28719-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28719-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,7,1 and 9 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 28719-19:
(7*2)+(6*8)+(5*7)+(4*1)+(3*9)+(2*1)+(1*9)=139
139 % 10 = 9
So 28719-19-9 is a valid CAS Registry Number.