121639-13-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121639-13-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,6,3 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121639-13:
(8*1)+(7*2)+(6*1)+(5*6)+(4*3)+(3*9)+(2*1)+(1*3)=102
102 % 10 = 2
So 121639-13-2 is a valid CAS Registry Number.