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Lithopone CAS#1345-05-7
CAS Number: 1345-05-7
Chemical Formula: BaO5S2Zn2
Synonyms:
LithoponeZns+BaSO4
LithoponeB311
C.I.Pigmentwhite5
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Appearance: White Powder
Lithopone CAS#1345-05-7
Lithopone is a bright white pigment used in paints, inks, leather, paper, linoleum and flour. It was developed in the 1870s as a replacement or supplement for lead carbonate (white lead), in order to overcome its disadvantages of toxicity, poor weathering properties and darkening in atmospheres containing sulphur compounds. It is an insoluble mixture of barium sulphate and zinc sulphide, which precipitates when barium sulphate and zinc sulphate solutions are mixed. The precipitate is recovered by filtration and then calcined (roasted) at temperatures above 600° C (1,112° F). It is now replaced by titanium dioxide in most applications, but it is still widely used in many products such as water paints.
Lithopone Chemical Properties |
density | 4.136~4.39 |
InChI | InChI=1S/Ba.H2O4S.O.S.2Zn/c;1-5(2,3)4;;;;/h;(H2,1,2,3,4);;;;/q+2;;;;;/p-2 |
InChIKey | YCEJLNKYYGDNTD-UHFFFAOYSA-L |
SMILES | S(=O)([O-])([O-])=O.O=[Zn].S=[Zn].[Ba+2] |
CAS DataBase Reference | 1345-05-7(CAS DataBase Reference) |
EPA Substance Registry System | C.I. Pigment White 5 (1345-05-7) |
Safety Information |
TSCA | TSCA listed |
Product Application of Lithopone CAS#1345-05-7
Lithopone is used as a pigment in paints, plastics, and printing inks. The particle size of it can be reduced through the use of polyvinyl alcohol (PVA) or sodium carbonate. PVA reduces particle size by absorbing the liquid and forming a gel-like substance around the particles. Sodium carbonate reduces particle size by forming a protective layer on the surface of the particles, which prevents them from clumping together. Lithopone also has analytical chemistry applications because it absorbs radiation well and can be used for identification purposes.
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