204515-53-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204515-53-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,5,1 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204515-53:
(8*2)+(7*0)+(6*4)+(5*5)+(4*1)+(3*5)+(2*5)+(1*3)=97
97 % 10 = 7
So 204515-53-7 is a valid CAS Registry Number.