HS Code for Didecyl phthalate

Didecyl phthalate is classified under HS code 2917.33. This classification is determined by its status as an aromatic polycarboxylic acid derivative within Chapter 29 of the Harmonized System. Specifically, heading 2917 covers polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids, along with their halogenated, sulfonated, nitrated, or nitrosated derivatives. Didecyl phthalate is an ester of orthophthalic acid. The Harmonized System provides a specific subheading, 2917.33, for dinonyl or didecyl orthophthalates. This classification is based on the length of the alkyl chains (ten carbon atoms for decyl) attached to the phthalate structure. As a plasticizer used extensively in the polymer industry, it is classified here as a chemically defined compound. If the product is a mixture of different phthalates not meeting the definition of a single compound, it might fall elsewhere, but pure didecyl phthalate is strictly 2917.33.

Products Included

• Didecyl orthophthalate
• DDP
• Di-n-decyl phthalate
• Esters of orthophthalic acid with decyl alcohol
• Plasticizer grade didecyl phthalate

Common Misclassification

This product is often misclassified under HS code 2917.32, which is reserved for dioctyl orthophthalates (such as DEHP or DOP), or HS code 2917.34, which covers other esters of orthophthalic acid. The distinction relies entirely on the carbon chain length of the alcohol used in the esterification process. Additionally, if the product is sold as a prepared plasticizer mixture, it may be incorrectly declared under HS code 3812.20, which covers compound plasticizers for rubber or plastics.

FAQ

What is the HS code for Didecyl phthalate?

The HS code for Didecyl phthalate is 2917.33, covering dinonyl or didecyl orthophthalates.

How does it differ from Diisodecyl phthalate (DIDP)?

DIDP is an isomer of didecyl phthalate and is generally classified under the same HS code, 2917.33, as they share the same molecular formula and basic orthophthalate structure.