Hydroxypropyl Methyl Cellulose (HPMC) 3000 cPs, often labeled as a Laboratory Reagent (LR) grade, is a high-viscosity, white to off-white, odorless cellulose ether used primarily as a thickener, binder, film-former, and stabilizer. This viscosity grade provides excellent thickening properties in aqueous solutions, making it ideal for laboratory applications.