Carboxymethyl Cellulose Sodium (Na CMC) is widely used in electronics, pesticides, leather, plastics, printing, ceramics, daily-use chemicals and other fields. It is used as anti-caking agent, desiccant, emulsifier, formulation agent, humectant, stabiliser or thickener in foodstuffs, etc. It is also used as eye lubricant in pharmaceuticals to relieve eye dryness and inflammation. It is also used as flocculant, chelating agent, detergent, sizing agent, film-forming material and so on. It is also used in the manufacture of flexible sensors and to enhance the permeability of geosynthetic clay liners (GCL).