641603-03-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641603-03-4 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 3 respectively.
Calculate Digit Verification of CAS Registry Number 641603-03:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*3)+(2*0)+(1*3)=124
124 % 10 = 4
So 641603-03-4 is a valid CAS Registry Number.