GelriteTMis a naturally-derived gelling polymer that can be used in a variety of applications as a solidification agent instead of agar. Produced by microbial fermentation, GelriteTM is a highly purified natural anionic polysaccharide with the variations commonly associated with agar. GelriteTM forms rigid, brittle, agar like gels at approximately half the use level of agar in presence of soluble salt like Mg 2+ and Ca 2+. Gels prepared with Gelrite are remarkably clear in comparison to those formed with agar. GelriteTM contains no contaminating matters (e.g., phenolic compounds) as found in agar that are toxic to certain sensitive organisisms.