1017661-80-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1017661-80-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,7,6,6 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1017661-80:
(9*1)+(8*0)+(7*1)+(6*7)+(5*6)+(4*6)+(3*1)+(2*8)+(1*0)=131
131 % 10 = 1
So 1017661-80-1 is a valid CAS Registry Number.