HS Code for Tributyltin

Tributyltin compounds are classified under HS code 2931.20. This code is located within Chapter 29, which encompasses organic chemicals. Heading 2931 is a broad category for other organo-inorganic compounds. These are compounds where a carbon atom is linked directly to a heteroatom, such as tin, lead, or phosphorus, other than hydrogen, oxygen, nitrogen, sulfur, or halogens. Subheading 2931.20 was specifically created to monitor and control tributyltin compounds due to their environmental impact and toxicity, particularly in marine environments. Classification is based on the chemical structure of the molecule, where three butyl groups are bonded to a central tin atom. This specific subheading ensures that these substances are tracked accurately in international trade, separate from other organo-tin compounds. The classification follows GRI 1, as the heading and subheading specifically name these compounds. It is important to note that this code applies to chemically defined tributyltin compounds in their pure or technically pure state. Mixtures or formulated products containing these compounds may be classified elsewhere depending on their use and composition.

Products Included

• Tributyltin oxide (TBTO)
• Tributyltin fluoride
• Tributyltin chloride
• Tributyltin methacrylate
• Tributyltin benzoate

Common Misclassification

Tributyltin compounds are often misclassified under HS code 2931.90, which is a residual category for other organo-inorganic compounds. However, because 2931.20 is a specific named subheading for tributyltin, it takes precedence. Another common error involves HS code 3808, which covers insecticides, fungicides, and herbicides. If the tributyltin is formulated as a finished biocide or anti-fouling agent for retail sale, it must be classified in Chapter 38 rather than Chapter 29.

FAQ

What is the HS code for tributyltin?

The HS code for tributyltin compounds is 2931.20, classified as organo-inorganic compounds.

Are all organo-tin compounds classified under 2931.20?

No, only tributyltin compounds are classified under 2931.20. Other organo-tin compounds, such as dibutyltin or monobutyltin, are generally classified under 2931.90.