Barium Hydroxide Octahydrate : white granular. Barium Hydroxide Octahydrate .1.Specs :purity: 99.0% min BaCO3: 0.5% max Chloride: 0.01% max Iron(Fe): 10 ppm max HCl insoluble: 0.01% max2.Usage: It is mainly used as superfinished multi-purpose additive for the lubricant of internal-combustion engine and for barium-based grease and oil. It can also be used for beet sugar, medicine, plastic, rayon, ...