HS Code for Sodium hydroxide solution

Sodium hydroxide in aqueous solution, commonly known as caustic soda lye or liquid soda, is classified under HS code 2815.12. This classification is found in Chapter 28, which covers inorganic chemicals. Heading 2815 specifically includes sodium hydroxide (caustic soda), potassium hydroxide (caustic potash), and peroxides of sodium or potassium. The heading is split into two primary subheadings for sodium hydroxide based on its physical form: 2815.11 for solid forms (such as pellets, flakes, or beads) and 2815.12 for aqueous solutions. The classification under 2815.12 is straightforward as long as the sodium hydroxide is dissolved in water. This applies regardless of the concentration of the solution, provided it is not mixed with other chemicals that would give it the character of a preparation. Sodium hydroxide solution is a highly alkaline substance used extensively in pulp and paper manufacturing, textile processing, and chemical production. The purity of the solution does not typically affect the classification under this code, as long as it remains a basic aqueous solution of the chemical.

Products Included

• Caustic soda lye
• Liquid sodium hydroxide
• Aqueous solution of sodium hydroxide
• Soda lye
• Purified sodium hydroxide solution

Common Misclassification

The most common misclassification is using HS code 2815.11, which is strictly for solid sodium hydroxide. Importers must distinguish between the dry form and the liquid form. Another potential error is classifying the solution under 3824.99 if it is marketed as a specific industrial pipe cleaner or degreaser containing surfactants. If the solution contains additives that perform a specific function beyond simple pH adjustment or chemical feedstock use, it may be moved to Chapter 34 or 38. Additionally, potassium hydroxide solutions (2815.20) are sometimes confused with sodium hydroxide solutions due to their similar caustic nature.

FAQ

What is the HS code for sodium hydroxide solution?

The HS code for sodium hydroxide in aqueous solution is 2815.12.

How is liquid caustic soda distinguished from solid caustic soda in the HS system?

Solid caustic soda (flakes, pellets) is classified under 2815.11, while the liquid (aqueous solution) form is classified under 2815.12.