Thiosulphates

HS v2022 Code: 283230

About thiosulphates

HS code 283230 covers thiosulphates, a class of inorganic chemical compounds that play a vital role in various industrial processes and applications. Thiosulphates are widely used in the textile, photography, and mining industries, as well as in the production of other chemicals. Their importance in the broader economy stems from their versatility and their ability to facilitate essential chemical reactions and processes.

Production process

Thiosulphates are typically produced through the reaction of sulfur dioxide (SO2) with an alkali metal hydroxide, such as sodium hydroxide (NaOH) or calcium hydroxide (Ca(OH)2). The resulting solution is then treated with sulfur to form the thiosulphate compound. The specific production techniques may vary depending on the desired thiosulphate product and the scale of production.

Production inputs

The main inputs required for the production of thiosulphates include sulfur dioxide (SO2), alkali metal hydroxides (e.g., NaOH, Ca(OH)2), and sulfur. Additionally, the production process may require specialized equipment, such as reactors, filtration systems, and drying equipment, to ensure the efficient and consistent manufacture of thiosulphates.

Production outputs

The primary output of HS code 283230 is thiosulphates, which are then consumed by various industries. Thiosulphates find applications in the 540000 Textile Industry, where they are used as reducing agents, bleaching agents, and dye fixatives. They are also used in the 370000 Photography Industry as fixing agents and in the 250000 Mining Industry as flotation agents. Thiosulphates may also be used as intermediates in the production of other chemical compounds, such as 283210 Sulphites and 283220 Sulphates.

Revisions to 283230

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 283230. The most recent 1 version of this code (283230) is in the HS v2022 system (this version):

This page shows the most recent version of code 283230.

Older versions

Family tree for thiosulphates

    graph LR
    A["<a href='/classifications/hs/v2022/28'>28: Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes</a>"]
A --> B["<a href='/classifications/hs/v2022/2832'>2832: Sulphites; thiosulphates</a>"]
B --> C["<a href='/classifications/hs/v2022/283230'>283230: Thiosulphates</a>"]

    B --> D["<a href='/classifications/hs/v2022/283210'>283210: Sulphites; of sodium</a>"]
B --> E["<a href='/classifications/hs/v2022/283220'>283220: Sulphites; other than of sodium</a>"]

    

    %% Color coordination by level

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    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
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class B level4
class C level6
class D level6
class E level6

  class C highlight

  %% class A level1
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  %% class C highlight