666820-80-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666820-80-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,8,2 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 666820-80:
(8*6)+(7*6)+(6*6)+(5*8)+(4*2)+(3*0)+(2*8)+(1*0)=190
190 % 10 = 0
So 666820-80-0 is a valid CAS Registry Number.