HS Code for Silica

Silica, chemically known as silicon dioxide (SiO2), is classified under HS code 2811.22. This classification falls within Chapter 28, which covers inorganic chemicals, precious metals, and rare-earth metals. Specifically, heading 2811 is reserved for other inorganic acids and other inorganic oxygen compounds of non-metals. Subheading 2811.22 is the specific international designation for silicon dioxide in its chemically defined form. This includes synthetic silica produced through chemical processes, such as precipitation or thermal decomposition. The classification is determined by the chemical purity and the manufacturing process, distinguishing it from naturally occurring sands or minerals that have not been chemically modified. For a product to be classified here, it must generally be a separate chemically defined compound, though certain exceptions for aqueous solutions or stabilizers apply under the General Rules of Interpretation (GRI).

Products Included

• Precipitated silica
• Fumed silica (pyrogenic silica)
• Silica gel (non-dehydrating grade)
• Colloidal silica in suspension
• Hydrated silica
• Amorphous synthetic silica

Common Misclassification

Silica is frequently misclassified under HS code 2505.10, which covers natural silica sands and quartz sands. The primary distinction is that Chapter 25 is for mineral products in their natural state, whereas 2811.22 is for chemically manufactured silicon dioxide. Another common error involves silica gel packaged as a desiccant; if it contains a color indicator or is prepared for retail sale as a dehydrator, it may be classified under HS code 3824.99. Additionally, silica used as a pigment may sometimes be confused with 3206.49, though 2811.22 remains the primary code for the pure chemical compound.

FAQ

What is the HS code for Silica?

The international HS code for chemically defined silicon dioxide (silica) is 2811.22.

Is silica sand classified under the same code as synthetic silica?

No, natural silica sand is classified under HS code 2505.10, while synthetic or chemically treated silica falls under 2811.22.