-- Silicon dioxide

HS v2007 Code: 281122

Chapter	Heading	Sub-heading
28	11	22

Code	281122
Version	HS v2007
Hierarchy Level	6
Datasource	WCO
Chapter	28
Heading	2811

Ancestor Codes: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes; Other inorganic acids and other inorganic oxygen compounds of non-metals.

This Code: -- Silicon dioxide

Sibling Codes (Nearest 4): -- Hydrogen fluoride (hydrofluoric acid); -- Other; -- Carbon dioxide; -- Other

Revisions to 281122

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 281122. The most recent 1 version of this code (281122) is in the HS v2022 system:

This page shows a legacy version of code 281122 ( HS v2007).

Newer versions

HS v2022 (Latest revision):
- 281122: Silicon dioxide
HS v2017 :
- 281122: Silicon dioxide
HS v2012 :
- 281122: -- Silicon dioxide

Older versions

HS v2002:
- 281122: -- Silicon dioxide

Family tree for -- silicon dioxide

    graph LR
    A["<a href='/classifications/hs/v2007/28'>28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes</a>"]
A --> B["<a href='/classifications/hs/v2007/2811'>2811: Other inorganic acids and other inorganic oxygen compounds of non-metals.</a>"]
B --> C["<a href='/classifications/hs/v2007/281122'>281122: --  Silicon dioxide</a>"]

    B --> D["<a href='/classifications/hs/v2007/281111'>281111: --  Hydrogen fluoride (hydrofluoric acid)</a>"]
B --> E["<a href='/classifications/hs/v2007/281119'>281119: --  Other</a>"]
B --> F["<a href='/classifications/hs/v2007/281121'>281121: --  Carbon dioxide</a>"]
B --> G["<a href='/classifications/hs/v2007/281129'>281129: --  Other</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 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