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133531-78-9

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133531-78-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133531-78-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,3 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 133531-78:
(8*1)+(7*3)+(6*3)+(5*5)+(4*3)+(3*1)+(2*7)+(1*8)=109
109 % 10 = 9
So 133531-78-9 is a valid CAS Registry Number.

133531-78-9Relevant articles and documents

Monodisperse perfluoro-polyethoxylated amphiphilic compounds with two-chain polar head - Preparation and properties

Selve,Ravey,Stebe,El Moudjahid,Moumni,Delpuech

, p. 411 - 428 (1991)

Monodisperse new surfactant molecules with a two-chain polyoxyethylene (EO) hydrophilic head and a perfluoroalkyl hydrophobic moiety linked together through an amide bond are synthesized by methods allowing large-scale production. Surface tension measurements (γ ~ 20 mN·m-1) show slow organization of the surfactant film at the water/air interface for longer fluorocarbon tail. Values of critical micellar concentrations and comparisons with monosubstituted amide surfactants are consistent with a high hydrophilicity of the amide function, a small influence of branching over hydrophilicity, and a hydrophobicity of each CF2 unit equivalent to 1.7 methylenes (in the analogous hydrogenated surfactants).

Synthesis of Novel Perfluoroalkyl Nonionic Surfactants with a Bipodal Hydrophilic Moiety

Selve, Claude,Moumni, El Mostafa,Delpuech, Jean-Jacques

, p. 1437 - 1438 (2007/10/02)

Monodisperse perfluoroalkyl N,N'-polyethoxylated amides, synthesized as dimethyl ether derivatives, CnF(2n+1)CH2C(O)N(mMe)2 are efficient bipodal nonionic fluorinated surfactants.

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