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87128-04-9

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87128-04-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87128-04-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,1,2 and 8 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 87128-04:
(7*8)+(6*7)+(5*1)+(4*2)+(3*8)+(2*0)+(1*4)=139
139 % 10 = 9
So 87128-04-9 is a valid CAS Registry Number.

87128-04-9Relevant articles and documents

Synthesis of 2-Aryl-3-arylsulphonyl-6-methylchromones as PCA Inhibitors

Jadhav, K. P.,Ingle, D. B.

, p. 150 - 153 (2007/10/02)

Condensation of arylmercaptans with 2-chloro-2'-hydroxy-5'-methylacetophenones yields 2-aryl-2'-hydroxy-5'-methylthioacetophenones (I) which on oxidation with excess of hydrogen peroxide (30percent) and gl. acetic acid give the β-ketosulphones (II).The la

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