Hydrofluoric Acid
IUPAC Name:Fluorane
Synonym
Caswell No. 484; Etching Acid; HFA; Fluorohydric Acid; Fluoric Acid; Hydrofluoric Acid; Aqueous Hydrogen Fluoride; EPA Pesticide Code: 45601
CAS No.:7664-39-3
Occurrence/Use
Catalyst, reactive solvent; etching glass and enamel; production of refrigerants, herbicides, plastics, and electrical components
Introduction
Hydrofluoric acid (HF) is an aqueous solution of hydrogen fluoride gas.
| Item |
Top-grade |
First grade |
Qualified product |
| HF-40 |
HF-70 |
HF-40 |
HF-55 |
HF-40 |
HF-55 |
| Appearance |
colorless transparent solution |
| Hydrogen fluoride %≥ |
40.0 |
70.0 |
40.0 |
55.0 |
40.0 |
55.0 |
| Fluorosilicic acid %≤ |
0.02 |
0.02 |
0.2 |
0.5 |
2.5 |
5.0 |
| Involatile acid(as H2SO4 ) %≤ |
0.02 |
0.02 |
0.05 |
0.08 |
1.0 |
2.0 |
At room temperature, HF appears as a colorless to light yellow, transparent, highly volatile liquid with a pungent odor. With a specific gravity of 0.98 (slightly lighter than water) and a boiling point of 19.4 °C, it is known for its ability to release white smoke when exposed to air. Solutions containing less than 60% hydrogen fluoride are colorless and fuming. Industrial products typically consist of 40-45% HF in aqueous solution.
HF has a distinct, pungent odor and reacts with sulfur trioxide, chlorosulfonic acid, halogenated aromatic hydrocarbons, alcohols, olefins, and hydrocarbons, producing ***-containing organic compounds. In water, it forms a highly corrosive, medium-intensity acid. It is extremely toxic, with the potential to cause severe skin ulceration. Careful handling is required due to its hazardous nature.
Inhalation of HF vapor can be fatal, necessitating strict safety protocols during use.
HF reacts with common metals, metal oxides, and hydroxides to form various metal fluoride salts, although less dramatically than hydrochloric acid. Gold, platinum, lead, paraffin, and certain plastics (such as polyethylene) are resistant and suitable for storage.
Strong Corrosiveness
HF erodes glass and silicates, producing gaseous silicon tetrafluoride, as shown in the reaction:
SiO2 + 4HF → H2O + SiF4 ↑
Due to this reactivity, HF cannot be stored in glass containers. It forms acid salts and is a monobasic acid capable of producing salts like NaHF2, KHF2, and NH4HF2, distinct from other halogen acids.
The Weak Acidity of Hydrofluoric Acid: Owing to the strong hydrogen-*** bond, HF does not completely ionize in water. Among hydrohalic acids, only HF is a weak acid with an ionization constant of 3.5 × 10^-4 and an apparent ionization degree of about 10% at 0.1 mol/L concentration. The ionization degree increases with concentration, unlike other weak electrolytes.
Our products are extensively utilized in semiconductor, photovoltaic, high-purity quartz sand, lithium battery electrolyte, stainless steel pickling, graphite purification, rare earth processing, screen thinning, glass production, electroplating, and other industries.
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Category: Acid
Product Name: Industrial Hydrofluoric Acid
Keywords: Hf Acid, Industrial Hydrofluoric Acid, Hydrofluoric Acid, CAS: 7664-39-3, Quartz Sand
Others: Industrial Grade CAS 7664-39-3 Hf Hydrofluoric Acid for Sale with Purity 40%
Introducing our premier Industrial Hydrofluoric Acid from Laiyang Kangte New Materials Co., Ltd. This high-quality acid solution, boasting a remarkable 40% purity, is engineered for excellence in various industrial applications. Its certified CAS number 7664-39-3 guarantees the product's authenticity and superior quality, ensuring optimal performance in your manufacturing processes.
Our hydrofluoric acid is indispensable for tasks such as glass etching, metal cleaning, and quartz sand processing. Trust in the consistent, industrial-grade quality of our product to meet and exceed your production requirements. Secure your supply of Hydrofluoric Acid today and experience seamless integration into your industrial operations.
Reliable Hydrofluoric Acid Supplier in China
Reliable Chemical Industry Supplier in China
Provide
Anhydrous hydrogen fluoride,
49% electronic hydrofluoric acid,
industrial hydrofluoric acid,
high purity hydrofluoric acid;
hydrofluosilicic acid
Accept customized orders
semiconductor fabrication&Stainless steel cleaning
Hydrofluoric acid is used to clean stainless steel
& Semiconductor wafer
Graphite industry
Hydrofluoric acid is used in the graphite industry
Glass thinning
Hydrofluoric acid can corrode glass and is used in various glass-thinning scenarios
Purify the high-purity quartz sand
Hydrofluoric acid can be used to pickle high-purity quartz sand for further purification
Production of refrigerant
Anhydrous hydrogen fluoride is an essential raw material for refrigerant production
Special hydrofluoric acid for the oil field
Hydrofluoric acid is also utilized during oil extraction
We have over 20 years of professional service experience in the chemical industry
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IBC Tank Solutions: 20 tons; liquid format for bulk needs.
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