Silicon; containing by weight less than 99.99% of silicon

HS v2017 Code: 280469

About silicon; containing by weight less than 99.99% of silicon

HS code 280469 covers silicon containing less than 99.99% of silicon by weight. Silicon is a critical element in the production of various electronic and industrial products, playing a vital role in the global economy. This type of silicon is widely used in the manufacturing of semiconductors, solar cells, and a range of other applications that require high-purity silicon materials.

Production process

The production of silicon with less than 99.99% purity typically involves the reduction of silicon dioxide (SiO2) using carbon or other reducing agents. This process, known as the Siemens process, involves the decomposition of silicon tetrachloride (SiCl4) in a high-temperature reactor, resulting in the deposition of silicon on a heated rod. The silicon is then purified through a series of chemical and physical processes to achieve the desired purity level.

Production inputs

The main inputs required for the production of silicon under HS code 280469 include silicon dioxide (SiO2) as the raw material, as well as reducing agents such as carbon, coke, or coal. Additionally, the process requires specialized equipment, including high-temperature reactors, purification systems, and other supporting infrastructure.

Production outputs

The primary output of this industry is silicon with a purity level of less than 99.99%. This silicon is widely used in the production of 854231 Diodes, 854239 Transistors, and other semiconductor devices, as well as in the manufacture of 854140 Photosensitive semiconductor devices, including photovoltaic cells. The silicon produced under this code may also be used as an input for the production of other silicon-based materials and products.

Revisions to 280469

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 280469. The most recent 1 version of this code (280469) is in the HS v2022 system:

This page shows a legacy version of code 280469 ( HS v2017).

Older versions

Family tree for silicon; containing by weight less than 99.99% of silicon

    graph LR
    A["<a href='/classifications/hs/v2017/28'>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/v2017/2804'>2804: Hydrogen, rare gases and other non-metals</a>"]
B --> C["<a href='/classifications/hs/v2017/280469'>280469: Silicon; containing by weight less than 99.99% of silicon</a>"]

    B --> D["<a href='/classifications/hs/v2017/280410'>280410: Hydrogen</a>"]
B --> E["<a href='/classifications/hs/v2017/280421'>280421: Gases, rare; argon</a>"]
B --> F["<a href='/classifications/hs/v2017/280429'>280429: Gases, rare; other than argon</a>"]
B --> G["<a href='/classifications/hs/v2017/280430'>280430: Nitrogen</a>"]
B --> H["<a href='/classifications/hs/v2017/280440'>280440: Oxygen</a>"]
B --> I["<a href='/classifications/hs/v2017/280450'>280450: Boron; tellurium</a>"]
B --> J["<a href='/classifications/hs/v2017/280461'>280461: Silicon; containing by weight not less than 99.99% of silicon</a>"]
B --> K["<a href='/classifications/hs/v2017/280470'>280470: Phosphorus</a>"]
B --> L["<a href='/classifications/hs/v2017/280480'>280480: Arsenic</a>"]
B --> M["<a href='/classifications/hs/v2017/280490'>280490: Selenium</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 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