128903-21-9

Basic information

• Product Name: 2,2-dichloro-1,1,1,3,3-pentafluoro-propane
• Synonyms: 2,2-dichloro-1,1,1,3,3-pentafluoro-propane
• CAS NO: 128903-21-9
• Molecular Formula: C₃HCl₂F₅
• Molecular Weight: 202.94
• Product Categories: refrigerants
• Mol File: 128903-21-9.mol

Chemical Properties

• Boiling Point: 51.4°C (estimate)
• Appearance: /
• Density: 1.5600 (estimate)
• Vapor Pressure: 209mmHg at 25°C
• Refractive Index: 1.3170 (estimate)
• CAS DataBase Reference: 2,2-dichloro-1,1,1,3,3-pentafluoro-propane(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2-dichloro-1,1,1,3,3-pentafluoro-propane(128903-21-9)
• EPA Substance Registry System: 2,2-dichloro-1,1,1,3,3-pentafluoro-propane(128903-21-9)

Safety Data

• Hazardous Substances Data: 128903-21-9(Hazardous Substances Data)

Usage

Uses

Used in Cooling Systems:
2,2-Dichloro-1,1,1,3,3-pentafluoropropane is used as a refrigerant in cooling systems due to its properties as a polyfluorinated compound.
Used in Environmental Regulation:
2,2-Dichloro-1,1,1,3,3-pentafluoropropane is classified as an environmental toxin contributing to ozone depletion. It is listed on the US EPA Toxic Release Inventory (TRI) list, indicating the need for regulation and monitoring of its use and release into the environment.

Air & Water Reactions

Slightly soluble in water.

Reactivity Profile

2,2-dichloro-1,1,1,3,3-pentafluoro-propane is chemically inert in many situations, but can react violently with strong reducing agents such as the very active metals and the active metals. They suffer oxidation with strong oxidizing agents and under extremes of temperature.

InChI:InChI=1/C3HCl2F5/c4-2(5,1(6)7)3(8,9)10/h1H

Upstream product

• 507-55-1 1,3-dichloro-1,1,2,2,3-pentafluoropropane 
• 677-21-4 1,1,1-trifluoropropylene 
• 75-45-6 Chlorodifluoromethane 
• 79-38-9 Chlorotrifluoroethylene 

Downstream Products

• 422-55-9 1-chloro-1,1,2,2,3,3-hexafluoropropane 
• 422-56-0 3,3-dichloro-1,1,1,2,2-pentafluoropropane 
• 422-47-9 2,3,3-trichloro-1,1,1,2-tetrafluoropropane 

Relevant articles and documents

PROCESS FOR PRODUCING 1, 1-DICHLORO-2, 2, 3, 3, 3-PENTAFLUOROPROPANE

To provide a process for producing, at a high content ratio, 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) which is useful as e.g. a starting material to obtain 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO1214ya). The process for producing HCFC-225ca of the present invention comprises subjecting a raw material composed of dichloropentafluoropropane (HCFC-225) including 2,2-dichloro-1,1,1,3,3-pentafluoropropane (HCFC225aa) to an isomerization reaction at a temperature of at most 290° C. in a gas phase in the presence of a metal oxide catalyst thereby to isomerize HCFC-225aa to HCFC-225ca.

METHOD FOR PRODUCING 1, 1-DICHLORO-2,2,3,3,3-PENTAFLUOROPROPANE

To provide a method for producing 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) at a high content ratio, which is useful as e.g. a starting material to obtain 1,1-dichloro-2,3,3,3-tetrafluoropropene (R1214ya). The method comprises subjecting a starting material comprising one isomer or a mixture of at least two isomers of dichloropentafluoropropane (HCFC-225) and having a HCFC-225ca content of less than 60 mol%, to an isomerization reaction in the presence of a Lewis acid catalyst or a metal oxide catalyst so as to increase the HCFC-225ca content in the product to be higher than the content in the starting material.

PROCESSES FOR THE PRODUCTION OF FLUOROPROPANES AND HALOPROPENES

A process is disclosed for making CF3CF2CH3, CF3CF=CH2 and/or CF3CCI=CH2. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CH2CH2X, halopropenes of the formula CX3CH=CH2 and halopropenes of the formula CX2=CHCH2X, wherein each X is independently F or Cl, with HF and CI2 in a reaction zone to produce a product mixture comprising HF, HCI, CF3CF2CH3, CF3CF=CH2, and CFsCCI=CH2; and recovering the CF3CF2CH3, CF3CF=CH2 and/or CFsCCI=CH2 from the product mixture. Also disclosed is a process for making CF3CH2CHF2, CFsCH=CHF, and/or CFaCH=CHCI. This process involves reacting at least one starting material selected from the group consisting of halopropenes of the formula CX3CH=CH2 and halopropenes of the formula CX2=CHCH2X, wherein each X is independently F or Cl, with HF and CI2 in a reaction zone to produce a product mixture comprising HF, HCI, CF3CH2CHF2, CFsCH=CHF and CF3CH=CHCI; and recovering the CF3CH2CHF2, CFsCH=CHF, and/or CF3CH=CHCI from the product mixture. The molar ratio of HF to the total amount of starting materials fed to the reaction zone for both of these processes is at least stoichiometric, and the molar ratio of Cl2 to total amount of starting material fed to the reaction zone for both of these processes is 2:1 or less.

19F nuclear magnetic resonance studies of halogenated propanes

The relationship between 19F chemical shifts in halogenated propanes and their structures are elucidated using MNDO calculations to determine the population of rotamers.The pairs of atom gauche to a fluorine atom and van der Waals interaction between the two terminal substituents are responsible for the 19F chemical shifts.The differences among chemical shifts in diastereomers are also discussed in terms of the conformation of molecule.