663905-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663905-19-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,9,0 and 5 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 663905-19:
(8*6)+(7*6)+(6*3)+(5*9)+(4*0)+(3*5)+(2*1)+(1*9)=179
179 % 10 = 9
So 663905-19-9 is a valid CAS Registry Number.