66803-17-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66803-17-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,8,0 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 66803-17:
(7*6)+(6*6)+(5*8)+(4*0)+(3*3)+(2*1)+(1*7)=136
136 % 10 = 6
So 66803-17-6 is a valid CAS Registry Number.