666209-41-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666209-41-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,2,0 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 666209-41:
(8*6)+(7*6)+(6*6)+(5*2)+(4*0)+(3*9)+(2*4)+(1*1)=172
172 % 10 = 2
So 666209-41-2 is a valid CAS Registry Number.