Colloidal Microcrystalline Cellulose is produced by co-processing purified microcrystalline cellulose (from acid hydrolysis of alpha-cellulose pulp) with a small percentage of sodium carboxymethylcellulose (CMC) as a dispersant. When properly hydrated under high shear, it forms a three-dimensional colloidal gel network of cellulose microcrystals (typically 0.2 microns) that provides thixotropic rheology, heat stability, and excellent suspension properties.
It is designated as E460(i) in the EU and holds GRAS status with the FDA (21 CFR 182.1745). Unlike native MCC which is insoluble and sediments, the colloidal grade self-disperses and functions as a stabilizer across a broad pH range (3.0-9.0). It is available in various grades optimized for different functionalities — emulsion stabilization, foam stabilization, heat-shock resistance, or protein stabilization.