1016680-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1016680-91-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,6,6,8 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1016680-91:
(9*1)+(8*0)+(7*1)+(6*6)+(5*6)+(4*8)+(3*0)+(2*9)+(1*1)=133
133 % 10 = 3
So 1016680-91-3 is a valid CAS Registry Number.