171557-61-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 171557-61-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,5,5 and 7 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 171557-61:
(8*1)+(7*7)+(6*1)+(5*5)+(4*5)+(3*7)+(2*6)+(1*1)=142
142 % 10 = 2
So 171557-61-2 is a valid CAS Registry Number.