21502-12-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21502-12-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,0 and 2 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21502-12:
(7*2)+(6*1)+(5*5)+(4*0)+(3*2)+(2*1)+(1*2)=55
55 % 10 = 5
So 21502-12-5 is a valid CAS Registry Number.