HS Code for Hexachlorocyclohexane

Hexachlorocyclohexane (HCH), including the isomer known as lindane, is classified under HS code 2903.81. This classification is part of Chapter 29 (organic chemicals) and heading 2903 (halogenated derivatives of hydrocarbons). Specifically, 2903.81 covers halogenated derivatives of cyclanic, cyclenic, or cycloterpenic hydrocarbons. Unlike hexachlorobenzene, which is aromatic, HCH is a saturated cyclic compound. The classification includes all isomers of 1,2,3,4,5,6-hexachlorocyclohexane, such as alpha-HCH, beta-HCH, and gamma-HCH (lindane). This code is used for the technical grade chemical or pure isomers when they are not yet formulated into retail-ready pesticides. The distinction between cyclanic and aromatic hydrocarbons is fundamental in organic chemistry and the HS nomenclature; cyclanic compounds like HCH have a ring structure but lack the delocalized pi-electron system of benzene. Because HCH is a regulated substance under the Stockholm Convention due to its toxicity and persistence, it has been assigned a specific subheading to facilitate international monitoring. Importers must distinguish between the technical grade chemical (2903.81) and formulated products like lice shampoos or agricultural insecticides, which are classified elsewhere.

Products Included

• Lindane (gamma-hexachlorocyclohexane)
• Technical grade hexachlorocyclohexane (mixed isomers)
• Alpha-hexachlorocyclohexane
• Beta-hexachlorocyclohexane
• Pure HCH for laboratory use

Common Misclassification

HCH is frequently misclassified under 2903.92, which is the code for hexachlorobenzene. While the names are similar, the chemical structures (aromatic vs. cyclanic) are different. Another common error is classifying HCH-based pesticides under 2903.81; if the product is prepared for retail sale as an insecticide, it belongs in 3808.91. Furthermore, mixtures of HCH that are not separate chemically defined compounds may fall under 3824.84.

FAQ

What is the HS code for Lindane?

Lindane, which is the gamma isomer of hexachlorocyclohexane, is specifically classified under HS code 2903.81.

Is HCH classified as a pesticide in Chapter 29?

No, Chapter 29 covers the pure chemical. If the HCH is formulated into a pesticide (e.g., with surfactants or carriers) for retail sale, it must be classified under heading 3808.