Lithopone
General Product Information
| Article | Lithopone |
| Synonyms | Barium zinc sulfate sulfide, CI 77115, C.I. Pigment White 5 |
| CAS No. | 1345-05-7 |
| EEG No. | – |
| EINECS No. | 215-715-5 |
| IMO | – |
| Tariff Code | 32064200 |
| UN No. | – |
| VLG/ADR | – |
Description
Lithopone is a white inorganic pigment consisting of a mixture of barium sulfate (BaSO₄) and zinc sulfide (ZnS). It is used as a filler and white pigment in paints, plastics, rubber and printing inks, among others. Lithopone is a cost-effective alternative to titanium dioxide (TiO₂) and is valued for its high hiding power, chemical stability and compatibility with a variety of matrix materials.
Characteristics
- Odor: –
- Hygroscopic: –
- Color: White.
- Grade: Technical.
- Solubility: Not soluble in water.
- Shape: Powder.
Physical & Chemical Properties
| Chemical Structure. | Mixture of ZnS (~30%) and BaSO₄ (~70%) |
| Molar Weight | – |
| Melting Point. | ZnS > 1180 °C; BaSO₄ > 1350 °C |
| Boiling Point | – |
| Density | 4.1 – 4.4 g/cm³ |
| Refractive Index. | Between ZnS (2.37) and BaSO₄ (1.64) |
| pH | 6-8 (in suspension) |
Interessing Links
- CAS Common Chemistry – Lithopone
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Lithopone – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Lithopone
Applications
Lithopone is applied in various ways, for instance:
1. Paints & Coatings
Interior wall paints, primers, industrial coatings, decorative paints.
2. Printing Ink
For paper, packaging and textile printing.
3. Rubber Industry
As a filler and pigment in white rubber.
4. Ceramics & Enamel
For white, stable color applications.
5. Paper & Leather Industry
As a filler or optical whitening agent.
6. Plastics
Used as a pigment in PVC, polyolefins, ABS, PS and more.