Lithopone B301, Lithopone B311 Powder
Product Name: Lithopone B301, Lithopone B311
Synonyms: Zincolith; pigment white 5; Charlton White; Becton White; tithopone; C.I. 77115
CAS Number: 1345-05-7
Characteristics: White powder.
Purity (Assay): 99%
Molecular Formula: BaO5S2Zn2
Structure:
UN Number: UN 3082 9/PG 3
Dangerous Cargo Class: 6.1
Package:
25kg/paper-plastic compound bag
Or as clients' requests offer 500kg/1000kg jumbo bag.
Density: 4.136 ~ 4.39
Storage: Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
KEY Words:
Lithopone, Lithopone B301, Lithopone B311
Description:
Lithopone B301, Lithopone B311 powder, C.I. Pigment White 5, is a mixture of inorganic compounds, widely utilized as a white pigment. It is composed of a mixture of barium sulfate and zinc sulfide. These insoluble compounds blend well with organic compounds and confer opacity. Lithopone B301, Lithopone B311 powder is famous for the cheap production costs, greater coverage. Related white pigments include titanium dioxide, zinc oxide ("zinc white"), and zinc sulfide
Lithopone B301, Lithopone B311 powder is also widely applied in paints and enamels
Lithopone B301, Lithopone B311 powder is white powder, non-toxic, odorless, insoluble in water, no reaction with H2S and lye, release H2S gas when reacting with strong acids.
Lithopone B301, Lithopone B311 powder, brilliant white pigment used in paints, inks, leather, paper, linoleum, and face powder. It was developed in the 1870s as a substitute or supplement for lead carbonate (white lead), to overcome its drawbacks of toxicity, poor weathering, and darkening in atmospheres that contain sulfur compounds. Lithopone B301, Lithopone B311 powder is an insoluble mixture of barium sulfate and zinc sulfide that precipitates upon mixing solutions of barium sulfide and zinc sulfate. The precipitate is recovered by filtration, then calcined (roasted) at temperatures above 600° C (1,112° F). Although Lithopone B301, Lithopone B311 powder has been replaced in many applications by titanium dioxide, it is still widely used in a number of products, such as water paints.
Lithopone B301, Lithopone B311 powder is also called C.I. 77115; Pigment White 5; Barium zinc sulfate sulfide and belongs to Product Categories of Inorganic & organic chemicals; uvcbs-inorganic. Lithopone B301, Lithopone B311 powder is used in water-based paints because of its excellent alkali resistance. It is widely utilized as a whitener and reinforcing agent for rubber and as a filler and whitener for paper. Lithopone B301, Lithopone B311 powder is considered to be poisonous because it is able to liberate hydrogen sulfide upon decomposition by heat, moisture, and acids. When heated to decomposition Lithopone B301, Lithopone B311 powder emits highly toxic fumes of SOx, ZnO, and H2S.
Preparation of Lithopone:
Lithopone(CAS NO.1345-05-7) is manufactured by a process in which barium sulfide solution is prepared by reducing barite ore (BaSO4) with carbon and leaching the resulting mass.
BaSO4 + 4C=BaS + 4CO
Scrap zinc or concentrated zinc ores are dissolved in sulfuric acid, the solution is purified and the two solutions are reacted. A heavy mixed precipitate results that is 28 to 30% zinc sulfide and 72 to 70% barium sulfate.
ZnSO4 + BaS + ZnS + BaSO4
This precipitate is not suitable for a pigment until it is filtered, dried, crushed, heated to a high temperature and quenched in cold water. The second heating in a muffle furnace at 725 °C produces crystals of the right optical size.
Applications:
Lithopone B301, Lithopone B311 powder is widely used in coatings, printing ink, rubber, plastic industry, etc.
Basic Information:
Name:
Lithopone
CAS NO. :
1345-05-7
Appearance:
White powder
Specific gravity:
4.3 g/Cm3
Fengchen Group is a leading supplier of Lithopone B301, Lithopone B311 powder from China. We specialize in wholesale and bulk amounts, ensuring all our clients have the right supplier of Lithopone B301, Lithopone B311 powder when they need it. When you are going to buy or purchase Lithopone B301, Lithopone B311 powder, please turn to Fengchen Group.
Certificate of Analysis (Lithopone B301, Lithopone B311 powder TDS)
Technical Specifications：(Standard：Q/SNBJ1-2012)
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
Stability and darkening:
Lithopone B301, Lithopone B311 powder’s 2 main components:
Although barium sulfate is almost completely inert, zinc sulfide degrades upon exposure to UV light, leading to darkening of the pigment. The severity of this UV reaction is dependent on a combination of two factors; how much zinc sulfide makes up the pigments formulation, and its total accumulated UV exposure. Depending on these factors Lithopone B301, Lithopone B311 powder itself may vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant might be used, like small amount of cobalt salts, which would be added to the formulation. This process creates cobalt-doped zinc sulfide. The cobalt salts help to stabilize zinc sulfide so it will not have as severe a reaction to UV exposure.
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Related Products:
Lithopone B301, Lithopone B311 Powder
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