204686-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204686-77-1 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, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 204686-77:
(8*2)+(7*0)+(6*4)+(5*6)+(4*8)+(3*6)+(2*7)+(1*7)=141
141 % 10 = 1
So 204686-77-1 is a valid CAS Registry Number.