667404-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667404-71-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,4,0 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 667404-71:
(8*6)+(7*6)+(6*7)+(5*4)+(4*0)+(3*4)+(2*7)+(1*1)=179
179 % 10 = 9
So 667404-71-9 is a valid CAS Registry Number.