161939-66-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161939-66-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,9,3 and 9 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 161939-66:
(8*1)+(7*6)+(6*1)+(5*9)+(4*3)+(3*9)+(2*6)+(1*6)=158
158 % 10 = 8
So 161939-66-8 is a valid CAS Registry Number.