66909-74-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66909-74-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,9,0 and 9 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 66909-74:
(7*6)+(6*6)+(5*9)+(4*0)+(3*9)+(2*7)+(1*4)=168
168 % 10 = 8
So 66909-74-8 is a valid CAS Registry Number.