378-76-7

Basic information

• Product Name: potassium pentafluoropropionate
• Synonyms: potassium pentafluoropropionate;Pentafluoropropionic acid potassium salt
• CAS NO: 378-76-7
• Molecular Formula: C₃F₅O₂*K
• Molecular Weight: 202.121216
• EINECS: 206-829-6
• Mol File: 378-76-7.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 93.5°C at 760 mmHg
• Flash Point: 10.3°C
• Appearance: /
• Vapor Pressure: 35.8mmHg at 25°C
• CAS DataBase Reference: potassium pentafluoropropionate(CAS DataBase Reference)
• NIST Chemistry Reference: potassium pentafluoropropionate(378-76-7)
• EPA Substance Registry System: potassium pentafluoropropionate(378-76-7)

Safety Data

• Hazardous Substances Data: 378-76-7(Hazardous Substances Data)

Usage

InChI:InChI=1/C3HF5O2.K/c4-2(5,1(9)10)3(6,7)8;/h(H,9,10);/q;+1/p-1

Upstream product

• 426-65-3 ethyl Pentafluoropropionate 
• 10519-96-7 potassium trimethylsilonate 
• 422-64-0 pentafluoropropionic acid 

Downstream Products

• 116-14-3 polytetrafluoroethylene 
• 65538-00-3 phenyl pentafluoroethyl sulfide 
• 14038-06-3 1-methoxy-4-(pentafluoroethyl)benzene 
• 117081-46-6 4-pentafluoroethyltoluene 
• 60979-14-8 1-nitro-4-(1,1,2,2,2-pentafluoroethyl)-benzene 

Relevant articles and documents

Preparation of tetrafluoroethylene from the pyrolysis of pentafluoropropionate salts

The use of tetrafluoroethylene (TFE) in academic institutions beyond a few millimoles has often been inhibited by the compound's inherent danger and general lack of commercial availability. On the other hand, TFE is prepared industrially on a rather large scale by a number of major fluorochemical companies via the pyrolysis of chlorodifluoromethane at high temperatures, yielding TFE and HCl. For a few years at The University of Alabama and Clemson University, we have been preparing TFE on a 100+-gram scale by the pyrolysis under dynamic vacuum of pentafluoropropionate salts, which can be obtained from the neutralization of pentafluoropropionic acid with a M(OH)n (where M?=?Li, Na, K, and Cs for n?=?1 and Mg, Ca, and Ba for n?=?2). Additionally, potassium pentafluoropropionate can be prepared from the reaction of potassium trimethylsilanolate and ethyl pentafluoropropionate. The pentafluoropropionate salts and their decomposition products have been characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), accelerating rate calorimetry (ARC), nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry, Fourier transform-infrared (FTIR) spectrophotometry, scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDAX), X-ray diffraction (XRD), and single-crystal X-ray crystallography, where applicable. Typical yields of TFE obtained from pyrolysis of potassium pentafluoropropionate obtained from the acid-base neutralization method are >98%, while yields of TFE from the same salt prepared by the silanolate method from ethyl pentafluoropropionate are ca. 80%.

Preparation of anhydrous organic acid salts

One-step process for preparing anhydrous, organic acid alkali or alkaline earth metal salts by contacting and reacting an organic or polymeric acid fluoride, anhydride or ester and an organic alkali or alkaline earth metal silanolate.