1. Science / Technology

What you need to know about hydrofluoric acid

Disclaimer: This is a user generated content submitted by a member of the WriteUpCafe Community. The views and writings here reflect that of the author and not of WriteUpCafe. If you have any complaints regarding this post kindly report it to us.

Commercially, hydrofluoric acid in an anhydrous state can be purchased, as well as aqueous solutions of different concentrations. At higher concentrations, HF is a colorless gas or smoky liquid. HF can be referred to as hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790), or hydrofluoric acid. The identification number is CAS number 7664-39-3, UN: 1052 or RTECS: MW7875000. The main manufacturers/importers are DuPont (United States), Allied Forces (United States), and Honeywell (United States).

Its physical properties are:

Molecular weight: 10

Boiling point: Gas with a temperature above 19 ° C

Automatic ignition: not relevant

Steam pressure: 150mm (70% solution, 26.7 ℃); 70mm (70% solution, 20.0 ° C)

Solubility: Aqueous solution to 70%

Explosive limit: Not applicable – not flammable (if the container is in fire conditions and there is a BLEVE hazard)

Ship name: Anhydrous hydrogen fluoride (1052), hydrofluoric acid, strength not exceeding 60% (1790)

Identification numbers: 1052 (anhydrous hydrogen fluoride) (Guide 125), 1790 (hydrofluoric acid) (Guide 157)

Hazard level or classification: 8 (1052)

Supplementary hazard level or classification: 6.1, inhalation hazard (1790)

Label: Corrosive, Toxic (Toxic) (1052), Corrosive, Toxic (Toxic), Inhalation Hazard (1790)

Hydrogen fluoride is used in solution form for glass and metal etching, industrial and household cleaning and rust removal agents, and in the manufacturing of electronic products. Full strength, used to manufacture high octane fuel in refineries. The other main industrial uses of hydrogen fluoride include the synthesis of fluorocarbon compounds (such as Freon and Teflon) and the production of aluminum fluoride and synthetic cryolite for aluminum smelting. It is also used to extract uranium for nuclear fuel, manufacture various organic chemicals, produce stainless steel, and various other applications, such as:

Propellants and solvents

Pesticide and fertilizer production

Manufacturing and reduction of chlorides

Brewery controlled fermentation

Used in the textile industry to remove stains

Leather industry for leather making

Drug and dye production

Semiconductor manufacturing.

The current household uses include:

Rust remover

Aluminum electroplating

Heavy duty cleaning agents.

The hazards of hydrofluoric acid

Although hydrogen fluoride is considered a weak acid, it is one of the most dangerous inorganic acids known. Due to the unique properties of this acid, as long as 1% of the body surface area (BSA), or approximately 25 square inches (about the size of the palm), can cause fatal burns.


Welcome to WriteUpCafe Community

Join our community to engage with fellow bloggers and increase the visibility of your blog.
Join WriteUpCafe