Hydrogen fluoride (hydrofluoric acid)

HS v2022 Code: 281111

About hydrogen fluoride (hydrofluoric acid)

HS code 281111 covers the classification of hydrogen fluoride, also known as hydrofluoric acid. This inorganic chemical compound is a critical industrial input, with widespread applications across various sectors. It plays a vital role in the production of fluorocarbons, aluminum, and semiconductor materials, making it an essential component of the broader chemical industry and its associated supply chains.

Production process

Hydrogen fluoride is typically produced through the reaction of calcium fluoride (fluorspar) with concentrated sulfuric acid. This process involves crushing and heating the raw materials, followed by the distillation and purification of the resulting hydrogen fluoride gas. The gas is then liquefied and packaged for distribution and use in various industrial processes.

Production inputs

The main inputs required for the production of hydrogen fluoride include calcium fluoride (fluorspar) as the primary raw material, as well as concentrated sulfuric acid, energy sources (such as natural gas or electricity) for heating, and specialized equipment like distillation columns and storage tanks. The production process also requires skilled labor and adherence to strict safety protocols due to the highly corrosive nature of the final product.

Production outputs

The primary output of HS code 281111 is hydrogen fluoride, which is then consumed by various downstream industries. This includes the production of 282520 Fluorides; fluorosilicates; fluoroaluminates, 290330 Halogenated derivatives of hydrocarbons, and 284410 Natural uranium and its compounds; alloys, dispersions, ceramic products and mixtures containing natural uranium or natural uranium compounds. Hydrogen fluoride is also used in the manufacturing of aluminum, the etching of glass and silicon, and the production of various other chemicals and materials.

Revisions to 281111

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 281111. The most recent 1 version of this code (281111) is in the HS v2022 system (this version):

This page shows the most recent version of code 281111.

Family tree for hydrogen fluoride (hydrofluoric acid)

    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/v2022/2811'>2811: Inorganic acids and other inorganic oxygen compounds of non-metals; n.e.c. in heading no. 2806 to 2810</a>"]
B --> C["<a href='/classifications/hs/v2022/281111'>281111: Hydrogen fluoride (hydrofluoric acid)</a>"]

    B --> D["<a href='/classifications/hs/v2022/281112'>281112: Hydrogen cyanide (hydrocyanic acid)</a>"]
B --> E["<a href='/classifications/hs/v2022/281119'>281119: Inorganic acids; other than hydrogen fluoride</a>"]
B --> F["<a href='/classifications/hs/v2022/281121'>281121: Carbon dioxide</a>"]
B --> G["<a href='/classifications/hs/v2022/281122'>281122: Silicon dioxide</a>"]
B --> H["<a href='/classifications/hs/v2022/281129'>281129: Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2</a>"]

    

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