667431-76-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667431-76-7 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, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 667431-76:
(8*6)+(7*6)+(6*7)+(5*4)+(4*3)+(3*1)+(2*7)+(1*6)=187
187 % 10 = 7
So 667431-76-7 is a valid CAS Registry Number.