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670256-87-8

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670256-87-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 670256-87-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,0,2,5 and 6 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 670256-87:
(8*6)+(7*7)+(6*0)+(5*2)+(4*5)+(3*6)+(2*8)+(1*7)=168
168 % 10 = 8
So 670256-87-8 is a valid CAS Registry Number.

670256-87-8Upstream product

670256-87-8Downstream Products

670256-87-8Relevant articles and documents

Difluorphos, an Electron-Poor Disphosphane: A Good Match between Electronic and Steric Features

Jeulin, Severine,De Paule, Sebastien Dupart,Ratovelomanana-Vidal, Virginie,Genet, Jean-Peirre,Champion, Nicolas,Dellis, Philippe

, p. 320 - 325 (2007/10/03)

The π acidity makes the difference: The fluorinated diphosphane, difluorphos, is synthesized (see structure: purple = P, red = O, green = F, gray = C) and its stereoelectronic features are evaluated in theoretical and experimental studies. Its unusual π acidity explains the excellent results obtained with it in ruthenium-mediated asymmetric hydrogenation of fluorinated β-functionalized ketones. These results are better than those obtained with other biphenyl-based diphosphanes.

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