66400-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66400-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,4,0 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 66400-19:
(7*6)+(6*6)+(5*4)+(4*0)+(3*0)+(2*1)+(1*9)=109
109 % 10 = 9
So 66400-19-9 is a valid CAS Registry Number.