Hydroxylamine hydrochloride, ACS reagent..
Hydroxypropyl cellulose, Average M.W. 100.000..
Hydroxypropyl methacrylate, 97+%, mixture of isomers, stabilized..
Hydroxypropyl methyl cellulose, M.N. 86,000, viscosity 4,000 cP (2% solution)..
Hypophosphorous acid, 50 wt.% solution in water..