204840-15-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204840-15-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,8,4 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 204840-15:
(8*2)+(7*0)+(6*4)+(5*8)+(4*4)+(3*0)+(2*1)+(1*5)=103
103 % 10 = 3
So 204840-15-3 is a valid CAS Registry Number.