641603-16-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641603-16-9 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, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 641603-16:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*3)+(2*1)+(1*6)=129
129 % 10 = 9
So 641603-16-9 is a valid CAS Registry Number.