57221-88-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57221-88-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,2,2 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 57221-88:
(7*5)+(6*7)+(5*2)+(4*2)+(3*1)+(2*8)+(1*8)=122
122 % 10 = 2
So 57221-88-2 is a valid CAS Registry Number.