667431-05-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667431-05-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,4,3 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 667431-05:
(8*6)+(7*6)+(6*7)+(5*4)+(4*3)+(3*1)+(2*0)+(1*5)=172
172 % 10 = 2
So 667431-05-2 is a valid CAS Registry Number.