665009-98-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 665009-98-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,5,0,0 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 665009-98:
(8*6)+(7*6)+(6*5)+(5*0)+(4*0)+(3*9)+(2*9)+(1*8)=173
173 % 10 = 3
So 665009-98-3 is a valid CAS Registry Number.