Fluoboric acid
Fluoroboric acid
CAS: 16872-11-0
Molecular Formula: BF3.FH
Fluoboric acid - Names and Identifiers
| Name | Fluoroboric acid |
| Synonyms | Fluoboric Acid Fluoroboric acid fluoboricacid[qr] tetrafluoroborate fluoroboronic acid Tetrafluoroborsure Hydrofluoboric acid Tetrafluoroboric acid Hydrogen tetrafluoroborate trifluoroborane hydrofluoride Fluoboric acid~Tetrafluoroboric acid borofluorodorodic acid (from fluorine) |
| CAS | 16872-11-0 |
| EINECS | 240-898-3 |
| InChI | InChI=1/BF3.FH/c2-1(3)4;/h;1H |
Fluoboric acid - Physico-chemical Properties
| Molecular Formula | BF3.FH |
| Molar Mass | 87.81 |
| Density | 1.38g/mLat 20°C(lit.) |
| Melting Point | -90°C |
| Boling Point | 130°C (dec.) |
| Flash Point | −40°F |
| Water Solubility | MISCIBLE |
| Vapor Presure | 5 mmHg ( 20 °C) |
| Vapor Density | 3 (vs air) |
| Appearance | Liquid |
| Color | Light Yellow |
| Odor | Odorless |
| Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3 |
| Merck | 14,4149 |
| pKa | -4.9[at 20 ℃] |
| Stability | Stable. Incompatible with strong bases, cyanides. |
| Refractive Index | nD20 of a 20% aq sol |
| Physical and Chemical Properties | Colorless transparent liquid. Miscible with water or alcohol. |
| Use | For metal surface oxide, silicate film cleaning and etchant |
Fluoboric acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S37 - Wear suitable gloves. S27 - Take off immediately all contaminated clothing. |
| UN IDs | UN 1775 8/PG 2 |
| WGK Germany | 1 |
| RTECS | ED2685000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 28111990 |
| Hazard Note | Corrosive |
| Hazard Class | 8 |
| Packing Group | II |
Fluoboric acid - Upstream Downstream Industry
Fluoboric acid - Nature
Open Data Verified Data
colorless transparent liquid. The relative density of about 1. 37; 20% aqueous solution of 1. 3284. Strong acid. Can not exist in pure state, can only exist in aqueous solution. Fluoboric acid is stable in concentrated solution and decomposes when heated to 130 °c. Miscible with water or alcohol. It is slowly decomposed in an aqueous solution, and the stability is gradually decreased upon contact with a glass surface. It is highly corrosive and can corrode most metals and organic tissues, but it does not attack glass at room temperature. It can react with metal elements, metal fluorides, oxides, hydroxides or carbonates to form the corresponding fluoroborates. Toxic fluoride gas is released by thermal decomposition.
Last Update：2024-01-02 23:10:35
Fluoboric acid - Preparation Method
Open Data Verified Data
hydrofluoric acid method according to the theoretical amount of hydrofluoric acid and boric acid, boric acid is slowly added to hydrofluoric acid under stirring, the reaction temperature is controlled below 40 ℃, and the mechanical stirring is stopped after heating, placed at room temperature for more than 2H, and then filtered purification, prepared fluoroboric acid products.
Last Update：2022-01-01 08:59:49
Fluoboric acid - Use
Open Data Verified Data
used as the main composition of the fluoroboric acid system electroplating solution. It is used for electrolytic polishing of pure aluminum, the most suitable lead electrolyte for lead storage battery, enhancing the permeability of crude oil in oil field exploitation, preparing diazonium salt stabilizer and various fluoroborate raw materials, alkylation and polymerization catalysts. It can also be used for cleaning and corrosion of metal surface oxide and silicate films.
Last Update：2022-01-01 08:59:49
Fluoboric acid - Safety
Open Data Verified Data
packed in polyethylene plastic barrel. 4kg, 15 0kg or 250kg net per barrel. Should be stored in a cool, ventilated warehouse. The lid should be sealed, and should be protected from rain and sunlight during transportation. Handling should be careful to prevent collision, so as to avoid damage to the container. It is a Class II inorganic acid corrosion article. Risk code: GB Class 8.1 81026. UN NO. 1175 ; IMDG code 8.1 p. 1. It has strong corrosive effect on skin and mucous membrane, and has stimulating effect on eyes and respiratory system. Even if diluted very thin, can hinder the fermentation. The maximum allowable concentration is 2.5 mg/m3. In case of inadvertent application to eyes or body, Rinse eyes with water and thoroughly wash the contaminated area with soap and water. Severe cases were sent to the hospital. Operators must wear masks, rubber gloves and work clothes.
Last Update：2022-01-01 08:59:50
Fluoboric acid - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | fluoroboric acid is also known as "hydrobororofluoric acid", "tetrafluoroborohydrogen acid". Chemical formula hbf4. Molecular weight 87.81. Colorless transparent liquid. Toxic! It is highly corrosive and cannot be stored in glass containers for a long time. Boiling point of 130 deg C, while slow decomposition. Soluble in water and ethanol, and water co-thermal decomposition of fluorine oxygen boric acid and boron trioxide (can be concentrated to 30%), the solution is strongly acidic, at room temperature does not corrode glass. Fluoroboric acid is a strong acid, which is only present in solution. The common fluoroborate is potassium tetrafluoroborate. production method: it can be obtained by reacting concentrated hydrofluoric acid with boric acid. purposes: for smelting light metals and electroplating, even very dilute solution can be used as a fermentation inhibitor, but also for the preparation of diazonium salts, acetal catalyst, in the presence of magnesium ions and potassium ions for the determination of sodium reagent. Aniline as raw material in concentrated hydrochloric acid with sodium nitrite reaction, the formation of diazonium salt, and then at low temperature (-10 deg C), the diazonium salt and fluoroboric acid reaction, finally pyrolysis, can be prepared by fluorobenzene. |
| toxicity | has strong corrosive effect on skin and mucous membrane, and has stimulating effect on eyes and respiratory system. Even if diluted very thin, can hinder the fermentation. The maximum allowable concentration is 2.5 mg/m3. In case of inadvertent application to eyes or body, Rinse eyes with water and thoroughly wash the contaminated area with soap and water. Severe cases were sent to the hospital. Operators must wear masks, rubber gloves and work clothes. |
| Application | used as catalyst for acetaldehyde synthesis, metal surface cleaner, lead electrolytic polishing agent, as a stabilizer for diazonium salts, but also for electrolytic industry, etc. for metal surface oxides, silicate film cleaning and etchant, etc. used for metal surface oxide, silicate film cleaning and etchant, aluminum and alloy cleaning before plating. The 2.5% solution was used as a rewash for electrolytic polishing of pure aluminum and removal of flux from metal substrates and plating parts. It is used as a catalyst for alkylation and polymerization, as a preservative, as a chemical reagent, and as a raw material for the preparation of various fluoroborates. for cleaning of metal surfaces and prior to gold electroplating. The preparation of stable diazonium salts, the production of acetal catalysis, in the presence of magnesium ions and potassium ions in the determination of sodium reagent organic synthesis catalyst, also used in sponge titanium and its alloys-dissolved and printed circuit board industry. |
| production method | The hydrofluoric acid method is based on the theoretical quantities of hydrofluoric acid and boric acid, slowly add boric acid to hydrofluoric acid under stirring, control the reaction temperature below 40 ℃, stop mechanical stirring after heating, place it at room temperature for more than 2H, and purify it by filtration, the fluoroboric acid product was prepared. Its 4HF H3BO3 → hbf3 Oh HF 2H2O hbf3 Oh HF → HBF4 H2O |
| category | corrosive article |
| toxicity grade | poisoning |
| flammability hazard characteristics | in case of H, the pore forming agent is flammable; Heat decomposes toxic fluoride gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from cyanide, H pore forming agent and alkali. |
| extinguishing agent | Sand, carbon dioxide |
| Occupational Standard | TWA 2.5 mg (fluorine)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for Fluoboric acid
Downstream Products for Fluoboric acid
Tin(II) fluoroborate
2,3,4-Trifluoronitrobenzene
1,2,4,5-tetrafluorobenzene
3-Fluoroaniline
2,6-Dichlorofluorobenzene
3-Fluorophenol
flunarizine dihydrochloride
2,3,4-Trifluoronitrobenzene
1,2,4,5-tetrafluorobenzene
3-Fluoroaniline
2,6-Dichlorofluorobenzene
3-Fluorophenol
flunarizine dihydrochloride