656817-41-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 656817-41-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,6,8,1 and 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 656817-41:
(8*6)+(7*5)+(6*6)+(5*8)+(4*1)+(3*7)+(2*4)+(1*1)=193
193 % 10 = 3
So 656817-41-3 is a valid CAS Registry Number.