30021-05-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 30021-05-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,0,0,2 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 30021-05:
(7*3)+(6*0)+(5*0)+(4*2)+(3*1)+(2*0)+(1*5)=37
37 % 10 = 7
So 30021-05-7 is a valid CAS Registry Number.