666209-57-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666209-57-0 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, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 666209-57:
(8*6)+(7*6)+(6*6)+(5*2)+(4*0)+(3*9)+(2*5)+(1*7)=180
180 % 10 = 0
So 666209-57-0 is a valid CAS Registry Number.