204765-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204765-71-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,7,6 and 5 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 204765-71:
(8*2)+(7*0)+(6*4)+(5*7)+(4*6)+(3*5)+(2*7)+(1*1)=129
129 % 10 = 9
So 204765-71-9 is a valid CAS Registry Number.