521-68-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 521-68-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,2 and 1 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 521-68:
(5*5)+(4*2)+(3*1)+(2*6)+(1*8)=56
56 % 10 = 6
So 521-68-6 is a valid CAS Registry Number.