Tetrafluoroboric acid

87.81260

88.01070

240-898-3

H429WZ9FBQ

1040

1775

DTXSID8029739

Colorless liquid

2811199090

0

1.41250

Fluoroboric acid appears as a colorless odorless poisonous liquid. Corrosive to metals and tissue. It is used in electroplating, metal cleaning and making diazo salts.

1.84 g/cm³ (approx)

-90ºC

130ºC (dec.)

-40 °F

Refractive index of a 20% aqueous solution: 1.3284 at 20 °C/D

Very soluble in water, ethanol

Pure HBF4 (fluoroboric acid) may be stored in glass vessels at room temperature.

39100mmHg at 25°C

pKa: -4.9

Heat of formation: 388.5 kcal; undergoes limited hydrolysis in water to form hydroxyfluoborate ions; major product is BF3OH- ion; forms crystalline salts with metals|Heat of formation (aqueous, 1 molal at 25 °C): -1527 kJ/mol; specific gravity (48% solution): 1.37; specific gravity (42% solution): 1.32; specific gravity (30% solution): 1.20; surface tension (48% solution at 25 °C): 65.3 mN/m|Fluoroboric acid does not exist as a free, pure substance; the acid is only stable as the solvated ion pair, such as H3O+BF4-

Soluble in water with release of heat.

Acids, Strong Non-oxidizing

Known Catalytic Activity

FLUOROBORIC ACID is a strong acid. Reacts exothermically with chemical bases (examples: amines, amides, and inorganic hydroxides). These reactions can generate dangerously large amounts of heat in small spaces. Dissolution in water or the dilution of a concentrated aqueous solution may generate significant heat. Reacts with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. Can initiate the polymerization of certain alkenes. Reacts with cyanide compounds to release gaseous hydrogen cyanide. Generates flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. Additional gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. May catalyze (increase the rate of) chemical reactions. Attempted drying of the acid with acetic anhydride caused an explosion at 0°C [J. Organomet. Chem., 1975, 94, 319].

II

8

UN 1775

1

R34

S26-S37-S45

ED2685000

C

Stable. Incompatible with strong bases, cyanides.

P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501

H314

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.|Waste treatment ... includes a pretreatment with aluminum sulfate to facilitate hydrolysis, and final precipitation of fluoride with lime.|Two methods for the treatment of fluoborate wastewater from the electroplating of tin, solder, copper and nickel striping were investigated. These involved specific ion flotation and electrodialysis. The fluoborate ion was found to bind with an alkylamine acetate by displacement of the acetate group and can be removed from dilute waste stream either by air flotation or ultrafiltration. A high density low porosity graphite anode that is resistant to the corrosive properties of fluoboric acid electrolyte was developed for electrodialysis treatment of the tin, solder and copper fluoborate containing wastewaters. In general, recoveries of the fluoborate ions were in excess of 80 percent.

Interaction of ... /hexafluorisopropylideneaminolithium/ with a range of chloro- and fluoro-derivatives of boron ... during warming to 25 °C tended to be violently exothermic in absence of solvent.|Undergoes limited hydrolysis in water to form hydroxyfluoborate ions; major product is BF3OH-.|The substance decomposes on heating and on burning producing toxic and corrosive fumes including hydrogen fluoride and fluorine. The substance is a strong acid, it reacts violently with bases and is corrosive. Attacks many metals forming flammable/explosive gas /From table/|Noncombustible, but material reacts with active metals, releasing flammable hydrogen gas.

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. For electric vehicles or equipment, ERG Guide 147 (lithium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. (ERG, 2016)|Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.|Corrosives, Reactive - 1st degree

|Danger|H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, and P501|H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|Aggregated GHS information provided by 170 companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H290: May be corrosive to metals [Warning Corrosive to Metals]|P234, P260, P261, P264, P270, P271, P280, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P309+P311, P310, P312, P314, P321, P322, P330, P361, P363, P390, P403+P233, P404, P405, and P501|P234, P260, P264, P270, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P309+P311, P310, P314, P321, P330, P363, P390, P404, P405, and P501

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2016)

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible. (ERG, 2016)|Protective gloves. Protective clothing. Face shield or eye protection in combination with breathing protection.

Use appropriate extinguishing agent for surrounding fire. Use water spray to keep fire-exposed containers cool.|If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire (Material itself does not burn or burns with difficulty). Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Aqueous HBF4 and/or its salt is treated by aluminum sulfate or ferric chloride and aqueous ammonia, ammonium sulfate, ammonium chloride and urea, then with calcium hydroxide, and precipitate is filtered.|Spill or leak procedures: Stop or control the leak, if this can be done without undue risk. Approach release from upwind. Control runoff and isolate discharged material for proper disposal.|Environmental considerations: land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Absorb bulk liquid with fly ash or cement powder. Neutralize with agriculture lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3).|Environmental considerations: water spill: Neutralize with agriculture lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3).|For more Cleanup Methods (Complete) data for FLUOBORIC ACID (6 total), please visit the HSDB record page.

SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.|SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.|SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.|If material not involved in fire: Keep material out of water sources. Build dikes to contain flow as necessary. Neutralize spilled material with crushed limestone, soda ash, or lime.|Personnel protection: Avoid breathing vapors. Keep upwind. Avoid bodily contact with material. Do not handle broken packages unless wearing appropriate personal protective equipment. Wash away any material which may have contacted the body with copious amounts of water or soap and water. If contact with material anticipated, wear appropriate chemical protective clothing.

/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Health: TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.|/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.|/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas.|/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.|For more DOT Emergency Guidelines (Complete) data for FLUOBORIC ACID (8 total), please visit the HSDB record page.

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that person is registered in conformance ... and the hazardous material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./|The International Air Transport Association (IATA) Dangerous Goods Regulations are published by the IATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual of industry carrier regulations to be followed by all IATA Member airlines when transporting hazardous materials.|The International Maritime Dangerous Goods Code lays down basic principles for transporting hazardous chemicals. Detailed recommendations for individual substances and a number of recommendations for good practice are included in the classes dealing with such substances. A general index of technical names has also been compiled. This index should always be consulted when attempting to locate the appropriate procedures to be used when shipping any substance or article.

Irritating to eyes and respiratory tract.|... May produce irritation of the nasal mucous membranes, the respiratory tract, and eyes. /Boron compounds/

Permissible Exposure Limit: Table Z-1 8-hr Time Weighted Avg: 2.5 mg/cu m. /Fluorides, as F/

Personal protection: complete protective clothing including self-contained breathing apparatus. Consult an expert! Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

Separated from strong bases, metals and food and feedstuffs. Well closed. Ventilation along the floor. Store only in original container. Do NOT store or transport in containers made from metal or glass. Store in an area without drain or sewer access.

No indication can be given about the rate at which a harmful concentration of this substance in the air is reached when dispersed.

Corrosive. Inhalation may cause severe swelling of the throat. This may result in asphyxia. Inhalation may cause lung oedema, but only after initial corrosive effects on eyes and/or airways have become manifest. Exposure at high levels could cause severe lung damage. Medical observation is indicated.

AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!

Use ventilation, local exhaust or breathing protection.

Protective gloves. Protective clothing.

Wear face shield or eye protection in combination with breathing protection.

| 3 - Materials that, under emergency conditions, can cause serious or permanent injury.| 0 - Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand.| 0 - Materials that in themselves are normally stable, even under fire conditions.

LD50 Rat oral 100-200 mg/kg bw|LD50 Rat oral 464-1000 mg/kg bw /51% Tetrafluoroboric acid/|LD50 Mouse oral <50 mg/kg bw|LD50 Guinea pig dermal 2.5-5.0 mL/kg bw /21.7% Tetrafluoroboric acid/|LD50 Rat ip 10-25 mg/kg bw

...All of a total of 6.4 mg/day of fluoroboric acid that /a subject/ ingested was recovered in the urine in a 14-day period, and less than 10% of the amount absorbed into the bloodstream was retained when ingestion was extended to 7 to 38 wk in other subjects. Contrary to the F- ion, the complex BF4- ion is not stored in the bone, and because of the slow rate of hydrolysis, excretion outruns hydrolysis, leaving little opportunity for F- ion storage.|In a further study... on the distribution of potassium tetrafluoroborate in various tissues, male albino rats (weighing 110 to 150 g; aged 11-13 weeks) were each iv injected with 1 umol 18F-labelled potassium tetrafluoroborate... . At 120 min after injection, the following relative specific activities (activity per gram of tissue/activity in serum) were determined: liver 0.29, spleen 0.37, kidney 0.60, lung 0.60, muscle 0.14, brain 0.03, femoral diaphysis 0.26, femoral epiphysis 0.29, incisors 0.27, cranial bone 0.27, cartilage 0.30. Further relative specific activities at 30, 120, and 240 min after injection were reported for serum/total injected dose as 1.75, 0.28, and 0.07, respectively, for muscle/serum as 0.14, 0.15, and 0.35, respectively, as well as for femoral epiphysis/serum as 0.35, 0.85, and 1.35, respectively, and for femoral epiphysis/femoral diaphysis as 1.0, 2.3, and 2.4, respectively. /Potassium tetrafluoroborate/|Rats (approx 200 g; 4 animals/group) were given a single ip injection of 5 ug 18F-labelled potassium tetrafluoroborate (it was not specified whether per kg bw or per rat). After 40, 60, 100, and 120 minutes, various organs were assessed for relative specific tetrafluoroborate activity (tissue/blood specific activity ratio). ...The highest activity was found in the thyroid gland, where it was 26 to 42 fold higher than in the other organs after 2 hours. Increases in dose to 50, 500, and 1000 ug potassium tetrafluoroborate did not increase the specific activity in the thyroid gland, but reduced it relative to the values found after administration of 5 ug, e.g. by about a factor of 20, 210 minutes after 1000 ug. /Potassium tetrafluoroborate/

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. (ERG, 2016)

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim calm and warm. Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed. (ERG, 2016)

Fresh air, rest. Half-upright position. Refer immediately for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention. Apply calcium gluconate to the burn areas.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Maintain an open airway and assist ventilation if nescessary. treat coma, seizures, hypotension, and renal failure if they occur. There is no specific antidote. Administer activated charcoal (although boric acid is not well absorbed). Consider gastric lavage for large ingestions. /Boric acid, Borates, and Boron/|Hemodialysis is effective and is indicated after massive ingestions and for supportive care of renal failure. Peritoneal dialysishas not proved effective in enhancing elimination in infants. /Boric acid, Borates, and Boron/|In acute poisonings, if a large amount has been ingested and the patient is seen within one hour of exposure, gastrointestinal decontamination should be considered ... .It is important to keep in mind that vomiting and diarrhea are common, and severe poisoning may be associated with seizures. Therefore induction of emesis by syrup of ipecac is probably contraindicated in these exposures. Catharsis is not indicated if diarrhea is present. /Boric acid and Borates/|If ingestion of borate has been massive (several grams), or has extended over several days, administer intravenous glucose and electrolyte solutions to sustain urinary excretion of borate. Monitor fluid balance and serum electrolytes (including bicarbonate capacity ) regularly. Monitor cardiac status by ECG. Test the urine for proteins and cells to detect renal injury, and monitor serum concentration of borate. Metabolic acidosis may be treated with sodium bicarbonate. If shock develops, it may be necessary to infuse plasma or whole blood. Administer oxygen continuously. If oliguria (less than 25 to 30 mL urine per hour) occurs, intravenous fluids must be slowed or stopped to avoid overloading the circulation. Such patients should be referred to a center capable of providing intensive care for critically ill patients. /Boric acid and Borates/|For more Antidote and Emergency Treatment (Complete) data for FLUOBORIC ACID (7 total), please visit the HSDB record page.

/SIGNS AND SYMPTOMS/ Chronic effects: (from inhalation or ingestion), may cause fluorosis. Symptoms- weight loss, malaise, anemia, leukopenia, discoloration of teeth, osteosclerosis. /Hydrofluoric acid/|/SIGNS AND SYMPTOMS/ Contact of skin with anhydrous liquid produces severe burns that are felt immediately. Concentrated aqueous solution also cause early sensation of pain, but dilute solution may give no warning of injury. /Hydrofluoric acid/|/SIGNS AND SYMPTOMS/ All forms-dilute or concentrated solution or vapor of hydrofluoric acid (HF) ... cause severe burns. Inhalation of anhydrous HF or HF mists or vapors can cause severe respiratory tract irritation that may be fatal. /Hydrofluoric acid/|/SIGNS AND SYMPTOMS/ Effects of short-term exposure: Corrosive. The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the aerosol may cause lung edema. The effects may be delayed. /from table/|For more Human Toxicity Excerpts (Complete) data for FLUOBORIC ACID (9 total), please visit the HSDB record page.

fluoboric acid

Serious local effects and systemic effects by all routes of exposure.

Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing.

Pain. Blisters.

Redness. Pain. Severe deep burns.

60% FOR INDUSTRIAL PLATING SOLUTIONS, 20% FOR FLUOBORATE PRODUCTION, AND 20% FOR METAL TREATMENT (1976)

GRADES: Technical (approximately 48%); Pure

Computer and electronic product manufacturing|Borate(1-), tetrafluoro-, hydrogen (1:1): ACTIVE

Fluoroboric acid solutions ... are analyzed gravimetrically with the aid of nitron or by hydrolysis of the fluoroborate ion in a calcium chloride solution. A fluoroborate ion-selective electrode has been developed.

Fire Hazards -> Corrosives, Reactive - 1st degree