HS Code for Hydrated lime

Hydrated lime, also known as slaked lime or calcium hydroxide, is classified under HS code 2522.20. This classification is found within Chapter 25, which covers salt, sulfur, earths, and stone, specifically focusing on lime and cement. According to the Explanatory Notes for heading 2522, this code includes lime obtained by the hydration of quicklime (calcium oxide). The process involves adding water to quicklime, resulting in a chemical reaction that produces calcium hydroxide. It is important to note that this classification is for industrial or construction-grade hydrated lime. If the product is chemically pure or presented in specific forms for pharmaceutical use, it might be excluded from this chapter, but for the vast majority of commercial and industrial applications, 2522.20 is the definitive code.

Products Included

• Slaked lime
• Calcium hydroxide (industrial grade)
• Building lime (hydrated)
• Agricultural hydrated lime

Common Misclassification

Hydrated lime is frequently confused with quicklime, which is classified under HS code 2522.10. The difference is that quicklime is calcium oxide (unslaked), while hydrated lime has undergone the slaking process. Another common error is classifying it under HS code 2825.90, which covers chemically pure calcium hydroxide. However, Chapter 25 notes specify that heading 2522 includes slaked lime even if it is relatively pure, provided it is not prepared as a laboratory reagent or for specific chemical synthesis requiring high-purity standards.

FAQ

What is the HS code for hydrated lime?

The HS code for hydrated lime (slaked lime) is 2522.20.

Is calcium hydroxide always classified under 2522.20?

No, while industrial-grade calcium hydroxide is 2522.20, chemically pure calcium hydroxide is classified under HS code 2825.90.