335-70-6

Basic information

• Product Name: 1,8-Diiodoperfluorooctane
• Synonyms: HEXADECAFLUORO-1,8-DIIODOOCTANE;1,8-DIIODOPERFLUOROOCTANE;1,8-Diiodoperfluorooctane 98%;1,8-Diiodoperfluorooctane98%;Perfluoro-1,8-diiodooctane 98%;Hexadecafluoro-1,8-diiodooctane 98%;Perfluoro-1,8-diiodooctane98%
• CAS NO: 335-70-6
• Molecular Formula: C₈F₁₆I₂
• Molecular Weight: 653.87
• Product Categories: Alkyl;Halogenated Hydrocarbons;Organic Building Blocks;Alkyl Fluorinated Building Blocks;Building Blocks;Chemical Synthesis;Fluorinated Building Blocks;Halogenated Hydrocarbons;Organic Building Blocks;Organic Fluorinated Building Blocks;Other Fluorinated Organic Building Blocks
• Mol File: 335-70-6.mol
• Article Data: 5

Chemical Properties

• Melting Point: 73-77 °C(lit.)
• Boiling Point: 112°C 25mm
• Flash Point: 98.5 °C
• Appearance: /
• Density: 2.2482 (estimate)
• Storage Temp.: 2-8°C
• Solubility: Chloroform (Slightly), Methanol (Slightly)
• CAS DataBase Reference: 1,8-Diiodoperfluorooctane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,8-Diiodoperfluorooctane(335-70-6)
• EPA Substance Registry System: 1,8-Diiodoperfluorooctane(335-70-6)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 36
• WGK Germany: 3
• HazardClass: IRRITANT
• Hazardous Substances Data: 335-70-6(Hazardous Substances Data)

Usage

Uses

1,8-Diiodoperfluorooctane (CAS# 335-70-6) is a perfluoroalkane used in the synthesis of semifluorinated polymers, and other perflourinated species.

Upstream product

• 116-14-3 polytetrafluoroethylene 
• 375-50-8 1,1,2,2,3,3,4,4-octafluoro-1,4-diiodobutane 
• 354-65-4 1,2-diiodotetrafluoroethane 

Downstream Products

• 307-99-3 1H,8H-perfluorooctane 
• 130028-67-0 1,8-bis(4-fluorophenylthio)perfluorooctane 
• 888616-05-5 N-[1-(dodecylcarbamoyl)-4-(tert-butyloxycarbonylamino)butyl]-22-(benzyloxycarbonylamino)-12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19-hexadecafluorodocosanamide 
• 888615-90-5 22-N-(benzyloxycarbonylamino)-10,21-diiodo-12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19-hexadecafluorodocosanoic acid 
• 888615-92-7 22-N-(benzyloxycarbonylamino)-12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19-hexadecafluorodocosanoic acid 
• 936553-14-9 o-tol2P(CH₂)3(CF₂)8(CH₂)3Po-tol2 
• 936553-06-9 p-tol2P(CH₂)3(CF₂)8(CH₂)3Pp-tol2 
• 678-45-5 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluorooctanedioic acid 

Relevant articles and documents

TELOMERIZATION OF TETRAFLUOROETHYLENE AND HEXAFLUOROPROPENE: SYNTHESIS OF DIIODOPERFLUOROALKANES

Linear diiodoperfluoroalkanes are easily synthesized by thermal telomerization of tetrafluoroethylene with iodine.When hexafluoropropene reacts with I(C2F4)nI n = 2,3,4 as telogen, new diiodocompounds of formula I(C3F6)m(C2F4)n(C3F6)pI n = 2,3,4 m = 0,1,2 p = 1,2 are obtained.In both cases there are high yields, based both on iodine and on olefin.

A Convenient One-Stage Synthesis of Some Diiodoperfluoroalkanes By Using Tetrafluoroethylene Derived From Poly(tetrafluoroethylene) Waste

Tetrafluoroethylene was prepared by a thermal depolymerization of poly(tetrafluoroethylene) waste.The gaseous mixture containing 95-97percent tetrafluoroethylene has been used without further purification in a direct reaction with iodine to synthesize some α,ο-diidoperfluoroalkenes at temperature 285+/-5 deg C for 8 h.Stoichiometric one to one ratio of the reagents has been found to produce higher diidoperfluoroalkenes yield per unit reaction volume than synthesis in the presence of an excess of tetrafluoroethylene.This approach provides a rapid one-pot procedure to these valuable reagents without any dangerous step.

SOLVENT EFFECTS IN BETWEEN PERFLUOROALKYLIODIDES AND CADMIUM

The interaction between perfluoroorgano iodides (RfI where Rf = F(CF3)2C(CF2CF2)3, n-C6F13, n-C8F17, F(CF3)2COCF2CF2, F(CF3)2CO(CF2CF2)4 and C2H5OC(O)(CF2CF2)2OCF2CF2) with cadmium in an acetonitrile solvent media produces primarily the coupled products (RfRf, 72-90percent yield) in addition to minor quantities of the reduction products (RfH).On the other hand ICF2CF2I and ClCF2CFClI, by a 1,2-dehalogenation reaction, from the olefins CF2=CF2 and CF2=CFCl, respectively, as the principal products.The interaction of RfI compounds with cadmium in other solvent media, e.g. diethyl ether, tetrahydrofuran (YHF)), N,N-dimethylformamide (DMF), and bis(2-methoxyethyl)ether(diglyme) were examined and found to produce a different ratio of RfRf and RfH products.