Chemical Property of Lithopone
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Chemical Property:
- Appearance/Colour:White powder
- PSA：137.80000
- Density:4.136-4.39 g/cm3
- LogP:0.26720
- Purity/Quality:
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28%-30% *data from raw suppliers
Safty Information:
- Pictogram(s):
Xi,
N
- Hazard Codes:Xi,N
- MSDS Files:
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Useful:
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Chemical Composition and Structure
Lithopone, also known as C.I. Pigment White 5, is a mixture of inorganic compounds primarily composed of barium sulfate (BaSO4) and zinc sulfide (ZnS). These insoluble compounds are combined in a powder form, with barium sulfate having a rhombus crystal structure and zinc sulfide having a cubic or hexagonal crystal structure.
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Uses
Lithopone is widely used as a white pigment in various applications, including latex coatings, water-based coatings, inks, rubber, plastics, papermaking, varnished cloth, leather, enamel, and more. It serves as an inorganic white pigment, offering high hiding power comparable to titanium dioxide while being more cost-effective.
Despite its desirable qualities as a white pigment, lithopone has limitations, including a tendency to darken in sunlight and short-lived phosphorescence. These factors may impact its use in certain applications, such as in artists' pigments.
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Production Methods
Lithopone is primarily produced through roasting and leaching methods, which involve the reaction of natural barite and anthracite to obtain barium sulfide. This barium sulfide is then reacted with zinc sulfate to produce a mixture of barium sulfate and zinc sulfide, which is further processed into lithopone powder.
