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Hydrogen fluoride CAS:7664-39-3

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CAS No.:

7664-39-3

Grade:

Industrail Grade

Content:

99%

Port:

SHANGHAI

Brand:

Orient

Packaging:

25L, 200L, 1000L, customized

Price valid (until):

2025-12-26

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Qingdao Orient Chemical Co.,LTD

Company Type:

Trader

Location:

China

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Main Products:

pharmaceutical intermediates,peptides,electronic chemicals

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Product Description
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Inquiry History

Description

Hydrogen fluoride Chemical Properties

Melting point	-35°C
Boiling point	105°C
density	1.15 g/mL at 25 °C(lit.)
vapor density	1.27 (vs air)
vapor pressure	25 mm Hg ( 20 °C)
Fp	112°C
storage temp.	Store at +5°C to +30°C.
solubility	very soluble in H2O, ethanol; soluble in ethyl ether
pka	3.17(at 25℃)
form	Liquid, Double Sub-Boiling Quartz Distillation
Specific Gravity	1.15
color	APHA: ≤10
Odor	Acrid, irritating odor
PH	3.27(1 mM solution);2.65(10 mM solution);2.12(100 mM solution)
PH Range	1
Water Solubility	soluble
Sensitive	Hygroscopic
Merck	14,4790
Exposure limits	Ceiling limit 3 ppm (～2.5 mg/m³) as F (ACGIH); TWA 3 ppm (MSHA and OSHA).
Dielectric constant	17.0（-73℃）
Stability:	Stable. Hygroscopic. Incompatible with glass, alkali metals, light metals, alkaline earth metals
LogP	0.1 at 20℃
CAS DataBase Reference	7664-39-3(CAS DataBase Reference)
NIST Chemistry Reference	Hydrogen fluoride(7664-39-3)
EPA Substance Registry System	Hydrofluoric acid (7664-39-3)

Hydrogen fluoride Usage And Synthesis

Product description	Hydrofluoric acid (HF) is an aqueous solution of hydrogen fluoride gas. At room temperature, it appears as colorless transparent to light yellow smoke liquid with pungent odor. It has a specific gravity of 0.98 which is slightly lighter than water. It has a boiling point of 19.4 °C, being highly volatile. It can release white smoke once placed in air. The aqueous solution containing less than 60% hydrogen fluoride appears as a colorless clear fuming liquid. Industrial products are usually aqueous solution containing 40 to 45% HF. It has pungent odor. It can react with sulfur trioxide or chlorosulfonic acid to generate fluoride sulfonic acid, and can react with halogenated aromatic hydrocarbons, alcohols, olefins, hydrocarbons to generate fluorine-containing organic compound. When being dissolved in water, it can produce highly corrosive acid, being medium-intensity acid. It is extremely smelly, being very toxic and is prone to cause ulceration when get touch with the skin with a severe extent being larger than any acids. If inhaled of its vapor, it can have fatal effects, thus strict attention should paid during usage. 1. Hydrofluoric acid can also react with general metals, metal oxides, and hydroxide, generating a variety of metal fluoride salts, but the effect is not as dramatic as hydrochloric acid. Gold, platinum, lead, paraffin and some plastics (polyethylene, etc.) does not react with it and thus being able to be used as containers. 2. Strong corrosiveness: it can erode glass and silicate to produce gaseous silicon tetrafluoride. The reaction is as follows: SiO2 + 4HF → H2O + SiF4 ↑, glass is a silicon compound so the hydrofluoric acid can’t be put into glass containers. Hydrofluoric acid can form acid salt, hydrofluoric acid is a monobasic acid, but can produce a series of acid salts such as NaHF2, KHF2, NH4HF2, which are the other three kinds of halogen acid. 4. The weak acidity of hydrofluoric acid; because of the strong binding capability of hydrogen atom with fluorine atom, hydrofluoric acid can’t be completely dissociated in the water. In the hydrohalic acid, only hydrofluoric acid is weak acid (its ionization constant is 3.5 × 10 ^-4; its apparent ionization degree is about 10% at a concentration of 0.1mo1.L^-1, therefore, HF can reluctantly taken as a kind of strong acid. The ionization degree at high concentration is higher than that at low concentration. This property is different from other kinds of general weak electrolytes).
Chemical Properties	It appears as colorless fuming liquid. It is intensively exothermic when being dissolved in water and further become hydrofluoric acid.
Uses	Hydrogen fluoride is the most important compound of fluorine. Anhydrous hydrogen fluoride is used in the production of most fluorine-containing chemicals. It is used in the production of refrigerants, herbicides, pharmaceuticals, high-octane gasoline, aluminum, plastics, electrical components, and fluorescent light bulbs. Aqueous hydrofluoric acid is used in stainless steel pickling, glass etching, metalcoatings, exotic metal extraction, and quartz purification(Hance et al. 1997).The most important use of hydrogen fluoride is in the production of fluorocarbon chemicals, including hydrofluorocarbons, hydrofluorochlorocarbons, and fluoropolymers; 60% of production is used for this purpose. Demand for hydrogen fluoride for fluorocarbons, broadly used as refrigerants, is increasing as a nonchlorinated alternative to ozone-depleting chlorofluorocarbons.(Production of fluorocarbons uses more hydrogen fluoride than production of chlorofluorocarbons.) The next most important uses of hydrogen fluoride are:chemical derivatives,18%; aluminum manufacturing,6%; stainless steel pickling,5%; petroleum alkylation catalysts, 4%; and uranium chemicals production,3%.Miscellaneous other uses include glassetching, herbicides, and rare metals(CMR 2002).Generally, the aluminum industry consumes 10-40 kg of fluoride per metric ton of aluminum produced.The AlF, used in aluminum reduction cells may be produced directly from acid-grade fluorspar or byproduct fluorosilicic acid, rather than from hydrogen fluoride. Anhydrous hydrogen fluoride is used as a catalyst in the petroleum alkylation, a process that increases the octane rating of petroleum. In uranium chemicals production, hydrogen fluoride is used to convert uranium oxide(yellow cake,U3O8) to UF4. before further fluorination to UF6.
Health Hazards	Hydrofluoric acid has irritating smell and acute toxicity, belonging to the medium strength & slightly weak acid. It is corrosive. It is commonly used in the manufacture of fluorocarbon, sodium fluoride, aluminum fluoride, uranium hexafluoride and cryolite and other organic or inorganic fluorine compounds. It can be applied to the pickling of stainless steel and non-ferrous metal. The semiconductor industry take it as a cleaning agent; glass etching industry as its etchant; the steel industry take it as a surface rust removing agent; the petrochemical industry take it as a catalyst; the cleaning services take it as a dirt cleaning agent or as an external wall cleaning agent. For professionals that are exposure to hydrofluoric acid in the daily work, improper use may cause non-negligible harm to the human body. Its exposure approaches include the skin and mucous membranes contact, respiratory inhalation and gastrointestinal uptake. Skin, if in contact with a over 50% concentrations of hydrofluoric acid, will immediately get painful feeling, whitening, swelling reaction. Blister can occur in 1 to 2 hours and the necrosis and ulceration can occur within 6 to 24 hours. People exposure to lower concentration (below 10%) will get pain and other symptoms in 6 hours or more. This may be overlooked by the parties, leading to extremely delayed treatment and finally permanent injury. Generally, the most common part of the injury is the finger. In addition, if exposed from other approaches such as the respiratory tract and gastrointestinal tract, it will produce cough, burning and breathing difficulties and other symptoms, or causing abdominal pain, nausea, vomiting blood, intestinal perforation and other symptoms. The harm of hydrofluoric acid on the human body, in addition to acid corrosion damage, fluoride ions entering into the body may bind to calcium and magnesium ions, resulting in hypocalcemia, hypomagnesemia and hyperkalemia, further affecting the nervous and cardiovascular system. Daily administration of hydrofluoric acid should avoid contact with the body, including skin, eyes and respiratory tract. In prevention of the contact with the skin, we should wear gloves of fluorinated polyethylene (PVDF) and natural rubber. Do not use cloth and cotton gloves and should do systemic protection in occasion easy to splash. We can wear the coverall protecting cloth and work boots of rubber material with the eye should wear goggles or full-face mask. If accidentally corroded by the hydrofluoric acid, immediately use large amount of water to rinse the affected area for at least 30 minutes until there is not any attached solid or liquid that can be observed in the body. Meanwhile, send the patients immediately to hospital for medical treatment as soon as possible. During the medical treatment, we should be brought the chemicals in contact to enable the timely and correct medical treatment by the medical staffs.
Toxicity	See also hydrofluoric acid. Hydrofluoric acid is highly corrosive, being able to corrode glass and nail with its vapor being extremely poisonous. The maximum allowable concentration is 1 mg/m3 (LD501.276 × 10-3). Skin contact will cause swelling and burning sensation and the eyes will get blurred vision. After inhalation, people can get sore throat, cough and have difficulty in breathing. After entering into the digestive tract, people can get abdominal pain, diarrhea, and vomiting. For protection, people should pay attention to ventilation. The operator must wear protective equipment, preventing its contact with the skin. Upon inadvertently contacting the skin, immediately rinse with plenty of water; after rinse away the acid, you can generally use mercurochrome solution or gentian violet for coating the affected area. Upon serious case, the patients should be sent to hospital for treatment. It has irritating and toxic effect with strong corrosive effect on the skin and eyes, being able to produce serious burns; burns do not immediately appear, and the treatment is relatively slow. Access to it must be conducted in a well-ventilated place or in a fume hood. The staff should wear fluoride resistant gloves of suitable size, boots and protective aprons and face shields. In case of contact or suspected contact with this product, rinse with plenty of water and seek for medical treatment immediately.
Production method	Sulfuric acid method: mix the dried fluorite powder and sulfuric acid in the ratio of 1: (1.2~1.3), send into the rotary reaction furnace for reaction. The temperature of the furnace gas phase is controlled at 280 °C ± 10 °C. The post-reaction gas enters into the crude distillation tower for removal of most of the sulfuric acid, water and fluorite powder. The temperature of the tower kettle is controlled at 100 to 110 °C and the top temperature is 35 to 40 °C. The crude hydrogen fluoride gas is further condensed into a liquid state through a degassing tower with the temperature of the tower kettle being controlled at 20 to 23 °C and the top temperature of the tower being controlled at-8 °C ± 1 °C and then enters into the rectification tower for rectification with the temperature of the tower kettle being controlled at 30 to 40 °C and the temperature of the top of the column being controlled at 19.6 ° C ± 0.5 °C. The purified hydrogen fluoride is absorbed by water so the hydrofluoric acid product is obtained. The reaction formula is: CaF2 + H2SO4 → 2HF + CaSO4 Sulfuric acid method: the hydrogen fluoride generated through sulfuric acid decomposition of fluorite is subject to the crude distillation, degassing and then be distilled to produce anhydrous hydrofluoric acid. And the reaction formula is: CaF2 + H2SO4 → 2HF + CaSO4 Refining purification technology: the industrial grade hydrofluoric acid is purified by distillation with condensation to remove impurities, and filtered through a microporous membrane to remove dust particles, producing colorless and transparent electronic grade hydrofluoric acid.
Description	Hydrofluoric acid is a solution of hydrogen fluoride in water. Hydrofluoric acid is highly corrosive inorganic acid. It is utilized widely in the manufacture of ceramics and graphite, in the electropolishing and pickling of metals, in the etching and frosting of glass, in the semiconductor industry as etchant and cleaning agent, in the chemical and oil-refining industries, and in cleaning solutions, laundry powder and pesticides. Hydrofluoric acid is also widely used in the preparation of many useful fluorine compounds, such as Teflon, Freon, fluorocarbons, and many medications such as fluoxetine (Prozac).
Chemical Properties	colourless gas with a pungent odour
Physical properties	Hydrofluoric Acid (HF) is a solution of hydrogen fluoride in water. While this acid is extremely corrosive and difficult to handle, it is technically a weak acid. Hydrogen fluoride, often in the aqueous form as hydrofluoric acid, is a valued source of fluorine, being the precursor to numerous pharmaceuticals such as fluoxetine (Prozac), diverse polymers such as polytetrafluoroethylene (Teflon), and most other synthetic materials that contain fluorine. Hydrofluoric acid is best known to the public for its ability to dissolve glass by reacting with SiO2 (silicon dioxide), the major component of most glass, to form silicon tetrafluoride gas and hexafluorosilicic acid. This property has been known since the seventeenth century, even before hydrofluoric acid had been prepared in large quantities by Scheele in 1771. Because of its high reactivity toward glass, hydrofluoric acid must be stored (in small quantities) in polyethylene or Teflon containers. It is also unique in its ability to dissolve many metal and semimetal oxides. Hydrofluoric acid attacks glass by reaction with silicon dioxide to form gaseous or water-soluble silicon fluorides. Hydrofluoric acid is very dangerous to handle, because the human skin becomes easily saturated with the acid. Even though skin absorption of small areas of only 25 square inches (160 cm2) may be relatively painless, yet the exposure may be ultimately fatal. High concentrations of hydrofluoric acid and hydrogen fluoride gas will also quickly destroy the corneas of the eyes.

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Certificates

Basic Info

Product Name:

Hydrofluoric acid

Other Name:

Hydrofluoric acid;Anhydrous hydrofluoric acid;Fluorhydric acid;Hydrofluoric acid gas;Hydrogen fluoride (HF);Hydrogen fluoride;Antisal 2b;Fluorine monohydride;Hydrogen monofluoride;Fluorine hydride (FH);Fluoric acid;Alsurf 45;G-C Hydrofluoride Gel;Urine Luck 6.3;Vita ceramic etch;Ultradent Porcelain Etch;Porcelain Conditioner;SA-X;32057-09-3;326604-75-5

CAS No.:

7664-39-3

UN No.:

1790

Molecular Formula:

InChIKeys:

InChIKey=KRHYYFGTRYWZRS-UHFFFAOYSA-N

Molecular Weight:

20.00630

Exact Mass:

20.00620

EC Number:

231-634-8

HScode:

2811110000

Categories:

Bulk Drug Intermediates

Characteristics

PSA:

XLogP3:

0.53270

Appearance:

colourless gas with a pungent odour

Density:

0.991 g/cm³ @ Temp: 19.54 °C

Melting Point:

-83.36 °C

Boiling Point:

20 °C

Flash Point:

-37.8ºC

Water Solubility:

H2O: soluble

Storage Conditions:

Protect against physical damage. Store at in well-ventilated area, separated from other storage.

Vapor Pressure:

25 mm Hg ( 20 °C)

Vapor Density:

1.27 (vs air)

Toxicity:

LC50 (15 min.) in rats, guinea pigs: 2689, 4327 ppm (Rosenholtz)

Flammability characteristics:

Nonflammable Gas

See More Hydrofluoric acid Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 2, Oral

Acute toxicity - Category 1, Dermal

Skin corrosion, Sub-category 1A

Acute toxicity - Category 2, Inhalation

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H300 Fatal if swallowed H310 Fatal in contact with skin H314 Causes severe skin burns and eye damage H330 Fatal if inhaled
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P262 Do not get in eyes, on skin, or on clothing. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P260 Do not breathe dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P284 [In case of inadequate ventilation] wear respiratory protection.
Response	P301+P316 IF SWALLOWED: Get emergency medical help immediately. P321 Specific treatment (see ... on this label). P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P316 Get emergency medical help immediately. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P363 Wash contaminated clothing before reuse. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P320 Specific treatment is urgent (see ... on this label).
Storage	P405 Store locked up. P403+P233 Store in a well-ventilated place. Keep container tightly closed.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO contact with incompatible substances. See Chemical Dangers. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Cool. Fireproof if in building. Keep in a well-ventilated room. Separated from food and feedstuffs and incompatible materials. Store in an area without drain or sewer access. See Chemical Dangers.Hydrogen fluoride must be stored to avoid contact with metals, concrete, glass, and ceramics, because it can severely corrode these materials. Contact with metals may form a flammable gas. Keep away from heat. Where possible automatically pump liquid from drums or other storage containers to process containers.

See More Hydrofluoric acid Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,peptides,electronic chemicals

Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone

Payment Terms:
100% TT in advance

Average lead Time:
10

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

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We are mainly specilized in supply of pharmaceutical intermediates, electronic chemicals，food additives, and other fine chemical products.
Integrity is the foundation, quality is life. We would like to work together with you to build a greener and brighter future.

Website: orientchem.cc
Email: scarlett@orientchem.cc
WhatsApp: +86 17753254221

Inquiry History

37 Inquiries

Country	Product	Purchase Quantity	Date Posted
Turkey	Hydrogen Fluoride	100 MT	Sep 1, 2023
India	Hydrofluoric acid 48%	2.00 20' Fcl	Aug 1, 2025
Brazil	Fluoride acid 70%	1.00 20' Fcl	Jul 19, 2025
Vietnam	Hydrofluoric acid	1 20' Fcl	Mar 17, 2025
India	hydrofluoric acid	1 KG	Jan 9, 2024
Russia	Hydrofluoric acid	1000 KG	Dec 11, 2023
Vietnam	High quality Hydrofluoric acid Industrial Grade	50 MT	Oct 23, 2023
Kazakstan	Hydrogen fluoride	200 MT	Oct 10, 2023
France	High quality Hydrofluoric acid Industrial Grade	1 MT	Sep 7, 2023
Turkey	Hydrofluoric acid	5 MT	Aug 28, 2023
United Arab Emirates	HYDROFLUORIC ACID	150 TON	Aug 21, 2023
Czech	Hydrofluoric acid	20 MT	May 31, 2026
Nigeria	hydrofluoric acid	5000 MT	Sep 30, 2025
India	Diluted Hydrofluoric Acid (60%)	38.00 KG	Aug 8, 2025
Vietnam	Hydrofluoric acid	1 20' Fcl	Mar 12, 2025
India	Hydroflouric acid	100 MT	Sep 18, 2024
Malaysia	anhydrous hydrofluoric acid	72 MT	Jul 19, 2024
Vietnam	HF	2900.00 KG	Jan 29, 2024
Vietnam	Hydrogen fluoride	1.00 20' Fcl	Dec 7, 2023
Saudi Arabia	hydrogen fluoride	40.00 MT	Nov 30, 2023

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Hydrogen fluoride CAS:7664-39-3

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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