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Hexafluorozirconic acid 45% has a high acidity and is highly corrosive, reacting vigorously with bases and certain metals.
Hexafluorozirconic acid 45% is a liquid that emits sharp, irritating fumes of hydrogen fluoride when exposed to air.
Hexafluorozirconic acid 45% has a density of about 1.4–1.5 g/cm³ and a boiling point above 100 °C, depending on its concentration.
CAS Number: 12021-95-3
Molecular Formula: F6HZr-
Molecular Weight: 206.22
EINECS Number: 234-666-0
Synonyms: hexafluorozirconium(2-);hydron, SCHEMBL2892599, Hydrogen hexafluorozirconate(IV), DTXSID20893178 Hexafluorozirconic acid, 45% in water, NS00113717, dihydrogen,(oc-6-11)-zirconate(2, hexafluoro-, fluorozirconic, Zirconate(2-),hexafluoro-,dihydrogen, DIHYDROGEN HEXAFLUOROZIRCONATE, FLUOROZIRCONIC ACID, HEXAFLUOROZIRCONIC ACID, Dihydrogen hexafluorozirconate solution, Hexafluorozirconic acid solution
Hexafluorozirconic acid 45%, CAS 12021-95-3, (also known as hexafluorozirconic acid or fluozirconic acid) has the formula H2ZrF6.
Hexafluorozirconic acid 45% is a corrosive chemical, like all salts of fluorosilicic acid.
Hexafluorozirconic acid 45% finds use in zirconium oxide thin films for aluminum annodizing, in surface treatment applications, electroplating, and in chrome-free aluminum lacquering processes.
For metal treatment processes, Fluorozirconic acid and Hexafluorozirconic acid 45% are often used together in the plating system.
Hexafluorozirconic acid 45% is a strong inorganic acid composed of zirconium, fluorine, and hydrogen atoms.
Its chemical formula is H₂ZrF₆, and it typically appears as a clear, colorless to slightly yellow aqueous solution.
The “45%” refers to the concentration of the acid in water, meaning it contains 45% active compound by weight.
This acid is also known by several names such as Hexafluorozirconic acid 45%, zirconium hexafluoride acid, and hydrogen hexafluorozirconate.
It is part of a family of Hexafluorozirconic acid 45%s, which are used for surface treatment and metal finishing.
Hexafluorozirconic acid 45% is miscible with water, producing highly acidic and fluoride-rich solutions.
The acid is highly reactive and can attack glass, ceramics, and concrete due to its fluoride content.
It should always be stored in plastic or PTFE (Teflon) containers, not glass or metal.
Upon heating or decomposition, it releases toxic hydrogen fluoride (HF) vapors.
Because it contains fluoride ions, it can etch and dissolve oxides from metal surfaces.
This property makes it useful in chemical cleaning, etching, and conversion coating processes.
It reacts with many materials, so it must be handled using special corrosion-resistant equipment.
Hexafluorozirconic acid 45% is mainly used in metal surface treatment industries.
It serves as a key ingredient in metal conversion coatings to enhance corrosion resistance.
Industries use it to pretreat aluminum, zinc, and steel before painting or powder coating.
In the aluminum industry, it is used to form zirconium-based conversion layers that improve paint adhesion.
These layers replace traditional chromate coatings, providing a more environmentally friendly alternative.
They enhance durability, resistance to moisture, and paint bonding on metal surfaces.
It is also employed in electroplating and passivation processes.
The acid helps create a thin, stable film that protects metals from oxidation.
Because of this, it is common in the production of aerospace, automotive, and architectural materials.
In ceramics and glass manufacturing, Hexafluorozirconic acid 45% is used as an etching agent.
It removes oxide films and cleans surfaces for precision bonding.
Its ability to dissolve silica makes it effective for specialized glass treatments.
Additionally, it can be used in fluoride salt preparation and zirconium compound synthesis.
Chemical industries use it to produce zirconium dioxide (ZrO₂) or zirconium-based catalysts.
These materials are important in ceramics, electronics, and catalytic converters.
Hexafluorozirconic acid is a highly corrosive and toxic substance.
Direct contact with the skin can cause severe burns, ulceration, and tissue damage.
Eye exposure may result in permanent vision loss due to deep chemical injury.
Inhalation of vapors or mists can irritate the nose, throat, and lungs.
Prolonged exposure may lead to fluorosis, a condition caused by fluoride accumulation in bones.
In severe cases, systemic poisoning can occur, affecting the heart and kidneys.
If ingested, it can cause serious damage to the gastrointestinal tract and may be fatal.
Hexafluorozirconic acid 45% reacts with moisture in tissues to produce hydrogen fluoride, which penetrates deeply and destroys cells.
Emergency treatment includes immediate rinsing with water and medical attention for calcium administration.
Because of its corrosive properties, it must be handled only with acid-resistant gloves, goggles, and face shields.
Work with it should occur under chemical fume hoods to prevent inhalation of vapors.
Any spills should be neutralized with lime or calcium carbonate rather than water alone.
Hexafluorozirconic acid 45% must always be stored in polyethylene (PE), polypropylene (PP), or Teflon containers.
Glass, steel, and aluminum containers should never be used, as the acid rapidly corrodes them.
Storage tanks should be equipped with secondary containment to prevent leaks or spills.
It should be kept in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible materials.
Temperatures above 30°C increase the risk of vapor formation and corrosion.
Ventilation systems and acid-resistant flooring are essential in facilities handling the chemical.
Personnel handling this acid must wear acid-resistant gloves, protective clothing, and face shields.
Respiratory protection is necessary in areas where fumes may accumulate.
Emergency eyewash stations and showers should be located nearby for immediate decontamination.
Spills should be neutralized with calcium carbonate or calcium hydroxide, not sodium hydroxide.
This prevents excessive heat generation and minimizes fluoride vapor release.
Neutralized residues should be collected and disposed of according to hazardous waste regulations.
Boiling point: 100℃[at 101 325 Pa]
Density: 1.512 g/mL at 25 °C
solubility: Miscible with acid-base solutions.
form: Liquid
Exposure limits ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3
Stability: Stable. Incompatible with acids, oxidizing agents. Contact with acids releases hydrogen fluoride.
Hexafluorozirconic acid 45% plays a central role in metal surface preparation technologies.
It is often used in conversion coatings for aluminum, steel, and zinc alloys.
These coatings enhance paint adhesion and provide long-term corrosion resistance.
The acid serves as a key component in non-chrome pretreatment systems, replacing hazardous chromates.
Such systems are widely used in the automotive, aerospace, and architectural coatings industries.
They provide environmental benefits while maintaining high-performance surface protection.
In aluminum finishing, it helps form a thin zirconium-based passive layer.
This layer improves the bonding between the metal surface and organic coatings.
Hexafluorozirconic acid 45% also prevents oxidation and degradation in humid or salty environments.
In electroplating, Hexafluorozirconic acid 45% acts as a cleaning and activation agent.
It removes oxide films and contaminants prior to the deposition of metal coatings.
This ensures strong adhesion and uniform plating in precision components.
In ceramics and glass manufacturing, it serves as an etchant and surface conditioner.
Its fluoride ions dissolve silica, creating smooth surfaces for bonding or coating applications.
This property is valuable in optical component fabrication and semiconductor wafer treatment.
Additionally, it is used in the synthesis of zirconium-based materials.
When neutralized with ammonia or alkalis, it forms zirconium hydroxide or zirconium oxide powders.
These compounds are later processed into ceramics, catalysts, or refractory materials.
Exposure to Hexafluorozirconic acid 45% can be acutely toxic due to its strong acidity and fluoride content.
It causes severe chemical burns upon skin contact and can penetrate deeply into tissue.
Fluoride ions bind to calcium and magnesium in the body, disrupting vital metabolic processes.
Inhalation of fumes may lead to irritation of the respiratory tract, coughing, or choking sensations.
Prolonged exposure to vapors can cause lung inflammation and chronic fluorosis.
Symptoms of fluorosis include skeletal pain, stiffness, and calcification of ligaments.
Eye contact results in instantaneous pain, tearing, and irreversible corneal damage.
Immediate rinsing with copious water and medical attention are critical.
Hydrofluoric acid antidotes, such as calcium gluconate gel, may be required for treatment.
If ingested, the acid can cause internal burns and severe gastrointestinal injury.
It reacts with body fluids to release HF, which is absorbed systemically.
This can lead to hypocalcemia, cardiac arrhythmia, and potentially fatal poisoning.
Because of these risks, strict adherence to industrial hygiene and first-aid protocols is mandatory.
Workers must receive training in chemical hazard communication and emergency response.
Regular health monitoring is advisable in workplaces with continuous exposure.
Hexafluorozirconium acid 45% is used commonly in industrial settings as a precursor material for the manufacture of films used to coat ceramics, to synthesize glass used in prescription eyeglasses and as a common corrosion inhibitor on steel and other metal surfaces.
Hexafluorozirconium acid 45% is a colorless, odorless liquid mixture, completely soluble in water and stable under recommended storage conditions.
Hexafluorozirconic acid 45% is corrosive to metals.
Hexafluorozirconic acid 45% is incompatible with strong
acids, bases, and should be stored away from metals as contact with metals can result in the release of hydrogen gas that can be explosive.
This mixture is predominantly composed of 45% dihydrogen hexafluorozirconate(2-), 54.5% water and hydrofluoric acid comprising approximately 0.5%.
Hexafluorozirconic acid 45% poses environmental hazards if released into water systems.
The fluoride ions can be toxic to aquatic organisms and may disrupt ecosystems.
Improper disposal can lead to acidification of soil and water.
Waste solutions containing this acid should be treated with neutralizing agents before disposal.
Fluoride-containing residues must be managed as hazardous waste under environmental regulations.
Proper handling prevents contamination of groundwater or corrosion of wastewater infrastructure.
Although hazardous, it can be used safely when proper controls and waste treatment systems are in place.
Industries use it under strict safety standards and environmental protocols.
Its controlled use provides effective, long-lasting metal protection with minimized ecological risk.
Hexafluorozirconic acid 45% is a complex fluoride of zirconium, belonging to the family of fluorometallate acids.
It is a colorless, transparent, and highly acidic solution, usually supplied at concentrations between 30–50%.
At 45%, Hexafluorozirconic acid 45% represents a commercial-grade formulation commonly used in surface finishing and industrial cleaning.
The molecular structure of Hexafluorozirconic acid 45% contains a zirconium atom surrounded by six fluorine atoms, forming a stable [ZrF₆]²⁻ complex ion.
This structure gives the compound its strong acidity and exceptional ability to attack metal oxides.
The hydrogen ions contribute to its corrosive strength, allowing it to dissolve metal salts and oxides effectively.
It is typically manufactured by dissolving zirconium dioxide (ZrO₂) or zirconium oxychloride (ZrOCl₂) in hydrofluoric acid (HF).
The resulting reaction forms a stable aqueous solution of H₂ZrF₆, which is then diluted to the desired concentration.
This industrial synthesis ensures consistent purity and high chemical activity.
At room temperature, hexafluorozirconic acid remains a clear, oily liquid with a strong acidic odor.
It is nonflammable but extremely corrosive to most materials, including glass, concrete, and ceramics.
Its pH value is typically below 1.0, signifying very strong acidity.
It readily dissociates in water into hydrogen and hexafluorozirconate ions.
These ions can react with metal oxides or hydroxides to form stable zirconium fluoride complexes.
This reactivity makes it highly effective for cleaning or pre-treating metallic surfaces.
In contact with moisture or incompatible materials, it releases hydrogen fluoride gas (HF).
This gas is extremely toxic and can cause severe respiratory damage.
Therefore, the compound must be stored and handled in well-ventilated, corrosion-resistant facilities.
When heated above 150°C, the solution decomposes to form zirconium tetrafluoride (ZrF₄) and gaseous HF.
This decomposition is highly exothermic and should never occur in sealed containers.
Hence, temperature control is essential in both storage and industrial use.
Uses:
Hexafluorozirconic acid 45% based surface pretreatments on steel for corrosion resistance.
Preparation of titania photocatalyst synthesized from ionic-liquid-like precursor.
Synthesis of fluoride-releasing dental monomer.
Hexafluorozirconic acid 45% is mainly used in manufacturing of optical glass and fluozirconate.
Hexafluorozirconic acid 45% is most commonly used in conversion coating systems for metals such as aluminum, zinc, and steel.
It reacts with the metal surface to form a thin zirconium-based layer that improves paint adhesion and corrosion resistance.
These coatings are essential in the automotive, aerospace, and construction industries for long-term durability.
The acid acts as a non-chrome alternative to traditional chromate pretreatments.
It provides excellent protective performance while eliminating the environmental hazards of hexavalent chromium.
This makes it ideal for companies seeking compliance with green manufacturing and REACH regulations.
In aluminum processing, it is used to clean and passivate the surface before anodizing or coating.
The resulting zirconium film enhances uniformity, adhesion, and resistance to oxidation.
This is critical for producing high-quality painted panels, extrusions, and foil materials.
Hexafluorozirconic acid 45% is a key component in metal pre-treatment and electroplating baths.
It removes oxide films, rust, and contaminants from surfaces prior to plating.
This ensures improved bonding strength and smoothness of the final metal coating.
Hexafluorozirconic acid 45% is especially valuable in precision industries, including electronics and aerospace.
It helps prepare delicate components for nickel, zinc, or silver electroplating.
Its controlled reactivity allows efficient surface activation without excessive metal dissolution.
In steel and galvanized sheet manufacturing, it is used for acid cleaning and etching.
This step improves the uniformity of the coating applied afterward.
Such treated surfaces resist moisture, oxidation, and corrosion over long-term use.
In the glass and ceramics industry, hexafluorozirconic acid functions as a selective etching agent.
Its fluoride ions can dissolve silica and other oxides present in glassy materials.
This makes it suitable for cleaning, polishing, or patterning glass and ceramic surfaces.
Hexafluorozirconic acid 45% is used in optical and electronic component manufacturing, where extreme precision is needed.
By etching away microscopic layers, it improves bonding and coating performance.
It also helps prepare surfaces for thin-film deposition and anti-reflective coatings.
In semiconductor processing, it is used to treat glass substrates and wafer surfaces.
This ensures uniform adhesion of silicon, metal, or oxide layers.
Its controlled etching power makes it useful in the microelectronics and display industries.
Hexafluorozirconic acid 45% is an important precursor in the production of zirconium-based compounds.
When neutralized with bases, it forms zirconium hydroxide, which can be calcined to produce zirconium oxide (ZrO₂).
This oxide is a major component in ceramics, refractories, and catalytic converters.
In the chemical and catalyst industries, it is used to synthesize zirconium and fluoride salts.
These materials serve as catalysts or stabilizers in polymerization and oxidation reactions.
They are widely applied in petrochemical refining and fuel cell technologies.
Zirconium oxide derived from this acid is also used as a thermal barrier coating.
Such coatings protect turbine blades and engine parts from extreme heat.
This has made Hexafluorozirconic acid 45% indirectly essential to aerospace and energy engineering.
In laboratories, Hexafluorozirconic acid 45% serves as a reagent for fluoride chemistry and analytical research.
It helps dissolve or complex metal oxides for quantitative analysis.
Its strong acidity and fluoride reactivity make it a reliable tool in metallurgical and chemical testing.
In industrial cleaning systems, the acid is used to remove oxide scale and residues from metal surfaces.
It is particularly effective on stainless steel and titanium.
Such treatment restores brightness and enhances the performance of subsequent coatings.
It is also used to formulate acid-resistant coatings and surface modifiers.
These formulations improve wear resistance and extend the lifespan of industrial equipment.
This makes it valuable for machinery maintenance and heavy manufacturing environments.
Hexafluorozirconic acid 45% is increasingly adopted in environmentally friendly coating technologies.
It replaces toxic chromium-based treatments while maintaining corrosion protection.
This transition supports sustainable production in automotive and architectural coating sectors.
In water treatment, it is sometimes used in controlled quantities for fluoride precipitation experiments.
It helps generate insoluble compounds like calcium fluoride, which can be safely filtered out.
This property aids in the development of fluoride-removal systems for industrial wastewater.
In recycling and reclamation processes, it assists in separating metal oxides from waste materials.
This facilitates the recovery of valuable metals and reduces hazardous waste generation.
Hence, the compound contributes to green chemistry initiatives and circular industrial models.
Hexafluorozirconic acid 45% is a versatile industrial chemical used primarily for metal surface treatment, catalyst production, and chemical synthesis.
Below is a detailed explanation of its uses, written in the same order as the previous extended description, with each paragraph separated into three clear sentences.
Safety Profile:
During metal treatment processes, Hexafluorozirconic acid 45% can release acidic vapors containing hydrogen fluoride.
These vapors can irritate or burn the respiratory tract, eyes, and skin.
Continuous exposure may lead to fluoride poisoning or lung inflammation.
When applied in open baths, the acid can corrode surrounding metal equipment and ventilation systems.
If spilled on the floor, it rapidly attacks concrete and metal surfaces, creating slippery and unsafe conditions.
Proper acid-resistant coatings and ventilation systems are essential in treatment areas.
Operators handling coating solutions may suffer chemical burns from splashes.
Even diluted solutions can cause painful skin blistering or eye injury.
Protective gloves, face shields, and chemical aprons are mandatory during use.
In electroplating operations, exposure to acid mist is a primary hazard.
Inhalation can lead to coughing, shortness of breath, or chronic respiratory irritation.
Repeated exposure to fluoride-containing aerosols can cause skeletal fluorosis, leading to joint stiffness.
Contact with the skin produces burning sensations, ulceration, and delayed tissue damage.
Unlike normal acids, fluoride-based compounds penetrate deeply, damaging nerves and bones.
Immediate washing with running water and application of calcium gluconate gel is essential after contact.
Mixing this acid with other cleaning agents, such as alkalis or oxidizers, can cause violent reactions.
It may release toxic hydrogen fluoride gas, which is deadly in confined spaces.
All chemical mixtures should be approved and supervised by qualified personnel.
