644-73-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 644-73-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,4 and 4 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 644-73:
(5*6)+(4*4)+(3*4)+(2*7)+(1*3)=75
75 % 10 = 5
So 644-73-5 is a valid CAS Registry Number.