HS Code for DOP

Dioctyl orthophthalates, commonly known as DOP or DEHP, are classified under HS code 291732. This classification is governed by the rules of Chapter 29, which covers organic chemicals. Specifically, heading 2917 is reserved for polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids, as well as their halogenated, sulfonated, nitrated, or nitrosated derivatives. Within this heading, the aromatic polycarboxylic acids are further subdivided. DOP is an ester of phthalic acid, specifically the dioctyl ester of orthophthalic acid. Because it is a chemically defined organic compound and a specific ester of an aromatic polycarboxylic acid, it is assigned to the sub-heading 291732. The classification remains consistent regardless of whether the product is used as a plasticizer in PVC production or in other industrial applications, provided it remains a pure chemical substance not mixed with other plasticizers.

Products Included

• Bis(2-ethylhexyl) phthalate
• Di(2-ethylhexyl) phthalate
• Plasticizer-grade Dioctyl Phthalate
• Technical grade DOP
• Standard orthophthalic acid dioctyl esters

Common Misclassification

DOP is frequently misclassified under HS code 291734, which is designated for dibutyl orthophthalates. While both are phthalate esters, the carbon chain length of the alcohol component distinguishes them. Another common error is classifying DOP under 291733, which covers dinonyl or didecyl orthophthalates. Furthermore, if DOP is imported as part of a prepared mixture of plasticizers for rubber or plastics, it should be classified under 381220 (compound plasticizers) rather than the pure chemical code of 291732. Importers must verify the chemical purity and the specific alcohol chain to ensure the correct sub-heading is applied.

FAQ

What is the HS code for DOP?

The HS code for Dioctyl orthophthalates (DOP) is 291732.

Is DOP classified differently if used for medical devices?

No, the HS code 291732 is based on the chemical identity of the substance. Even if the DOP is intended for medical-grade PVC, it remains under this code as long as it is the unmixed chemical compound.