HS Code for Terephthalic acid

Terephthalic acid is classified under HS code 2917.36. This code is situated within Chapter 29, which encompasses organic chemicals. Heading 2917 is designated for polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids, as well as their derivatives. Subheading 2917.36 specifically identifies terephthalic acid and its salts. This chemical is a vital precursor in the petrochemical industry, primarily used in the production of polyethylene terephthalate (PET) resins and polyester fibers. The classification is based on the chemical's molecular structure as an aromatic dicarboxylic acid. For customs purposes, the purity of the acid (such as Purified Terephthalic Acid or PTA) generally does not move it out of this code, as long as it retains its identity as terephthalic acid. The salts of terephthalic acid, such as sodium or potassium terephthalate, are also included here under the same subheading. Proper classification requires chemical analysis to ensure the product is not a derivative that has been further modified into a different chemical compound.

Products Included

• Purified Terephthalic Acid (PTA)
• Technical grade terephthalic acid
• Dimethyl terephthalate (DMT) salts
• Sodium terephthalate
• Potassium terephthalate

Common Misclassification

Terephthalic acid is often confused with other aromatic polycarboxylic acids found in 2917.39. Specifically, it must be distinguished from Isophthalic acid or Phthalic acid. While they are isomers, the HS nomenclature provides a specific subheading for the 'para' isomer (terephthalic acid). Another common error is misclassifying it under 2917.35, which is reserved for Phthalic anhydride. Because these chemicals are often used in the same industrial processes for plastics and resins, documentation must clearly state the chemical structure to avoid 2917.39 residual classification.

FAQ

What is the HS code for terephthalic acid?

The international HS code for terephthalic acid and its salts is 2917.36.

Is Purified Terephthalic Acid (PTA) classified differently?

No, PTA is the high-purity form of terephthalic acid and is classified under the same HS code, 2917.36, as it remains chemically defined as terephthalic acid.