Molecular Formula | CoF3 |
Molar Mass | 115.93 |
Density | 3.88g/mLat 25°C(lit.) |
Melting Point | 927°C |
Water Solubility | Insoluble in water. |
Appearance | Powder |
Specific Gravity | 3.88 |
Color | Light brown |
Exposure Limit | ACGIH: TWA 0.02 mg/m3; TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
Merck | 14,2430 |
Stability | hygroscopic |
Sensitive | Hygroscopic |
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.) |
UN IDs | UN 3260 8/PG 2 |
WGK Germany | 3 |
FLUKA BRAND F CODES | 21 |
TSCA | Yes |
HS Code | 28261990 |
Hazard Note | Toxic/Corrosive/Oxidiser |
Hazard Class | 5.1 |
Packing Group | III |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Use | cobalt trifluoride can react with water and is a very strong fluorinating and oxidizing agent, it is widely used as a fluorinating agent. |
trait | light brown powder. |
physical properties | cobalt trifluoride (chemical formula: CoF3), unstable light brown deliquescent solid at room temperature, density of 3.88g/mL(25 ° C), soluble in water to release oxygen, is a very commonly used fluoride agent. When heated to 250 °c in a stream of CO2, the evolution of F2 begins, and at 350 °c, the transition to CoF2 is complete. The chlorine of the same group with fluorine can also generate a binary compound of cobalt, but it is very unstable. When cobalt trioxide is dissolved in hydrochloric acid, chlorine gas will be released. Cobalt bromide and cobalt iodide were never prepared. cobalt trifluoride can react with many simple metals or nonmetals to form the corresponding fluoride, which itself is reduced to cobalt difluoride. Cobalt trifluoride also has hydrate, CoF3 · 3.5H2O, but the structure is not clear |
reaction | cobalt trifluoride can react with many metallic or non-metallic elements to form the corresponding fluoride, which itself is reduced to cobalt difluoride. Cobalt trifluoride also has a hydrate, CoF3 · 3.5 H2O, but the structure is not clear. when the organic compound is fluorinated with cobalt trifluoride, cobalt trifluoride is first produced by reacting cobalt difluoride with fluorine gas at about 300 ° C., and then an organic reactant is introduced to react with cobalt trifluoride. Cobalt difluoride formed after reduction of cobalt trifluoride can be recycled. Fluorination reaction involves single electron transfer and carbocation intermediate mechanism: this reaction is usually used for the preparation of perfluorinated organic compounds. The oxidation of cobalt trifluoride is strong, and the general reaction is carried out in the gas phase, without solvent or with anhydrous hydrogen fluoride as the medium, often accompanied by rearrangement or other side reactions,[1] Fluorination with the relevant KCoF4 results in enhanced selectivity of the reaction [3]. C- H bonds of all hydrocarbons can be converted to C- F bonds at around 400°C, and fluorine can also be added to the unsaturated bonds. 2CoF3 R-H → CoF2 R-F HF |
stability | when cobalt trifluoride is heated to 250 °c in a CO2 gas stream, F2 begins to evolve, and at 350 °c, then it is completely converted to cof2. |
synthesis method | a quartz boat containing CoF2 was placed in a quartz reaction tube, and F2 was introduced from one end of the reaction tube, when the reaction tube is heated to about 75 ° C., the reaction becomes violent due to the exotherm of the reaction, the temperature slowly rises to 200 ° C., and the product is cooled in the flow of F2; finally, the excess F2 was purged with a nitrogen stream. The fluorination reaction was carried out in the same apparatus as before, and the anhydrous CoCl2 or Co2O3 was used in the quartz boat. The reaction tube was gradually heated to 300 ° C. From room temperature, this temperature was maintained until F2 was evolved at the end of the reaction tube, and the excess F2 in the apparatus was then driven off with dry nitrogen. |
production method | a quartz boat containing CoF2 was placed in a quartz reaction tube, and F2 was introduced from one end of the reaction tube, when the reaction tube is heated to about 75 ° C., the reaction becomes violent due to the exotherm of the reaction, the temperature slowly rises to 200 ° C., and the product is cooled in the flow of F2; finally, the excess F2 was purged with a nitrogen stream. The fluorination reaction was carried out in the same apparatus as before, and the anhydrous CoCl2 or Co2O3 was used in the quartz boat. The reaction tube was gradually heated to 300 ° C. From room temperature, this temperature was maintained until F2 was evolved at the end of the reaction tube, and the excess F2 in the apparatus was then driven off with dry nitrogen. |
category | corrosive substance |
flammability hazard characteristics | non-combustible; Reaction with water to generate toxic corrosive hydrogen fluoride gas |
storage and transportation characteristics | low temperature, ventilated, dry; Sealed storage; Moisture |
fire extinguishing agent | carbon dioxide, foam, dry powder |