HS Code for Soda lye

Soda lye, or liquid caustic soda, is classified under HS code 281512. This classification is part of Chapter 28, which covers inorganic chemicals. Heading 2815 covers sodium hydroxide (caustic soda), potassium hydroxide (caustic potash), and peroxides of sodium or potassium. Within this heading, the Harmonized System distinguishes between the physical states of the substance. Subheading 2815.11 is for the solid form (flakes, pellets, or blocks), while 2815.12 is specifically for sodium hydroxide in aqueous solution. Soda lye is a highly alkaline solution used extensively in the pulp and paper industry, textile processing, and chemical manufacturing. The classification is straightforward based on the chemical composition and the fact that it is dissolved in water. Even if the solution is highly concentrated, as long as it remains an aqueous solution of sodium hydroxide, it stays within 2815.12. This code is essential for identifying hazardous materials during transport, as soda lye is highly corrosive.

Products Included

• Liquid caustic soda
• Sodium hydroxide solution
• Lye for industrial cleaning
• Membrane grade caustic soda solution
• Diaphragm grade caustic soda solution

Common Misclassification

The most common misclassification is with HS code 2815.11, which is reserved for solid sodium hydroxide. Another frequent error is classifying soda lye under 3402 as a cleaning preparation. While lye is used for cleaning, the pure chemical solution belongs in Chapter 28. It should also not be confused with potassium hydroxide (caustic potash) solutions, which are classified under 2815.20.

FAQ

What is the HS code for Soda lye?

The HS code for soda lye (sodium hydroxide in aqueous solution) is 281512.

What is the difference between HS 281511 and 281512?

HS 281511 is used for solid sodium hydroxide (like flakes or pearls), whereas 281512 is used for sodium hydroxide dissolved in water (liquid soda lye).