Methylcellulose is a common ingredient used in the food, pharmaceutical, and cosmetic industries for various functions such as thickening, emulsifying, and stabilizing. It is a non-toxic, water-soluble polymer that is derived from cellulose. Some synonyms for methylcellulose include cellulose methyl ether, hypromellose, and hydroxypropyl methylcellulose. These synonyms refer to similar compounds that have different properties and uses in various industries. While they may be interchangeably used in some cases, it is important to understand their unique characteristics and applications to ensure proper utilization and avoid any undesirable effects.