65294-20-4

Basic information

• Product Name: 2,2-Bis(3,4-dimethylphenyl)hexafluoropropane
• Synonyms: 1,1’-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis[3,4-dimethyl-benzen;4-[1-(3,4-Dimethylphenyl)-2,2,2-trifluoro-1-(trifluoromethyl)ethyl]-1,2-dimethylbenzene;Benzene, 1,1'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis[3,4-dimethyl-;Hexafluoro-2,2-bis-(3,4-dimethylphenyl)-propane;BIS-X-AF;2,2-BIS(3,4-DIMETHYLPHENYL)HEXAFLUOROPROPANE;4,4'-(HEXAFLUOROISOPROPYLIDENE)DI-O-XYLENE;6FDX
• CAS NO: 65294-20-4
• Molecular Formula: C₁₉H₁₈F₆
• Molecular Weight: 360.34
• EINECS: 265-687-3
• Mol File: 65294-20-4.mol
• Article Data: 7

Chemical Properties

• Melting Point: 76-78°C
• Boiling Point: 110-120°C 2mm
• Flash Point: >110°C
• Appearance: /
• Density: 1.198 g/cm³
• Vapor Pressure: 0.000349mmHg at 25°C
• Refractive Index: 1.589
• Storage Temp.: Sealed in dry,Room Temperature
• CAS DataBase Reference: 2,2-Bis(3,4-dimethylphenyl)hexafluoropropane(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2-Bis(3,4-dimethylphenyl)hexafluoropropane(65294-20-4)
• EPA Substance Registry System: 2,2-Bis(3,4-dimethylphenyl)hexafluoropropane(65294-20-4)

Safety Data

• Hazard Codes: Xi
• Safety Statements: 22-24/25
• HazardClass: IRRITANT
• Hazardous Substances Data: 65294-20-4(Hazardous Substances Data)

Usage

Chemical Properties

white crystalline powder

Uses

2,2-Bis(3,4-dimethylphenyl)hexafluoropropane can be used as a gas separation membrane due to its good separation performance and high plasticization resistance to carbon dioxide

InChI:InChI=1/C13H10BrFO/c14-9-10-2-1-3-13(8-10)16-12-6-4-11(15)5-7-12/h1-8H,9H2

Upstream product

• 95-47-6 o-xylene 
• 2379-17-1 2-(3,4-dimethylphenyl)-1,1,1,3,3,3-hexafluoro-2-propanol 
• 677-71-4 hexafluoroacetone hydrate 
• 428-59-1 Hexafluoropropene oxide 
• 684-16-2 Hexafluoroacetone 

Downstream Products

• 1107-00-2 4,4'-(1,1,1,3,3,3-hexafluoroisopropylidene)diphthalic anhydride 
• 3016-76-0 1,1,1,3,3,3-hexafluoro-2,2-di(3,4-dicarboxyphenyl)-propane 

Relevant articles and documents

INVESTIGATION OF THE HF-CATALYZED CONDENSATION REACTION TO DIARYLHEXAFLUOROPROPANES

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Preparation method of 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride

The invention discloses a preparation method of 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride. The method comprises the following steps of (a) accurately weighing N-alkyl phthalimide and a catalyst, stirring and raising the temperature to 90-110 DEG C, and dissolving; slowly dropwise adding hexafluoroacetone hydrate, raising the temperature to 100 to 130 DEG C, reacting for 22 to 80 hourswhile stirring, and discharging to obtain 4, 4-(hexafluoroisopropyl) bis (N-alkyl phthalimide); (b) adding alkali to hydrolyze, and acidifying to obtain hexafluorotetracid; and (c) dehydrating to obtain the 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride. According to the preparation method, the hexafluoroacetone and specific N-alkyl phthalimide directly react under the action of a specific catalyst to prepare hexafluorodianhydride, the step of oxidizing methyl in a traditional method is omitted, the use of metal oxides is avoided, the environmental pollution is small, a normal-pressure reaction is adopted, a high-pressure reaction is not needed, the reaction risk is reduced, the purity of the prepared 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride is high, and the yield reaches 87% or above.

Preparation method of 2,2-bis(3,4-dimethylphenyl)hexafluoropropane

The invention discloses a method used for preparing 2,2-bis(3,4-dimethylphenyl)hexafluoropropane. According to the method, 2,2-bis(3,4-dimethylphenyl)hexafluoropropane is obtained via liquid phase reaction of o-xylene with hexafluoroacetone monohydrate under the action of hydrogen fluoride. The raw materials of the method are low in toxicity; reaction pressure is low; operation is convenient; reaction selectivity and yield are high; and the method is suitable for industrialized production. 2,2-bis(3,4-dimethylphenyl)hexafluoropropane prepared via the method can be taken as an intermediate to synthesize fluorine-containing polyimide.