HS Code for Potassium ferrocyanide

Potassium ferrocyanide, also known as yellow prussiate of potash, is classified under HS code 2837.20. This heading specifically covers complex cyanides. Unlike simple cyanides where the cyanide ion is directly bonded to a metal cation, complex cyanides involve a coordination complex where cyanide ligands are bonded to a central metal atom (in this case, iron), which then forms a salt with potassium. Chapter 28 of the Harmonized System handles inorganic chemicals, and 2837.20 is the designated spot for these more chemically intricate compounds. Potassium ferrocyanide is widely used as an anti-caking agent in road salt and table salt, as well as in the production of pigments like Prussian blue and in the wine-making process to remove copper and iron. The classification is based on the presence of the complex [Fe(CN)6]4- anion. This distinction is vital because complex cyanides generally exhibit much lower toxicity than simple cyanides, and their industrial applications are significantly different. Accurate classification ensures that the product is not flagged as a highly toxic simple cyanide during the customs clearance process.

Products Included

• Potassium ferrocyanide trihydrate
• Yellow prussiate of potash
• Food-grade potassium ferrocyanide (E536)
• Industrial grade complex cyanides
• Potassium hexacyanoferrate(II)

Common Misclassification

It is frequently confused with HS code 2837.19, which covers simple cyanides like potassium cyanide. The distinction lies in the "complex" nature of the ferrocyanide ion. It may also be confused with potassium ferricyanide, which also falls under 2837.20; while the code is the same, the chemical properties and oxidation states of the iron differ. Another error is classifying it under 3104 if it is mistakenly thought to be a fertilizer due to the name "potash."

FAQ

What is the HS code for potassium ferrocyanide?

The HS code for potassium ferrocyanide is 2837.20.

Is it the same as potassium cyanide?

No, potassium ferrocyanide is a complex cyanide and is significantly less toxic than simple potassium cyanide, which is classified under 2837.19.