57120-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57120-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,1,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57120-21:
(7*5)+(6*7)+(5*1)+(4*2)+(3*0)+(2*2)+(1*1)=95
95 % 10 = 5
So 57120-21-5 is a valid CAS Registry Number.