I'm using Hydroxyethyl Cellulose - 9004-62-0 Paint Grade White to slightly off-white powder
Ethyl cellulose - 9004-57-3 Industrial Grade White to slightly off-white powder
Hydroxypropyl Methyl Cellulose (HPMC) - 9004-65-3 Industrial Grade for construction white/off-white powder
MC Methyl Cellulose