657401-76-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 657401-76-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,7,4,0 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 657401-76:
(8*6)+(7*5)+(6*7)+(5*4)+(4*0)+(3*1)+(2*7)+(1*6)=168
168 % 10 = 8
So 657401-76-8 is a valid CAS Registry Number.