Overview
Sodium hexafluorosilicate (Na2SiF6) is a versatile chemical compound primarily used in the leather industry. Its ability to stabilize and enhance leather tanning processes makes it a valuable additive. The compound is also employed in water fluoridation and ceramics due to its unique chemical properties. Synthesized from silica and hydrofluoric acid, sodium hexafluorosilicate is known for its stability and effectiveness in industrial applications. Its role in leather processing includes improving the durability and quality of the final product, making it a preferred choice for tanneries worldwide.
Physical and Chemical Properties
Sodium hexafluorosilicate appears as a white crystalline powder with a density of 2.68 g/cm³. It decomposes at 300°C and is moderately soluble in water, with a solubility of approximately 0.6 g/100 mL at 20°C. The compound is non-flammable but can be corrosive in moist conditions. Its chemical stability and resistance to high temperatures make it suitable for various industrial processes. However, it requires careful handling due to its potential to release toxic hydrogen fluoride gas when exposed to acids or high humidity.
Main Applications
The primary use of sodium hexafluorosilicate is in the leather tanning industry, where it acts as a stabilizing agent and enhances the tanning process. It helps in achieving uniform leather quality and improves resistance to wear and tear. Beyond leather, it is used in water fluoridation to prevent dental caries and in ceramics and glass etching for its ability to create intricate designs. Its applications extend to metal surface treatment and as a flux in metallurgy.
Safety and Storage
Sodium hexafluorosilicate is harmful if ingested or inhaled, necessitating the use of protective equipment such as gloves and masks. It should be stored in a cool, dry place, away from moisture and incompatible substances like acids and bases. Proper ventilation is essential in areas where the compound is handled to prevent the accumulation of toxic fumes. Spills should be cleaned immediately using appropriate safety measures to avoid exposure and environmental contamination.
B2B Procurement Guide
When procuring sodium hexafluorosilicate for industrial use, it is crucial to verify the purity levels and supplier certifications. The reference price ranges from approximately $500 to $800 per ton, depending on purity and supplier. Buyers should also consider the logistical aspects, such as packaging and transportation, to ensure the chemical's integrity upon delivery. Establishing long-term relationships with reliable suppliers can help secure consistent quality and competitive pricing.
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