109408-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109408-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,0 and 8 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 109408-77:
(8*1)+(7*0)+(6*9)+(5*4)+(4*0)+(3*8)+(2*7)+(1*7)=127
127 % 10 = 7
So 109408-77-7 is a valid CAS Registry Number.