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128912-44-7

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128912-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128912-44-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,1 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128912-44:
(8*1)+(7*2)+(6*8)+(5*9)+(4*1)+(3*2)+(2*4)+(1*4)=137
137 % 10 = 7
So 128912-44-7 is a valid CAS Registry Number.

128912-44-7Relevant articles and documents

Synthesis and Characterisation of some 1,4,8,11,15,18,22,25-Octa-alkyl- and 1,4,8,11,15,18-Hexa-alkyl-22,25-bis(carboxypropyl)phthalocyanines

McKeown, Neil B.,Chambrier, Isabelle,Cook, Michael J.

, p. 1169 - 1177 (2007/10/02)

A series of 3,6-dialkylphthalonitriles and 3,6-bis(4,4,4-trimethoxybutyl)phthalonitrile have been prepared via Diels-Alder reactions of 2,5-disubstituted furans or thiophene 1,1-dioxides with fumaronitrile.The phthalonitriles were converted into the title phthalocyanines as metal-free and copper(II) derivatives.The macrocycles were characterised using 1H NMR and optical spectroscopy, and fastatom bombardment spectrometry.Certain examples exhibit discotic liquid crystal behaviour.

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