667877-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667877-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,8,7 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 667877-40:
(8*6)+(7*6)+(6*7)+(5*8)+(4*7)+(3*7)+(2*4)+(1*0)=229
229 % 10 = 9
So 667877-40-9 is a valid CAS Registry Number.