Alkali or alkali-earth metals; calcium
HS v2022 Code: 280512
About alkali or alkali-earth metals; calcium
HS code 280512 covers the classification of calcium, a vital alkali-earth metal with a wide range of industrial and commercial applications. Calcium is an essential element for many industries, from construction and agriculture to pharmaceuticals and electronics. Its importance in the global economy cannot be overstated, as it serves as a key input for a diverse array of products and processes.
Production process
Calcium is primarily produced through the electrolytic reduction of calcium oxide or calcium hydroxide. The process involves the electrolysis of molten calcium salts, such as calcium chloride, to extract the pure metal. Alternatively, calcium can be obtained by the thermal reduction of calcium oxide with a reducing agent, such as aluminum or carbon. These production methods yield high-purity calcium that can be further refined and processed to meet the specific requirements of various industries.
Production inputs
The main inputs required for the production of calcium under HS code 280512 include calcium-bearing ores or minerals, such as limestone, dolomite, or gypsum, as well as reducing agents like coke or charcoal. Additionally, the production process requires significant amounts of energy, typically in the form of electricity or heat, to facilitate the electrolytic or thermal reduction of the calcium compounds.
Production outputs
The primary output of HS code 280512 is pure calcium metal, which can be used in a variety of applications. Calcium is a key component in the production of 284016 calcium carbide, 283525 calcium cyanamide, and 283926 calcium hypochlorite, all of which are classified under different HS codes. Calcium is also widely used in the production of 252100 limestone flux, 281512 calcium hydroxide, and 252321 quicklime for construction, agriculture, and industrial applications.
Revisions to 280512
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 280512. The most recent 1 version of this code (280512) is in the HS v2022 system (this version):
This page shows the most recent version of code 280512.
Older versions
Family tree for alkali or alkali-earth metals; calcium
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/v2022/2805'>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/v2022/280512'>280512: Alkali or alkali-earth metals; calcium</a>"]
B --> D["<a href='/classifications/hs/v2022/280511'>280511: Alkali or alkali-earth metals; sodium</a>"]
B --> E["<a href='/classifications/hs/v2022/280519'>280519: Alkali or alkali-earth metals; other than sodium and calcium</a>"]
B --> F["<a href='/classifications/hs/v2022/280530'>280530: Earth-metals, rare; scandium and yttrium, whether or not intermixed or interalloyed</a>"]
B --> G["<a href='/classifications/hs/v2022/280540'>280540: Mercury</a>"]
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