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

HS v2017 Code: 290723

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

HS code 290723 covers the classification of polyphenols, including the important chemical compound 4,4'-isopropylidenediphenol, also known as bisphenol A or diphenylolpropane. These substances are widely used in the production of plastics, resins, and other industrial materials, making them a crucial part of the global chemical industry. Understanding the production, inputs, and applications of these polyphenols is essential for businesses involved in the import/export of chemical products.

Production process

The primary production technique for polyphenols like bisphenol A involves the condensation reaction between phenol and acetone, catalyzed by an acid. This process yields the desired 4,4'-isopropylidenediphenol, which is then purified and processed further for various applications. Manufacturers may also use alternative methods, such as the reaction of phenol with other ketones or the use of different catalysts, to produce specialized polyphenol derivatives.

Production inputs

The main inputs required for the production of polyphenols under HS code 290723 include phenol, acetone, and various catalysts or reagents. Specialized equipment, such as reactors, distillation columns, and purification systems, are also essential for the efficient and high-quality production of these chemicals. Additionally, energy sources, such as electricity or steam, are needed to power the manufacturing processes.

Production outputs

The primary output of HS code 290723 is 4,4'-isopropylidenediphenol, also known as bisphenol A, which is a widely used chemical building block. This polyphenol is then consumed by other industries, such as the production of 392010 Polymers of ethylene, in primary forms, 392020 Polymers of propylene or of other olefins, in primary forms, and 392030 Polymers of styrene, in primary forms, where it is used as a key ingredient in the manufacture of various plastics, resins, and other materials.

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 page shows a legacy version of code 290723 ( HS v2017).

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

    graph LR
    A["<a href='/classifications/hs/v2017/29'>29: Organic chemicals</a>"]
A --> B["<a href='/classifications/hs/v2017/2907'>2907: Phenols; monophenols, polyphenols, and phenol-alcohols</a>"]
B --> C["<a href='/classifications/hs/v2017/290723'>290723: Polyphenols; 4,4'-isopropylidenediphenol (bisphenol A, diphenylolpropane) and its salts</a>"]

    B --> D["<a href='/classifications/hs/v2017/290711'>290711: Monophenols; phenol (hydroxybenzene) and its salts</a>"]
B --> E["<a href='/classifications/hs/v2017/290712'>290712: Monophenols; cresols and their salts</a>"]
B --> F["<a href='/classifications/hs/v2017/290713'>290713: Monophenols; octylphenol, nonylphenol and their isomers, salts thereof</a>"]
B --> G["<a href='/classifications/hs/v2017/290715'>290715: Monophenols; naphthols and their salts</a>"]
B --> H["<a href='/classifications/hs/v2017/290719'>290719: Monophenols; n.e.c. in item no. 2907.1</a>"]
B --> I["<a href='/classifications/hs/v2017/290721'>290721: Polyphenols; resorcinol and its salts</a>"]
B --> J["<a href='/classifications/hs/v2017/290722'>290722: Polyphenols; hydroquinone (quinol) and its salts</a>"]
B --> K["<a href='/classifications/hs/v2017/290729'>290729: Phenol-alcohols and polyphenols n.e.c. in item number 2907.2</a>"]

    

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