816-28-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 816-28-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,1 and 6 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 816-28:
(5*8)+(4*1)+(3*6)+(2*2)+(1*8)=74
74 % 10 = 4
So 816-28-4 is a valid CAS Registry Number.