Polyphenols; 4,4'-isopropylidenediphenol (bisphenol A, diphenylolpropane) and its salts

HS v2022 Code: 290723

About polyphenols; 4,4'-isopropylidenediphenol (bisphenol a, diphenylolpropane) and its salts

HS code 290723 covers the production and trade of polyphenols, specifically 4,4'-isopropylidenediphenol (also known as bisphenol A or diphenylolpropane) and its salts. These chemicals are widely used in the manufacturing of various products, making them an important part of the global chemical industry. Their applications span a diverse range of sectors, from plastics and resins to coatings and adhesives, contributing significantly to the broader economy.

Production process

The production of polyphenols and bisphenol A typically involves the condensation reaction between phenol and acetone, catalyzed by an acid. This process results in the formation of the bisphenol A molecule, which is then purified and processed further to obtain the desired product specifications. Manufacturers may also employ various separation and purification techniques, such as distillation, crystallization, or ion exchange, to ensure the quality and purity of the final product.

Production inputs

The main inputs required for the production of polyphenols and bisphenol A include phenol, acetone, and various catalysts and solvents. Specialized equipment, such as reactors, distillation columns, and crystallizers, are also essential for the manufacturing process. Additionally, energy sources, such as steam or electricity, are needed to power the production facilities.

Production outputs

The primary output of HS code 290723 is polyphenols, including bisphenol A and its salts. These chemicals are widely used as monomers in the production of 390610 Polyamides, 390720 Polyethers, and 390750 Alkyd resins, among other applications. The outputs of this industry are crucial inputs for various downstream industries, such as the plastics, coatings, and adhesives sectors.

Revisions to 290723

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 290723. The most recent 1 version of this code (290723) is in the HS v2022 system (this version):

This page shows the most recent version of code 290723.

Family tree for polyphenols; 4,4'-isopropylidenediphenol (bisphenol a, diphenylolpropane) and its salts

    graph LR
    A["<a href='/classifications/hs/v2022/29'>29: Organic chemicals</a>"]
A --> B["<a href='/classifications/hs/v2022/2907'>2907: Phenols; monophenols, polyphenols, and phenol-alcohols</a>"]
B --> C["<a href='/classifications/hs/v2022/290723'>290723: Polyphenols; 4,4'-isopropylidenediphenol (bisphenol A, diphenylolpropane) and its salts</a>"]

    B --> D["<a href='/classifications/hs/v2022/290711'>290711: Monophenols; phenol (hydroxybenzene) and its salts</a>"]
B --> E["<a href='/classifications/hs/v2022/290712'>290712: Monophenols; cresols and their salts</a>"]
B --> F["<a href='/classifications/hs/v2022/290713'>290713: Monophenols; octylphenol, nonylphenol and their isomers, salts thereof</a>"]
B --> G["<a href='/classifications/hs/v2022/290715'>290715: Monophenols; naphthols and their salts</a>"]
B --> H["<a href='/classifications/hs/v2022/290719'>290719: Monophenols; n.e.c. in item no. 2907.1</a>"]
B --> I["<a href='/classifications/hs/v2022/290721'>290721: Polyphenols; resorcinol and its salts</a>"]
B --> J["<a href='/classifications/hs/v2022/290722'>290722: Polyphenols; hydroquinone (quinol) and its salts</a>"]
B --> K["<a href='/classifications/hs/v2022/290729'>290729: Phenol-alcohols and polyphenols n.e.c. in item number 2907.2</a>"]

    

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