12139-65-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 12139-65-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,1,3 and 9 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 12139-65:
(7*1)+(6*2)+(5*1)+(4*3)+(3*9)+(2*6)+(1*5)=80
80 % 10 = 0
So 12139-65-0 is a valid CAS Registry Number.