HS Code for Caustic soda

Caustic soda, or sodium hydroxide (NaOH), is classified under HS code 2815.11 specifically when it is in solid form. This includes flakes, pellets, or blocks. The classification is based on the chemical identity of the substance as an inorganic base. The Harmonized System provides a specific split for sodium hydroxide based on its physical state: 2815.11 for solids and 2815.12 for aqueous solutions (lye). This distinction is critical for customs valuation and regulatory compliance, as the solid form is typically 100% concentration while solutions vary. Caustic soda is a fundamental industrial chemical used in paper manufacturing, textile processing, and the production of soaps and detergents, and its classification remains consistent globally under the HS framework.

Products Included

• Sodium hydroxide flakes
• Sodium hydroxide pellets
• Anhydrous caustic soda
• Caustic soda pearls
• Sodium hydroxide blocks

Common Misclassification

The most common error is using 2815.11 for liquid caustic soda, which must be classified under 2815.12. It is also occasionally confused with 2815.20 (potassium hydroxide) or 2807.00 (sulfuric acid) in general chemical handling contexts, though the chemical properties are vastly different. Mixtures containing caustic soda may fall under 3824.

FAQ

What is the HS code for caustic soda?

The HS code for solid caustic soda is 2815.11, while the liquid form is 2815.12.

Why is the physical state important for classification?

The Harmonized System explicitly separates sodium hydroxide by state (solid vs. liquid) to facilitate more accurate trade statistics and duty applications.