6620-19-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6620-19-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,2 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6620-19:
(6*6)+(5*6)+(4*2)+(3*0)+(2*1)+(1*9)=85
85 % 10 = 5
So 6620-19-5 is a valid CAS Registry Number.