19204-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19204-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,2,0 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19204-80:
(7*1)+(6*9)+(5*2)+(4*0)+(3*4)+(2*8)+(1*0)=99
99 % 10 = 9
So 19204-80-9 is a valid CAS Registry Number.