Siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less

HS v2022 Code: 251200

About siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less

HS code 251200 covers a group of naturally occurring siliceous materials, including kieselguhr, tripolite, and diatomite, as well as other similar siliceous earths. These materials are widely used in a variety of industries, from filtration and absorbents to fillers and abrasives, making them an important part of the global industrial landscape.

Production process

Siliceous fossil meals and similar siliceous earths are typically extracted from natural deposits, often through mining or quarrying operations. The raw materials are then processed, which may involve drying, grinding, and in some cases, calcination (heating to high temperatures). The specific production techniques can vary depending on the intended use and the characteristics of the particular siliceous material.

Production inputs

The primary inputs for this industry are the natural deposits of siliceous materials, such as kieselguhr, tripolite, and diatomite. Mining and quarrying equipment, as well as processing machinery like dryers and grinders, are also essential inputs. Energy sources, such as electricity or fuel, are required for the various processing steps.

Production outputs

The main outputs of this industry are the processed siliceous fossil meals and similar siliceous earths, which are then used as inputs for a wide range of other industries. These materials may be used in the production of 282010 Activated carbon, 320611 Pigments and preparations based on titanium dioxide, 340211 Organic surface-active agents, and 701939 Other glass fibers, among others.

Revisions to 251200

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 251200. The most recent 1 version of this code (251200) is in the HS v2022 system (this version):

This page shows the most recent version of code 251200.

Family tree for siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less

    graph LR
    A["<a href='/classifications/hs/v2022/25'>25: Salt; sulphur; earths, stone; plastering materials, lime and cement</a>"]
A --> B["<a href='/classifications/hs/v2022/2512'>2512: Siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less</a>"]
B --> C["<a href='/classifications/hs/v2022/251200'>251200: Siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less</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 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