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131525-59-2

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131525-59-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131525-59-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,2 and 5 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 131525-59:
(8*1)+(7*3)+(6*1)+(5*5)+(4*2)+(3*5)+(2*5)+(1*9)=102
102 % 10 = 2
So 131525-59-2 is a valid CAS Registry Number.

131525-59-2Relevant articles and documents

The synthesis and mesomorphism of di-, tetra- and hexa-catenar liquid crystals based on 2,2′-bipyridine

Rowe, Kathryn E.,Bruce, Duncan W.

, p. 331 - 341 (2007/10/03)

2,2′-Bipyridines are known to coordinate to a wide variety of metal centres. In this paper, liquid-crystalline two-chained (dicatenar), four-chained (tetracatenar) and six-chained (hexacatenar) bipyridines are synthesised and their mesomorphism is described. For the tetracatenar bipyridines, a full homologous series, from tetramethoxy to tetratetradecyloxy, was synthesised, and the phase diagram showed a classic progression from nematic and smectic C phases at short chain length, through a cubic phase to a columnar phase.

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