HS Code for Sodium tripolyphosphate

Sodium tripolyphosphate (STPP) is classified under HS code 2835.31. This classification is found within Chapter 28, which covers inorganic chemicals. Heading 2835 is dedicated to phosphinates, phosphonates, phosphates, and polyphosphates. Sodium tripolyphosphate is a specific type of polyphosphate. The HS nomenclature provides a specific six-digit subheading, 2835.31, for \"Sodium triphosphate (sodium tripolyphosphate),\" making the classification process highly specific and less prone to interpretation errors compared to other chemicals. This classification applies to STPP whether it is chemically defined or not, as per the subheading text. The substance is widely used as a builder in heavy-duty laundry detergents and as a preservative in seafood and meats to retain moisture. When classifying this product, it is essential to distinguish between the pure chemical and formulated products. For instance, a detergent containing STPP would be classified under heading 3402, not 2835.31. The classification under 2835.31 is reserved for the chemical substance itself, often sold in bulk as a white powder or granular material.

Products Included

• Sodium tripolyphosphate (STPP) technical grade
• Sodium tripolyphosphate food grade
• Sodium triphosphate (pentasodium triphosphate)
• Granular sodium tripolyphosphate
• Powdered sodium tripolyphosphate

Common Misclassification

Sodium tripolyphosphate (2835.31) is frequently confused with other sodium phosphates. For example, mono- or disodium phosphate is classified under 2835.22. While they are all sodium-based phosphorus salts, the molecular structure of a polyphosphate (triphosphate) is distinct from a simple orthophosphate. Another common error is classifying STPP under 3402.20 or 3402.90 when it is intended for use in detergents. However, heading 3402 is for prepared washing and cleaning preparations. If the product is pure STPP, it must remain in 2835.31. Furthermore, sodium hexametaphosphate (SHMP) is another polyphosphate that is often confused with STPP; SHMP is classified under 2835.39 as \"Other polyphosphates.\" Accurate chemical identification via a Certificate of Analysis (COA) is necessary to distinguish between these subheadings.

FAQ

What is the HS code for sodium tripolyphosphate?

The HS code for sodium tripolyphosphate is 2835.31, which specifically identifies sodium triphosphate.

Can food-grade STPP use a different HS code?

No, the HS code 2835.31 applies to sodium tripolyphosphate regardless of its grade (technical or food), provided it is the pure chemical compound.