HS Code for Phthalic anhydride

Phthalic anhydride is classified under HS code 291735. This classification is situated within Chapter 29 (Organic Chemicals) and heading 2917, which covers polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids. Subheading 291735 is a specific, named entry for phthalic anhydride. The classification is based on the chemical identity of the substance as the anhydride of phthalic acid, an aromatic polycarboxylic acid. It is produced industrially by the catalytic oxidation of orthoxylene or naphthalene. In the global market, it is a critical intermediate used in the manufacture of phthalate plasticizers, alkyd resins, and polyester resins. Because it is a specifically named chemical in the Harmonized System, its classification is straightforward under GRI 1, provided the product is a separate chemically defined compound. It is typically traded as white crystalline flakes or in a molten state in heated tankers, both of which fall under this specific HS code.

Products Included

• Pure phthalic anhydride (99%+)
• Industrial grade phthalic anhydride flakes
• Molten phthalic anhydride
• Phthalic anhydride for resin manufacturing

Common Misclassification

Phthalic anhydride is sometimes misclassified under 291739, which is the 'other' category for aromatic polycarboxylic acids. It may also be confused with 291732 (Dioctyl orthophthalates) or 291734 (Other esters of orthophthalic acid), which are the finished plasticizers produced from the anhydride rather than the anhydride itself.

FAQ

What is the HS code for phthalic anhydride?

The specific HS code for phthalic anhydride is 291735.

Is phthalic acid classified under the same code?

No, phthalic acid is classified under HS code 291739, as 291735 is specifically reserved for the anhydride form.