聚偏氟乙烯

Description

poly(vinylidene fluoride) · CAS 24937-79-9 · C2H2F2. UNII 3C1IX2905B. Boiling Point: -123 °F at 760 mmHg (NTP, 1992); Boiling Point: -85.7 °C; Boiling Point: -83 °C.

Identification

CAS Registry Number	24937-79-9
PubChem CID	6369
Molecular formula	C2H2F2
IUPAC name	1,1-difluoroethene
UNII (FDA)	3C1IX2905B

Computed Descriptors

Molecular Weight	64.03
XLogP3	1.3
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	64.01245639
Monoisotopic Mass	64.01245639
Topological Polar Surface Area	0
Heavy Atom Count	4
Formal Charge	0

Physical & Chemical Properties

Boiling Point	-123 °F at 760 mmHg (NTP, 1992)
Boiling Point	-85.7 °C
Boiling Point	-83 °C
Boiling Point	-123 °F
Boiling Point	-122 °F
Melting Point	-227 °F (NTP, 1992)
Melting Point	-144 °C
Melting Point	-227 °F
Solubility	In water, 164.9 mg/L at 25 °C
Density	0.617 g/cc at 24 °C (liquid)

Physical description & handling notes

• 1,1-Difluoroethylene (or vinylidene fluoride) is a colorless gas which is flammable in the ranges of 5.5 to 21%. It is toxic by inhalation and contact. It is slightly soluble in water and soluble in alcohol and ether. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.
• Liquid; CBI; Gas Vapor
• Colorless gas with a faint, ethereal odor; Note: Shipped as a liquefied compressed gas; [NIOSH]
• COLOURLESS COMPRESSED LIQUEFIED GAS WITH CHARACTERISTIC ODOUR.
• Colorless gas with a faint, ethereal odor.
• Colorless gas with a faint, ethereal odor. [Note: Shipped as a liquefied compressed gas.]

Regulatory Status

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS
GHS notification summary	3.3% (12 / 362)

GHS Hazard Classification

GHS notification summary	3.3% (12 / 362)
Reported hazard statements	H220 (96.1%), H230 (28.7%), H280 (96.7%), H340 (11%), H350 (11%), H336

Documented Uses

• Used in the production of polyvinylidene fluoride polymers and elastomers; [HSDB]
• Plastic Composites Manufacturing [Category: Industry]
• Manufacture of polymers and copolymers; chemical intermediate
• Used for the mfg of poly(vinylidene fluoride) and for copolymerization with many fluorinated monomers. One commercially significant use is the mfg of high performance fluoroelastomers that include copolymers of 1,1-difluorothene with hexafluoropropylene (HFP) or chlorotrifluoroethylene (CTFE) and terpolymers with HFP and tetrafluoroethylene
• Currently, three basic methods are used for the commercial production: (1) dechlorination of 1,2-dichloro-1,1-difluoroethane in the gas phase and on a metal catalyst, (2) dechlorination of 1-chloro-1,1-difluoroethane, and (3) dehydrofluorination of 1,1,1-trifluoroethane.
• Thermal elimination of HCl from 1-chloro-1,1-difluoroethane is the principal industrial route...dehydrohalogenation of 1-bromo-1,1-difluoroethane or 1,1,1-trifluoroethane, or dehalogenation of 1,2-dichloro-1,1-difluoroethane are alternative routes; it can also be continuously prepared by the pyrolysis of trifluoromethane in the presence of a catalyst and either methane or ethylene.

Synonyms

Vinylidene fluoride; 1,1-Difluoroethylene; 1,1-DIFLUOROETHENE; 75-38-7; Vinylidene difluoride; Ethene, 1,1-difluoro-; Ethylene, 1,1-difluoro-; Genetron 1132a; Halocarbon 1132A; NCI-C60208; NCI-C60204; UN1959; 3C1IX2905B; DTXSID3021439; Difluoro-1,1-ethylene; RefChem:6353

Frequently Asked Questions

What are the CAS number and molecular formula of poly(vinylidene fluoride)?

CAS 24937-79-9; molecular formula C2H2F2; molecular weight — g/mol.

What other names is poly(vinylidene fluoride) known by?

Vinylidene fluoride, 1,1-Difluoroethylene, 1,1-DIFLUOROETHENE, 75-38-7, Vinylidene difluoride, Ethene, 1,1-difluoro-.

What is the regulatory status of poly(vinylidene fluoride)?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is poly(vinylidene fluoride) classified as hazardous?

3.3% of GHS notifications report no hazard classification (12 of 362).

What are the key physical properties of poly(vinylidene fluoride)?

Boiling Point: -123 °F at 760 mmHg (NTP, 1992); Boiling Point: -85.7 °C; Boiling Point: -83 °C; Boiling Point: -123 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.