H 6099 (OTTO) Hydroxypropyl cellulose average Mw ~80,000, average Mn ~10,000, powder Cas 9004-64-2 - used as an excipient, and topical ophthalmic protectant and lubricant. H 6099 (OTTO) Hydroxypropyl cellulose average Mw ~80,000, average Mn ~10,000, powder Cas 9004-64-2 - used as a binder in to nanostructured anatase membranes. Polymer conjugates made of HPC backbones and poly(N-isopropylacryamide) as side chains act as smart hydrogels. HPC has been reported to be studied as a glue.