The CAS Registry Mumber 71915-20-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,1 and 5 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 71915-20: (7*7)+(6*1)+(5*9)+(4*1)+(3*5)+(2*2)+(1*0)=123 123 % 10 = 3 So 71915-20-3 is a valid CAS Registry Number.
Andronati, S. A.,Litvinova, Lyudmila A.,Lyakhov, S. A.,Shapiro, Yu. E.,Kravtsov, O. A.,Gorbatyuk, V. Ya.
, p. 640 - 641 (2007/10/02)
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