640716-53-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 640716-53-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,7,1 and 6 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 640716-53:
(8*6)+(7*4)+(6*0)+(5*7)+(4*1)+(3*6)+(2*5)+(1*3)=146
146 % 10 = 6
So 640716-53-6 is a valid CAS Registry Number.