Overview
Barium sulfide (BaS) is a high-purity inorganic compound primarily used in industrial applications. It is produced by reducing barium sulfate (barite) with carbon at high temperatures. The compound is known for its reactivity, particularly with water, where it releases hydrogen sulfide gas. Due to its toxic nature, barium sulfide must be handled under controlled conditions. It is a key intermediate in the production of other barium compounds, including barium carbonate and barium chloride, which are widely used in various industries.
Physical and Chemical Properties
Barium sulfide appears as a white to gray crystalline solid with a density of 4.25 g/cm³. It has a high melting point of approximately 1200°C, at which it decomposes rather than boils. The compound is soluble in water, where it undergoes hydrolysis to produce barium hydroxide and hydrogen sulfide. One of its notable chemical properties is its reactivity with acids, which leads to the formation of barium salts and hydrogen sulfide gas. This reactivity makes it useful in chemical synthesis but also necessitates careful handling to avoid hazardous exposures.
Main Applications
Barium sulfide is primarily used in the production of pigments, particularly lithopone, a white pigment made by combining BaS with zinc sulfate. It is also employed in the manufacture of phosphors for cathode-ray tubes and other luminescent materials. In the personal care industry, barium sulfide serves as a depilatory agent in hair removal creams. Additionally, it acts as a precursor for other barium compounds, such as barium carbonate, which is used in glass and ceramic production, and barium chloride, a common laboratory reagent.
Safety and Storage
Barium sulfide is highly toxic and poses significant health risks if ingested, inhaled, or absorbed through the skin. Exposure can lead to severe irritation, respiratory distress, and systemic toxicity. Proper personal protective equipment (PPE), including gloves, goggles, and respirators, is essential when handling this compound. Storage requires a cool, dry, well-ventilated environment, away from moisture and acids. Containers must be tightly sealed to prevent reaction with atmospheric moisture, which can release hazardous hydrogen sulfide gas. Spills should be neutralized with a weak acid, such as vinegar, and cleaned up promptly.
B2B Procurement Guide
When procuring barium sulfide, buyers should prioritize suppliers who provide material safety data sheets (MSDS) and certificates of analysis (CoA) to verify purity and safety compliance. High-purity grades (≥98%) are typically required for industrial applications. Bulk purchases often yield cost savings, but storage capacity and handling capabilities must be assessed. Buyers should also consider logistics, as barium sulfide is classified as a hazardous material and may require special transportation arrangements.
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