Boron trifluoride(BF3)/CAS:7637-07-2

Product Name: Boron trifluoride

Abbreviation: BF3

Synonyms: BORON TRIFLUORIDE;BORON TRIFLUORIDE (~10% (~1.3 M) IN 1-BUTANOL);BORON TRIFLUORIDE CYL. WITH 2 L (NET ~1. 2 KG);BORON TRIFLUORIDE CYL.WITH 5 L (NET~3KG);Boron Trifluoride Anhydrous;BoronTrifuoride;boron trifluoride - butanol reagent

CAS: 7637-07-2

Molecular formula: BF3

Molecular weight: 67.81

Einecs: 231-569-5

Dangerous goods transport number: 1008

Structural formula：

product details

BRIEF DESCRIPTION

Boron trifluoride is the inorganic compound with the formula BF3. It is a highly toxic, colorless and nonflammable gas with a penetrating and pungent odor. It dissolves quickly in water and any organic compounds containing nitrogen or oxygen. It can be slowly hydrolyzed by cold water to give off hydrofluoric acid, and can also hydrolyzes to form white dense fumes in moist air. Its vapors are heavier than air. Inhaling the gas will irritate the respiratory system and burns can result if the gas touches the skin in high concentrations.

TECHNICAL INDICATORS

Analysis	Requirement
Appearance	Colorless Liquid
Purity(% by weight)	99.999
Boiling Point 101.3 KPa (℃)	-100
Melting Point (℃)	-127
Density-70℃(g/cm³)	1.433
Flash Point (℃)	4

USE

Boron trifluoride is used as a catalyst for polymerizations, alkylations, and condensation reactions; To protect molten magnesium and its alloys from oxidation; as a gas flux for internal soldering or brazing; in ionization chambers for the detection of weak neutrons; and as a source of B10 isotope. By far the largest application of boron trifluoride is in catalysis with and without promoting agents.

Boron trifluoride is the most widely used boron halide. Most applications take advantage of its strong Lewis acidity. The most important uses are in organic syntheses. Boron trifluoride is commonly used as a catalyst for Friedel-Crafts alkylation reactions. It also is used to catalyze the cleavage of ethers to alcohols, to catalyze esterification reactions, and in the nitration and sulfonation of aromatic compounds. Many olefin polymerization reactions use BF3 as an initiator, in conjunction with a proton donor, such as water. Also BF3 is used to catalyze the isomerization of alkenes and alkanes and in petroleum cracking and desulfurization. Amine complexes of BF3 are used as epoxy curing agents.

STORAGE CONDITIONS

1. Store in cool and well-ventilated special warehouse, away from high temperature and heat source. The temperature in the warehouse should not exceed 30℃. Keep the container sealed.

2. It should be stored separately from alcohols, alkalis, water and water-containing substances, alkali metals, alkaline earth metals, alkyl nitrate, edible chemicals, etc., and should not be mixed. The storage area should be equipped with leak emergency treatment equipment and suitable containment materials.

3. Seamless aluminum alloy cylinders containing boron trifluoride should be painted silver gray and marked with black characters. Must have a safety cover, and the bottle must be wrapped with a rubber band or straw rope. Gas cylinders should be stored in low-temperature, well-ventilated places, away from the sun, away from high-temperature objects; The tank body of the tank car is painted silver gray, and has a clear blue lettering.

4. It is prohibited to set up storage tank equipment and treatment devices near densely populated areas such as schools, hospitals, residential areas, and away from frequent access points and emergency passageways.

5. The system of "two persons receiving and receiving, two persons keeping" of highly toxic chemicals shall be strictly implemented.

PACKAGE

Pack as recommended by the manufacturer, e.g. open steel drums. Ampoule bottle outside ordinary wooden case. Threaded glass bottles, iron lid pressed glass bottles, plastic bottles or metal barrels (cans) outside ordinary wooden cases, etc.

CHEMICAL PROPERTIES

1. Reaction with elements - alkali metal and alkaline earth metal can reduce boron trifluoride, and the reduction reaction product is elemental boron and metal fluoride. Gaseous or liquid boron trifluoride will not react even when exposed to mercury or chromium at high pressure for a long time. Red hot iron is also impervious to boron trifluoride.

2. Reaction with oxide, let boron trifluoride react with hydrated lime, calcium borate and calcium fluoborate will be generated, and the reaction is exothermic. React with anhydrous calcium oxide or magnesium oxide to form metal fluoride and volatile boron fluoride oxide.

3. When heated to 500 ℃ by the reaction with halides, boron trifluoride does not react with boron trichloride. Aluminum chloride or aluminum bromide can react with boron trifluoride under slightly heated conditions to produce the corresponding boron halide and aluminum fluoride. When boron trifluoride was passed through solid copper chloride, silver chloride or potassium chloride at 0.101 MPa(1atm), the temperature rose from -75 ℃ to 530 ℃, and no coordination compounds were found.

4. Alkyl boron The dried boron trifluoride is fed into a suitable alkyl glia reagent and then distilled in nitrogen to produce the required alkyl boron.

5. Aryl boron is similar to alkyl boron and such compounds have been prepared.

6. Catalyst Because boron trifluoride is an electrophilic compound, it can be used as an acid catalyst. Boron trifluoride can catalyze many types of reactions. These reactions include esterification, nitration, oxidation, reduction, halogenation and so on.

7. Boron trifluoride can be composed of molecular compounds with many different kinds of compounds, such as alcohols, ethers, anhydrides, ketones, aldehydes, amines, etc. In addition, it can also form 1:1 molecular complexes with hydrogen sulfide, sulfur dioxide and mercaptan.

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