77953-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77953-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,5 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77953-20:
(7*7)+(6*7)+(5*9)+(4*5)+(3*3)+(2*2)+(1*0)=169
169 % 10 = 9
So 77953-20-9 is a valid CAS Registry Number.
77953-20-9Relevant academic research and scientific papers
SYNTHESIS OF SUBSTITUTED 2- AND 4-CARBOXYPYRYLIUM SALTS
Kholodova, N. V.,Andreichikov, Yu. P.,Dorofeenko, G. N.
, p. 109 - 112 (2007/10/02)
Modified methods for the synthesis of substituted 2- and 4-carboxypyrylium perchlorates and the necessary diphenacylacetic acids are proposed.
