66181-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66181-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,1,8 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 66181-19:
(7*6)+(6*6)+(5*1)+(4*8)+(3*1)+(2*1)+(1*9)=129
129 % 10 = 9
So 66181-19-9 is a valid CAS Registry Number.