Acids; aromatic polycarboxylic acids; phthalic anhydride

HS v2022 Code: 291735

About acids; aromatic polycarboxylic acids; phthalic anhydride

HS code 291735 covers a diverse range of aromatic polycarboxylic acids, including phthalic anhydride, which are essential chemicals used in the production of a wide variety of products. These chemicals play a crucial role in the manufacturing of plastics, resins, dyes, and other important industrial and consumer goods, making them a vital component of the global chemical industry.

Production process

The production of the chemicals covered under HS code 291735 typically involves the oxidation of aromatic hydrocarbons, such as naphthalene or orthoxylene, using various catalysts and reaction conditions. The specific production techniques may vary depending on the target compound, but often include processes like catalytic air oxidation, hydrolysis, and distillation to obtain the desired purity and quality of the final product.

Production inputs

The main inputs required for the production of the chemicals under HS code 291735 include aromatic hydrocarbons, such as 271011 naphtha or 271012 xylene, as well as various catalysts, solvents, and energy sources. Specialized production equipment, such as reactors, distillation columns, and purification systems, are also essential for the manufacturing process.

Production outputs

The chemicals classified under HS code 291735 are widely used as intermediates in the production of a diverse range of products. Phthalic anhydride, for example, is a key ingredient in the manufacture of 390430 plasticizers, 390791 unsaturated polyester resins, and 320611 pigments. Other aromatic polycarboxylic acids may find applications in the production of 292017 dyes, 293361 pharmaceutical products, and various other industrial and consumer goods.

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 version):

This page shows the most recent version of code 291735.

Family tree for acids; aromatic polycarboxylic acids; phthalic anhydride

    graph LR
    A["<a href='/classifications/hs/v2022/29'>29: Organic chemicals</a>"]
A --> B["<a href='/classifications/hs/v2022/2917'>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/v2022/291735'>291735: Acids; aromatic polycarboxylic acids; phthalic anhydride</a>"]

    B --> D["<a href='/classifications/hs/v2022/291711'>291711: Acids; acyclic polycarboxylic acids; oxalic acid, its salts and esters</a>"]
B --> E["<a href='/classifications/hs/v2022/291712'>291712: Acids; acyclic polycarboxylic acids; adipic acid, its salts and esters</a>"]
B --> F["<a href='/classifications/hs/v2022/291713'>291713: Acids; acyclic polycarboxylic acids; azelaic acid, sebacic acid, their salts and esters</a>"]
B --> G["<a href='/classifications/hs/v2022/291714'>291714: Acids; acyclic polycarboxylic acids; maleic anhydride</a>"]
B --> H["<a href='/classifications/hs/v2022/291719'>291719: Acids; acyclic polycarboxylic acids; n.e.c. in item no. 2917.1</a>"]
B --> I["<a href='/classifications/hs/v2022/291720'>291720: Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives</a>"]
B --> J["<a href='/classifications/hs/v2022/291732'>291732: Acids; aromatic polycarboxylic acids; dioctyl orthophthalates</a>"]
B --> K["<a href='/classifications/hs/v2022/291733'>291733: Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates</a>"]
B --> L["<a href='/classifications/hs/v2022/291734'>291734: Acids; aromatic polycarboxylic acids; other esters of orthophthalic acids</a>"]
B --> M["<a href='/classifications/hs/v2022/291736'>291736: Acids; aromatic polycarboxylic acids; terephthalic acid and its salts</a>"]
B --> N["<a href='/classifications/hs/v2022/291737'>291737: Acids; aromatic polycarboxylic acids; dimethyl terephthalate</a>"]
B --> O["<a href='/classifications/hs/v2022/291739'>291739: Acids; aromatic polycarboxylic acids; n.e.c. in item no. 2917.3</a>"]

    

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