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217655-15-7

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217655-15-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 217655-15-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,6,5 and 5 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 217655-15:
(8*2)+(7*1)+(6*7)+(5*6)+(4*5)+(3*5)+(2*1)+(1*5)=137
137 % 10 = 7
So 217655-15-7 is a valid CAS Registry Number.

217655-15-7Relevant articles and documents

Bathochromic or hypsochromic effects via the extension of conjugation: A study of stilbenoid squaraines

Meier, Herbert,Petermann, Ralf,Gerold, Juergen

, p. 977 - 978 (1999)

In contrast to normal conjugated oligomers, the stilbenoid squaraines 3a-d do not show a convergence of VIS/NIR absorption due to the extension of conjugation; the observed bathochromic effect in the beginning of the series is followed by a hypsochromic e

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