19654-69-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19654-69-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,5 and 4 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 19654-69:
(7*1)+(6*9)+(5*6)+(4*5)+(3*4)+(2*6)+(1*9)=144
144 % 10 = 4
So 19654-69-4 is a valid CAS Registry Number.