Lithopone is an organically coated white pigment based on a co‑precipitated zinc sulfide/barium sulfate compound. The zinc sulfide content is 30%/28% by weight, whereas, on a molecular basis, lithopone consists of the two components at a ratio of 1:1. It is a transparent white almost equal to zinc oxide in whiteness. It holds a medium position in density between lead white and zinc white.
Primary Names:
English: lithopone
French: lithopone
German: Lithopon
Italian: litopone
Russian: литопон
Spanish: lithopone
Alternate Names:
English: Barium zinc sulfate sulfide, Enamel White, barium zinc sulfate, barium zinc sulfide, zinc sulfide, barium sulfate mixture, Becton White, Charlton White, Zincolith, surya’s salt
| Pigment: | Lithopone |
| Pigment Classification: | Synthetic inorganic |
| Colour Index: | Pigment White 5 (77115) |
| Chemical Name: | Barium sulfate/zinc sulfide |
| Chemical Formula: | BaSO4•ZnS |
| CAS No. | 1345-05-7 |
| EINECS No. | 215-715-5 |
|
Item |
Lithopone B301 |
Lithopone B311 |
|
Total zinc and barium sulphate |
≥99.0 |
≥99.0 |
|
Zinc sulfide content, % |
≥28.0 |
≥30.0 |
|
Zinc oxide content, % |
≤0.6 |
≤0.3 |
|
Color, compared with standard samples |
better |
better |
|
Tint reducing power, compared with standard samples |
≥100 |
≥105 |
|
105°C volatile matter, % |
≤0.3 |
≤0.3 |
|
Water solubles, % |
≤0.4 |
≤0.3 |
|
pH-value |
6.0-8.0 |
6.0-8.0 |
|
Oil absorption, g/ 100g |
≤14 |
≤12 |
|
Hiding power |
≥ 5 % of standard sample |
≥ 5 % of standard sample |
