641603-04-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641603-04-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,1,6,0 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 641603-04:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*3)+(2*0)+(1*4)=125
125 % 10 = 5
So 641603-04-5 is a valid CAS Registry Number.