HS Code for Tetramethyl lead

Tetramethyl lead is classified under HS code 2931.10. This code is part of Chapter 29, which encompasses organic chemicals, and specifically heading 2931 for organo-inorganic compounds. Organo-inorganic compounds are defined as those where a carbon atom is linked directly to an element other than hydrogen, oxygen, nitrogen, sulfur, or a halogen. In the case of tetramethyl lead, the carbon atoms of the methyl groups are bonded directly to a central lead atom. Subheading 2931.10 is specific to tetramethyl lead and tetraethyl lead, which have historically been used as anti-knock additives in gasoline. The classification is straightforward for the pure chemical or simple mixtures of these two lead compounds. However, the classification is strictly for the chemical compound itself. Because of its toxicity and environmental impact, this substance is subject to various international regulations, including the Rotterdam Convention, which may require additional documentation during customs clearance despite the clear HS code assignment.

Products Included

• Tetramethyl lead (TML)
• Tetramethylplumbane
• Mixtures of tetramethyl lead and tetraethyl lead
• Technical grade tetramethyl lead

Common Misclassification

Tetramethyl lead is often misclassified under HS code 3811.11. Heading 3811 covers anti-knock preparations and additives for mineral oils. If the tetramethyl lead is already mixed with other substances (like ethylene dibromide or scavengers) to form a ready-to-use anti-knock preparation, it must be classified in 3811.11. Another common error is using 2931.90, which is the general code for other organo-inorganic compounds, ignoring the specific provision for lead compounds in 2931.10.

FAQ

What is the HS code for Tetramethyl lead?

The HS code for pure or technically pure tetramethyl lead is 2931.10.

Does the HS code change if it is used as a fuel additive?

If it is imported as a pure compound, it remains 2931.10. If it is imported as a prepared additive mixture for gasoline, it should be classified under 3811.11.