1213690-66-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1213690-66-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,3,6,9 and 0 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1213690-66:
(9*1)+(8*2)+(7*1)+(6*3)+(5*6)+(4*9)+(3*0)+(2*6)+(1*6)=134
134 % 10 = 4
So 1213690-66-4 is a valid CAS Registry Number.