212121-02-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 212121-02-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,1,2 and 1 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 212121-02:
(8*2)+(7*1)+(6*2)+(5*1)+(4*2)+(3*1)+(2*0)+(1*2)=53
53 % 10 = 3
So 212121-02-3 is a valid CAS Registry Number.