161557-59-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161557-59-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,5,5 and 7 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 161557-59:
(8*1)+(7*6)+(6*1)+(5*5)+(4*5)+(3*7)+(2*5)+(1*9)=141
141 % 10 = 1
So 161557-59-1 is a valid CAS Registry Number.