Fluoboric acid

  • Fluoroboric acid
  • Tetrafluoroboric acid
  • Hydrogen tetrafluoroborate
  • Borate(1-), tetrafluoro-, hydrogen
Formula
HBF4
Structure
Description
A colorless odorless poisonous liquid.
Uses
As catalyst for preparing acetals, esterifying cellulose, to clean metal surfaces before welding, to brighten aluminum, reagent for sodium in presence of magnesium & potassium ions, as solute in electrolytes for plating metals such as chromium, iron, nickel, copper, silver, zinc, cadmium, indium, tin, & lead (has high throwing power), reagent for sodium in the presence of magnesium and potassium ions, for making stabilized diazo salts (diazonium & tetrazonium fluoborates), 0.1-0.5% Soln retards fermentation.

Registry Numbers and Inventories.
CAS
16872-11-0
EC (EINECS/ELINCS)
240-898-3
EC Index Number
009-010-00-X
EC Class
Corrosive
S 26 27 45
RTECS
ED2685000
RTECS class
Other
UN (DOT)
1775
Merck
13,4175
Beilstein/Gmelin
21702 (G)
Swiss Giftliste 1
G-1628
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
BF4H
Formula mass
87.81
Melting point, °C
-90
Boiling point, °C
130
Vapor pressure, mmHg
5
Vapor density (air=1)
3
Evaporization number
1 (butyl acetate=1)
Density
1.41 g/cm3
Solubility in water
Miscible

Hazards and Protection.
Storage
Pure HBF4 (fluoroboric acid) may be stored in glass vessels at room temperature.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Neutralize spilled material with crushed limestone, soda ash, or lime. Apply water spray or mist to knock down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment. 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 agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3).
Stability
No data.
Incompatibilities
Reacts exothermically with chemical bases (examples: amines, amides, and inorganic hydroxides) Reacts with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas Reacts with cyanide compounds to release gaseous hydrogen cyanide.
Decomposition
The toxic action of the halogenated borons is considerably influenced by their decomposition products (hydrofluoric acid-, fluoboric acid-, hydrochloric acid-).

Fire.
Fire fighting
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.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
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.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as Fluorides, as F): ppm; 2.5 mg/m3 (as TWA) (ACGIH 1994-1995).
Poison_Class
2
Exposure effects
Significant ingestions or dermal exposures can be associated with weak, rapid pulse, cyanosis and abnormally low blood pressure. The patient may present with reduced body temperature, elevated body temperature or normal body temperature. Headache, lethargy, restlessness, weakness, CNS irritation, and/or seizures may occur with long term or repeated exposures. There is insufficient information concerning the reproductive effects of borates in humans. Adverse testicular effects and infertility have been reported in animals. <br>There have been limited animal studies which suggest decreased ovulation, fetotoxicity and developmental defects may occur with very high exposure levels. Maternal toxicity was present in some studies.
   Ingestion
Nausea, vomiting, and diarrhea are common. The vomitus and feces may be blue-green in color. Hemorrhagic gastroenteritis can occur.
   Inhalation
Dyspnea, bronchospasm (with abnormal pfts and hypoxia), chemical pneumonitis, pulmonary edema (can be hemorrhagic), tracheobronchitis, upper airway obstruction, chemical burns (larynx, trachea, bronchi) and ards may occur following inhalation.
   Skin
The oral mucosa, lips and throat may be red. Erythematous rash with desquamation (cooked lobster syndrome) may develop on the palms, soles, and buttocks. A generalized rash has also been reported.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce 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.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1775
Response guide
Hazard class
8
Packing Group
II
 
Std. Transport #
4930222