667404-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667404-57-1 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, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 667404-57:
(8*6)+(7*6)+(6*7)+(5*4)+(4*0)+(3*4)+(2*5)+(1*7)=181
181 % 10 = 1
So 667404-57-1 is a valid CAS Registry Number.