1222-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1222-21-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,2 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1222-21:
(6*1)+(5*2)+(4*2)+(3*2)+(2*2)+(1*1)=35
35 % 10 = 5
So 1222-21-5 is a valid CAS Registry Number.