Silicates; of sodium (excluding sodium metasilicates)

HS code 283919 covers a range of silicate compounds, primarily those of sodium, excluding sodium metasilicates. These silicates are essential industrial chemicals with a wide array of applications across various sectors, including construction, glass manufacturing, and chemical processing. As a key component in numerous products, the silicates industry plays a vital role in supporting the broader economy and enabling the development of innovative technologies.

The production of silicates under HS code 283919 typically involves the reaction of silicon dioxide (SiO2) with sodium hydroxide (NaOH) or sodium carbonate (Na2CO3) at high temperatures. This process, known as the soda-lime process, results in the formation of sodium silicate, which can then be further processed and refined to meet specific industry requirements.

The primary inputs for the production of silicates under HS code 283919 include silicon dioxide (sand or quartz), sodium hydroxide or sodium carbonate, and energy sources for the high-temperature reactions. Additionally, specialized equipment, such as furnaces, reactors, and purification systems, are essential for the manufacturing process.

The main outputs of the silicates industry under HS code 283919 are various forms of sodium silicates, including sodium silicate solutions, powders, and solid forms. These silicates find applications in 282300 Sodium Silicates, 320611 Pigments and preparations based on titanium dioxide, 320912 Paints and varnishes based on acrylic or vinyl polymers, and 321490 Other paints and varnishes, among other industries.