HS Code for Potassium persulphate

Potassium persulphate, also known as potassium peroxydisulphate (K2S2O8), is classified under HS code 2833.40. This classification is found within Chapter 28 of the Harmonized System, which deals with inorganic chemicals. Heading 2833 is dedicated to sulphates, alums, and peroxosulphates (persulphates). The specific subheading 2833.40 is reserved for peroxosulphates, which includes the ammonium, sodium, and potassium salts of peroxydisulphuric acid. The classification is determined by the chemical structure of the salt; specifically, the presence of the peroxo group (-O-O-) linked to the sulphate groups. Potassium persulphate is a white, crystalline, odorless salt that is highly soluble in water. It is a robust oxidizing agent used extensively in the polymer industry as an initiator for the polymerization of various monomers, such as in the production of synthetic rubber and latex. It also finds significant application in the cosmetics industry as a bleaching agent for hair and in the electronics industry for etching printed circuit boards. The HS system requires that these peroxosulphates be grouped together, separate from standard sulphates, due to their distinct chemical properties and higher reactivity.

Products Included

• Potassium peroxydisulphate (K2S2O8)
• Technical grade potassium persulphate for industrial polymerization
• Potassium persulphate used in hair bleach formulations
• Analytical reagent grade potassium persulphate

Common Misclassification

A common misclassification occurs with HS code 2833.29, which covers "other sulphates." While potassium persulphate is a derivative of sulphate chemistry, the presence of the peroxo bond mandates its classification under 2833.40. Additionally, it is sometimes confused with potassium sulphate (K2SO4), which is classified under 3104.30 when used as a fertilizer or 2833.29 for technical grades, but these lack the oxidizing peroxide linkage found in 2833.40.

FAQ

What is the HS code for potassium persulphate?

The HS code for potassium persulphate is 2833.40, which specifically includes peroxosulphates.

Can potassium persulphate be classified as a fertilizer?

No, unlike potassium sulphate, potassium persulphate is an oxidizing agent and initiator, not a nutrient source for plants, and therefore does not fall under Chapter 31.