Alkaline-earth metals :-- Calcium

HS v1996 Code: 280521

Revisions to 280521

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 280521. The most recent 1 version of this code (280521) is in the HS v2022 system:

This page shows a legacy version of code 280521 ( HS v1996).

Family tree for alkaline-earth metals :-- calcium

    graph LR
    A["<a href='/classifications/hs/v1996/28'>28: Inorgn chem; compds of prec mtl,  radioact elements etc</a>"]
A --> B["<a href='/classifications/hs/v1996/2805'>2805: Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury.</a>"]
B --> C["<a href='/classifications/hs/v1996/280521'>280521: Alkaline-earth metals :-- Calcium</a>"]

    B --> D["<a href='/classifications/hs/v1996/280511'>280511: Alkali metals :-- Sodium</a>"]
B --> E["<a href='/classifications/hs/v1996/280519'>280519: Alkali metals :-- Other</a>"]
B --> F["<a href='/classifications/hs/v1996/280522'>280522: Alkaline-earth metals :-- Strontium and barium</a>"]
B --> G["<a href='/classifications/hs/v1996/280530'>280530: Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed</a>"]
B --> H["<a href='/classifications/hs/v1996/280540'>280540: Mercury</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 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