161689-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161689-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,6,8 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 161689-57:
(8*1)+(7*6)+(6*1)+(5*6)+(4*8)+(3*9)+(2*5)+(1*7)=162
162 % 10 = 2
So 161689-57-2 is a valid CAS Registry Number.