... toxic, odorless, insoluble in water, no reaction with H2S and lye, release H2S gas when reacting with strong acids. ... Specification: Item Lithopone B301Lithopone B311Total zinc and barium sulphate ≥99.0 ≥99.0 zinc sulfide content, ... , %≤0.5≤0.3Color, compared with standard samples betterbetterTint reducing power, compared with standard samples≥105≥105105°C volatile matter, ...