656801-18-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 656801-18-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,6,8,0 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 656801-18:
(8*6)+(7*5)+(6*6)+(5*8)+(4*0)+(3*1)+(2*1)+(1*8)=172
172 % 10 = 2
So 656801-18-2 is a valid CAS Registry Number.