685-63-2

Basic information

• Product Name: HEXAFLUORO-1,3-BUTADIENE
• Synonyms: HEXAFLUOROBUTA-1,3-DIENE;HEXAFLUOROBUTADIENE-1,3;HEXAFLUORBUTADIENE-1,3;HEXAFLUORO-1,3-BUTADIENE;1,1,2,3,4,4-Hexafluoro-1,3-butadiene;1,1,2,3,4,4-hexafluoro-3-butadiene;1,1,2,3,4,4-hexafluoro-buta-1,3-diene;1,1,2,3,4,4-hexafluorobuta-1,3-diene
• CAS NO: 685-63-2
• Molecular Formula: C₄F₆
• Molecular Weight: 162.03
• EINECS: 211-681-0
• Mol File: 685-63-2.mol
• Article Data: 47

Chemical Properties

• Melting Point: -132°C
• Boiling Point: 6-7°C
• Appearance: Colorless, odorless liquefied gas
• Density: 1.553
• Vapor Pressure: 954mmHg at 25°C
• Refractive Index: 1.378
• Water Solubility: 230.5mg/L at 20℃
• CAS DataBase Reference: HEXAFLUORO-1,3-BUTADIENE(CAS DataBase Reference)
• NIST Chemistry Reference: HEXAFLUORO-1,3-BUTADIENE(685-63-2)
• EPA Substance Registry System: HEXAFLUORO-1,3-BUTADIENE(685-63-2)

Safety Data

• Hazard Codes: F
• Statements: 11
• Safety Statements: 16-23-33
• RIDADR: 3161
• Hazardous Substances Data: 685-63-2(Hazardous Substances Data)

Usage

Flammability and Explosibility

Flammable

InChI:InChI=1/C4F6/c5-1(3(7)8)2(6)4(9)10

Upstream product

• 375-42-8 1,4-dibromo-2,3-dichloro-1,1,2,3,4,4-hexafluorobutane 
• 384-49-6 3H-hexafluoro-4-iodo-but-1-ene 
• 357-21-1 3,4-dichlorohexafluoro-1-butene 
• 376-42-1 3,4-dichloro-hexafluoro-adipic acid 
• 375-45-1 perfluoro-1,2,3,4-tetrachlorobutane 
• 375-27-9 1,2-dibromo-3,4-dichloro-1,1,2,3,4,4-hexafluoro-butane 
• 336-08-3 perfluoroadipic acid 
• 677-47-4 1-iodo-1,2-difluoro-1,2,2-trichloroethane 
• 354-61-0 1,2-dichloro-1,2,2-trifluoro-1-iodoethane 
• 359-37-5 Iodotrifluoroethylene 
• 559-40-0 octaperfluorocyclopentene 
• 355-75-9 decafluorocyclohex-1-ene 
• 148121-33-9 octadecafluoro<1-vinyl-2-(1-vinyl-2-cyclobutyl)cyclobutane> 
• 1542-14-9 3,3,4,5,6,6-hexafluoro-3,6-dihydro-1,2-dithiin 

Downstream Products

• 375-24-6 1,2,3,4-tetrabromo-hexafluoro-butane 
• 360-87-2 1,4-dibromohexafluoro-2-butene 
• 697-11-0 hexafluorocyclobut-1-ene 
• 26579-97-5 2-methoxy-2-butenedioic acid dimethyl ester 
• 353-50-4 Carbonyl fluoride 
• 667-49-2 2,3,3-trifluoroacryloyl fluoride 
• 19721-29-0 1,2,3,3-tetrafluorocyclopropene 
• 426-03-9 difluoronitroacetic acid 
• 78889-48-2 4-(p-methoxyphenyl)-1,2,3,3,6,6-hexafluoro-1-cyclohexene 
• 78558-84-6 cis-1-tetrafluoroethylidene-2-(p-methoxyphenyl)-4,4-difluorocyclobutane 
• 78558-85-7 trans-1-tetrafluoroethylidene-2-(p-methoxyphenyl)-4,4-difluorocyclobutane 
• 78558-83-5 trans-1-trifluorovinyl-2-(p-methoxyphenyl)-1,4,4-trifluorocyclobutane 
• 78558-86-8 1-(2-hydroperfluoroethyl)-2-(p-methoxyphenyl)-4,4-difluoro-1-cyclobutene 
• 4827-67-2 perfluoro-(3,6-dihydro-2-methyl-2H-1,2-oxazine) 

Relevant articles and documents

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Preparation method of hexafluoro-1, 3-butadiene

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of hexafluoro-1, 3-butadiene. The method comprises the following steps: cracking R22 used as a raw material to prepare TFE, preparing TFE and Br2 according to a certain ratio under certain conditions to generate dibromotetrafluoroethane, and reacting dibromotetrafluoroethane with TFE at certain temperature under the conditions of zinc powder and a DMF-toluene combined solvent to prepare the hexafluoro-1, 3-butadiene. After the reaction, a gas phase sample is collected and analyzed by GC chromatography, and the proportion of hexafluoro-1, 3-butadiene accounts for more than 85%. The method has the advantages of simple and accessible raw materials, low price, simple and safe technical preparation process, high product yield and the like.

Preparation method of hexafluorobutadiene

The invention relates to a preparation method of hexafluorobutadiene, and belongs to the technical field of fluorine-containing gas preparation. The preparation method comprises the following steps: preparing a polar base solution, activated zinc and 1,2-dichloro2iodo-1,1,2-trifluoroethane, further preparing 1,2,3,4-tetrachlorohexafluorobutane, and finally preparing hexafluorobutadiene. Accordingto the method, activated zinc is used in the preparation process and is matched with a polar base solution serving as a solvent, so that the reaction rate is increased, the yield and selectivity of 1,2,3,4-tetrachlorohexafluorobutane are guaranteed; therefore, the problem that the reaction rate is influenced by using zinc particles which are not activated and have larger particles and adopting a solvent with poorer polarity in the prior art is solved; in addition, a non-polar solvent and activated zinc are added in the preparation of hexafluorobutadiene, so that byproducts generated in the preparation process of hexafluorobutadiene are easier to separate while the yield and selectivity of hexafluorobutadiene are ensured.