204686-66-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204686-66-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,6,8 and 6 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 204686-66:
(8*2)+(7*0)+(6*4)+(5*6)+(4*8)+(3*6)+(2*6)+(1*6)=138
138 % 10 = 8
So 204686-66-8 is a valid CAS Registry Number.