Cellulose derivatives are modified forms of cellulose, a natural polymer found in plant cell walls. These derivatives are created by chemically altering the cellulose structure to enhance its properties, making it more useful in various applications. Common types include carboxymethyl cellulose (CMC) and hydroxypropyl cellulose (HPC), which are often used as thickening agents, stabilizers, or emulsifiers in food, pharmaceuticals, and cosmetics. The modification process allows cellulose derivatives to dissolve in water or other solvents, unlike pure cellulose, which is insoluble. This solubility expands their functionality, enabling their use in products like paints, adhesives, and textiles. Their versatility and biocompatibility make them valuable in many industries.