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404-32-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 404-32-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,0 and 4 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 404-32:
(5*4)+(4*0)+(3*4)+(2*3)+(1*2)=40
40 % 10 = 0
So 404-32-0 is a valid CAS Registry Number.

404-32-0Relevant articles and documents

α-Chymotrypsin-catalysed peptide synthesis using activated esters as acyl donors

Miyazawa, Toshifumi,Nakajo, Shin'ichi,Nishikawa, Miyako,Imagawa, Kiwamu,Yanagihara, Ryoji,Yamada, Takashi

, p. 2867 - 2868 (2007/10/03)

The coupling efficiency in α-chymotrypsin-catalysed peptide synthesis is greatly improved by the use of activated esters such as the 2,2,2-trifluoroethyl ester as acyl donor instead of the conventional methyl ester; this approach is useful for the incorporation of non-protein amino acids into peptides.

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