Acids; aromatic polycarboxylic acids; phthalic anhydride

HS v2017 Code: 291735

About acids; aromatic polycarboxylic acids; phthalic anhydride

HS code 291735 covers a group of aromatic polycarboxylic acids, including phthalic anhydride, which are essential chemical compounds used in a wide range of industries. These acids and their derivatives play a crucial role in the production of plastics, resins, dyes, and various other important materials, making them a vital component of the global chemical industry.

Production process

The primary production technique for the chemicals under HS code 291735 is oxidation. Aromatic hydrocarbons, such as naphthalene or orthoxylene, are oxidized using air or other oxidizing agents to produce phthalic anhydride and other aromatic polycarboxylic acids. The resulting products are then further processed and refined to meet the specific requirements of various applications.

Production inputs

The main inputs required for the production of the chemicals under HS code 291735 include aromatic hydrocarbons, such as naphthalene or orthoxylene, as well as various oxidizing agents, catalysts, and other processing chemicals. Additionally, specialized production equipment, such as reactors, distillation columns, and purification systems, are essential for the manufacturing process.

Production outputs

The primary outputs of the industry covered by HS code 291735 are phthalic anhydride and other aromatic polycarboxylic acids. These chemicals are widely used in the production of 392010 plastics, 320611 dyes, 390120 resins, and a variety of other important materials. The outputs of this industry are often consumed by manufacturers in the 390690 plastics, 320611 dyes and pigments, and 390120 resins and coatings industries.

Revisions to 291735

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 291735. The most recent 1 version of this code (291735) is in the HS v2022 system:

This page shows a legacy version of code 291735 ( HS v2017).

Older versions

Family tree for acids; aromatic polycarboxylic acids; phthalic anhydride

    graph LR
    A["<a href='/classifications/hs/v2017/29'>29: Organic chemicals</a>"]
A --> B["<a href='/classifications/hs/v2017/2917'>2917: Acids; polycarboxylic acids, their anhydrides, halides, peroxides and peroxy-acids; their halogenated, sulphonated, nitrated or nitrosated derivatives</a>"]
B --> C["<a href='/classifications/hs/v2017/291735'>291735: Acids; aromatic polycarboxylic acids; phthalic anhydride</a>"]

    B --> D["<a href='/classifications/hs/v2017/291711'>291711: Acids; acyclic polycarboxylic acids; oxalic acid, its salts and esters</a>"]
B --> E["<a href='/classifications/hs/v2017/291712'>291712: Acids; acyclic polycarboxylic acids; adipic acid, its salts and esters</a>"]
B --> F["<a href='/classifications/hs/v2017/291713'>291713: Acids; acyclic polycarboxylic acids; azelaic acid, sebacic acid, their salts and esters</a>"]
B --> G["<a href='/classifications/hs/v2017/291714'>291714: Acids; acyclic polycarboxylic acids; maleic anhydride</a>"]
B --> H["<a href='/classifications/hs/v2017/291719'>291719: Acids; acyclic polycarboxylic acids; n.e.c. in item no. 2917.1</a>"]
B --> I["<a href='/classifications/hs/v2017/291720'>291720: Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives</a>"]
B --> J["<a href='/classifications/hs/v2017/291732'>291732: Acids; aromatic polycarboxylic acids; dioctyl orthophthalates</a>"]
B --> K["<a href='/classifications/hs/v2017/291733'>291733: Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates</a>"]
B --> L["<a href='/classifications/hs/v2017/291734'>291734: Acids; aromatic polycarboxylic acids; other esters of orthophthalic acids</a>"]
B --> M["<a href='/classifications/hs/v2017/291736'>291736: Acids; aromatic polycarboxylic acids; terephthalic acid and its salts</a>"]
B --> N["<a href='/classifications/hs/v2017/291737'>291737: Acids; aromatic polycarboxylic acids; dimethyl terephthalate</a>"]
B --> O["<a href='/classifications/hs/v2017/291739'>291739: Acids; aromatic polycarboxylic acids; n.e.c. in item no. 2917.3</a>"]

    

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