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128254-45-5

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128254-45-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128254-45-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,5 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128254-45:
(8*1)+(7*2)+(6*8)+(5*2)+(4*5)+(3*4)+(2*4)+(1*5)=125
125 % 10 = 5
So 128254-45-5 is a valid CAS Registry Number.

128254-45-5Relevant articles and documents

PREPARATION OF 2,4-BIS(METHYLSULFONYL)-1-NAPHTHYL ("BMSN") ACTIVE ESTERS AND THEIR POTENTIAL UTILITY IN PEPTIDE BOND FORMATION

Bereznak, James F.,Joullie, Madeleine M.

, p. 3573 - 3578 (2007/10/02)

A convenient synthesis of 2,4-bis(methylthio)-1-naphthol and 2,4-bis(methylsulfonyl)-1-naphthol is reported.The utility of the latter as a carboxyl-activating component in the formation of peptide bonds is also presented.

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