emulsifiers and when used in combination with ethoxylated sorbitan esters (the Tween range) they contribute to the overall stability of O/W emulsions. Manipulation of the Span/Tween ratio produces emulsifying systems of various HLB values, allowing the emulsification of a wide range of oils and waxes.
Span 40 possesses a wax-like structure, useful when rigidity is required in topical formulations. Recommended topical usage levels of 0.5-5%.
Product details
Pharmacopoeia compliance
- FDA-IID listed
- Ph. Eur.
- USP/NF
Chemical group
- Sorbitan ester
Administration route
- Topical
Market application
- Dermatology
- Human pharmaceutical
- Veterinary health
Functions
- Emulsifier
Physical form
- Off-white solid; pastilles
HLB
- 6.70