Hydrogen fluoride (hydrofluoric acid)

HS v2017 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 applications spanning various sectors, including chemical manufacturing, semiconductor production, and metal processing. As a highly reactive and corrosive substance, hydrogen fluoride plays a vital role in the broader chemical industry and the global economy.

Production process

Hydrogen fluoride is primarily produced through the reaction of calcium fluoride (fluorspar) with sulfuric acid. This process involves crushing and heating the raw materials, followed by the distillation of the resulting hydrogen fluoride gas. The gas is then condensed and purified to obtain the final hydrofluoric acid product.

Production inputs

The main inputs required for the production of hydrogen fluoride include calcium fluoride (fluorspar) as the primary raw material, as well as sulfuric acid, energy sources (such as natural gas or electricity), and specialized equipment like reactors, distillation columns, and condensers. Additionally, the production process may require water, catalysts, and various safety and pollution control systems.

Production outputs

The primary output of HS code 281111 is hydrofluoric acid, which is then consumed by a range of industries, including 281000 Inorganic chemicals, 282000 Organic chemicals, and 284000 Radioactive chemicals. Hydrofluoric acid is a key input for the production of fluorocarbons, fluoropolymers, and various fluorinated compounds, which are widely used in industries such as 290000 Organic chemicals, 390000 Plastics and rubber, and 850000 Electrical machinery and equipment.

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 page shows a legacy version of code 281111 ( HS v2017).

Newer versions

Family tree for hydrogen fluoride (hydrofluoric acid)

    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/v2017/2811'>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/v2017/281111'>281111: Hydrogen fluoride (hydrofluoric acid)</a>"]

    B --> D["<a href='/classifications/hs/v2017/281112'>281112: Hydrogen cyanide (hydrocyanic acid)</a>"]
B --> E["<a href='/classifications/hs/v2017/281119'>281119: Inorganic acids; other than hydrogen fluoride</a>"]
B --> F["<a href='/classifications/hs/v2017/281121'>281121: Carbon dioxide</a>"]
B --> G["<a href='/classifications/hs/v2017/281122'>281122: Silicon dioxide</a>"]
B --> H["<a href='/classifications/hs/v2017/281129'>281129: Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2</a>"]

    

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