666853-72-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666853-72-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,8,5 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 666853-72:
(8*6)+(7*6)+(6*6)+(5*8)+(4*5)+(3*3)+(2*7)+(1*2)=211
211 % 10 = 1
So 666853-72-1 is a valid CAS Registry Number.