Alums

HS v2022 Code: 283330

About alums

HS code 283330 covers the classification of 'Alums'. Alums are a group of chemical compounds that have a wide range of industrial applications, particularly in the fields of water treatment, paper manufacturing, and textile processing. As an important class of inorganic salts, alums play a crucial role in various industrial processes, contributing to the broader economy through their versatility and utility.

Production process

Alums are typically produced through a chemical reaction between an aluminum compound, such as aluminum sulfate or aluminum hydroxide, and an appropriate acid or base. The specific production techniques can vary depending on the desired type of alum, but the general process often involves dissolving the aluminum compound, adjusting the pH, and then crystallizing the alum compound. The resulting crystals are then dried and packaged for distribution.

Production inputs

The main inputs required for the production of alums include aluminum-containing raw materials, such as bauxite or aluminum hydroxide, as well as various acids and bases used to control the pH during the production process. Additionally, energy sources, such as heat or electricity, are necessary to facilitate the chemical reactions and crystallization steps.

Production outputs

The primary output of HS code 283330 is the alum compound itself, which can be used in a variety of applications. Alums find widespread use in water treatment processes, where they act as coagulants and flocculants, helping to remove impurities from water. They are also utilized in the paper industry as sizing agents and in the textile industry as mordants and dyes. Other industries that may consume the output of this code include 283320 Aluminum hydroxide, 281820 (Potassium hydroxide (caustic potash)), and 281410 Anhydrous ammonia.

Revisions to 283330

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 283330. The most recent 1 version of this code (283330) is in the HS v2022 system (this version):

This page shows the most recent version of code 283330.

Older versions

Family tree for alums

    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/v2022/2833'>2833: Sulphates; alums; peroxosulphates (persulphates)</a>"]
B --> C["<a href='/classifications/hs/v2022/283330'>283330: Alums</a>"]

    B --> D["<a href='/classifications/hs/v2022/283311'>283311: Sodium sulphates; disodium sulphate</a>"]
B --> E["<a href='/classifications/hs/v2022/283319'>283319: Sodium sulphates; other than disodium sulphate</a>"]
B --> F["<a href='/classifications/hs/v2022/283321'>283321: Sulphates; of magnesium</a>"]
B --> G["<a href='/classifications/hs/v2022/283322'>283322: Sulphates; of aluminium</a>"]
B --> H["<a href='/classifications/hs/v2022/283324'>283324: Sulphates; of nickel</a>"]
B --> I["<a href='/classifications/hs/v2022/283325'>283325: Sulphates; of copper</a>"]
B --> J["<a href='/classifications/hs/v2022/283327'>283327: Sulphates; of barium</a>"]
B --> K["<a href='/classifications/hs/v2022/283329'>283329: Sulphates; n.e.c. in item no. 2833.2</a>"]
B --> L["<a href='/classifications/hs/v2022/283340'>283340: Peroxosulphates (persulphates)</a>"]

    

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class G level6
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