Most Sisterna sucrose esters are dry powders, which are produced at high temperatures and then spray dried. The packing is performed aseptically, and therefore the microbiological contamination of Sisterna sucrose esters is very low. Harmful bacteria, yeast and fungi are absent.
Sisterna L70-C is a liquid solution of Sucrose Laurate in a mixture of water and ethanol. The ethanol works as a preservative.