Acids; aromatic polycarboxylic acids; terephthalic acid and its salts
HS v2017 Code: 291736
About acids; aromatic polycarboxylic acids; terephthalic acid and its salts
HS code 291736 covers a group of aromatic polycarboxylic acids, with terephthalic acid and its salts being the most prominent. These chemicals play a crucial role in the production of various industrial and consumer goods, including plastics, textiles, and pharmaceuticals. As a key component in the manufacturing of polyester, terephthalic acid is an essential material for the global textile and packaging industries, making it a vital part of the broader chemical and manufacturing sectors.
Production process
Terephthalic acid is primarily produced through the oxidation of paraxylene, a hydrocarbon derived from crude oil. The process typically involves a series of chemical reactions, including the initial oxidation of paraxylene to produce crude terephthalic acid, followed by purification steps to remove impurities and yield the final product. Other aromatic polycarboxylic acids within this HS code may be produced through similar oxidation processes, depending on the specific starting materials and reaction conditions.
Production inputs
The main inputs required for the production of terephthalic acid and other aromatic polycarboxylic acids under HS code 291736 include paraxylene or other aromatic hydrocarbon feedstocks, as well as various catalysts, solvents, and other chemicals necessary for the oxidation and purification processes. Additionally, specialized production equipment, such as reactors, distillation columns, and filtration systems, are essential for the manufacturing of these chemicals.
Production outputs
The primary output of HS code 291736 is terephthalic acid and its salts, which are widely used in the production of 392010 (polyethylene terephthalate (PET)) and other polyester materials. These polyester products are then consumed by various industries, including 550320 synthetic filament tow, 392330 carboys, bottles, flasks and similar articles, and 300490 medicaments. Other aromatic polycarboxylic acids within this code may find applications in the production of plasticizers, dyes, and pharmaceutical intermediates.
Revisions to 291736
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 291736. The most recent 1 version of this code (291736) is in the HS v2022 system:
This page shows a legacy version of code 291736 ( HS v2017).
Newer versions
- HS v2022 (Latest revision):
Older versions
Family tree for acids; aromatic polycarboxylic acids; terephthalic acid and its salts
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/v2017/291736'>291736: Acids; aromatic polycarboxylic acids; terephthalic acid and its salts</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/v2017/291735'>291735: Acids; aromatic polycarboxylic acids; phthalic anhydride</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>"] %% Color coordination by level classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px %% Apply classes class A level2 class B level4 class C level6 class D level6 class E level6 class F level6 class G level6 class H level6 class I level6 class J level6 class K level6 class L level6 class M level6 class N level6 class O level6 class C highlight %% class A level1 %% class B,C level2 %% class D,E,F,G,H,I level2 %% class J,K,L,M,N,O,P level3 %% class C highlight