204331-73-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204331-73-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,3,3 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204331-73:
(8*2)+(7*0)+(6*4)+(5*3)+(4*3)+(3*1)+(2*7)+(1*3)=87
87 % 10 = 7
So 204331-73-7 is a valid CAS Registry Number.