663209-81-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663209-81-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,2,0 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 663209-81:
(8*6)+(7*6)+(6*3)+(5*2)+(4*0)+(3*9)+(2*8)+(1*1)=162
162 % 10 = 2
So 663209-81-2 is a valid CAS Registry Number.