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20815-41-2

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20815-41-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20815-41-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,1 and 5 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20815-41:
(7*2)+(6*0)+(5*8)+(4*1)+(3*5)+(2*4)+(1*1)=82
82 % 10 = 2
So 20815-41-2 is a valid CAS Registry Number.

20815-41-2Relevant articles and documents

Tetramethylguanidino-substituted pyrylium and thio pyrylium salts

Galezowski, Wlodzimierz,Leffek, Kenneth T.,Pruszynski, Przemyslaw

, p. 2390 - 2393 (2007/10/02)

Four new tetramethylguanidino-substituted pyrylium and thiopyrylium salt dyes have been prepared and their absorption maxima in the visible region measured.The positions of the absorption maxima are similar to those observed for thiopyrylium salt dyes use

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