25221-61-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25221-61-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,2,2 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25221-61:
(7*2)+(6*5)+(5*2)+(4*2)+(3*1)+(2*6)+(1*1)=78
78 % 10 = 8
So 25221-61-8 is a valid CAS Registry Number.