5618-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5618-21-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5618-21:
(6*5)+(5*6)+(4*1)+(3*8)+(2*2)+(1*1)=93
93 % 10 = 3
So 5618-21-3 is a valid CAS Registry Number.