1.Trade name: Lithopone
2.Specifications: Lithopone B301 and Lithopone B311
3.Chemical formula: ZnS BaSO4
4.Molecular weight:: 79.9
5.CAS No.: 1345-05-7
6.HS Code.:320642
7.Property: Lithopone is a white pigment composed of a mixture of barium sulfate (28 - 30%) and zinc sulfide (68 - 70%) with trace amounts of zinc oxide.

8.Quality index:

1).B301(28%)
Ba+SO4 (as ZnS)%(m/m)------------------------------------99%min
Zinc (as ZnS) (m/m)%-----------------------------------------28%min
Zinc Oxide %(m/m) --------------------------------------------0.6%max
105degree Volatile%(m/m)-----------------------------------0.3%max
Water Soluble%(m/m) ----------------------------------------0.4%max
Screen residues (63um mesh) %(m/m) ------------------0.1%max
Oil absorption g/100g -----------------------------------------14%max
Color Killing (Compare with standard specimen) %----105%min
2).B311(30%)
Ba+SO4 (as ZnS)%(m/m)-------------------------------------99%min
Zinc (as ZnS) (m/m)%------------------------------------------30%min
Zinc Oxide %(m/m) ---------------------------------------------0.3%max
105degree Volatile%(m/m)------------------------------------0.3%max
Water Soluble%(m/m) ------------------------------------------0.3%max
Screen residues (63um mesh) %(m/m) --------------------0.1%max
Oil absorption g/100g -------------------------------------------10%max
Color Killing (Compare with standard specimen) %------105%min

9.Useage: Lithopone is produced by precipitation through filtering, heating and quenching works. 
Lithopone has mostly been replaced by titanium dioxide which is more durable, but it is much cheaper. It is used as a base for lake pigment and used as a inert pigment for paint, ink and cosmetics as well as in a large range of applications in plastic industry. It is used as a filler in paper, leather, and linoleum.