80391-99-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 80391-99-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,3,9 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 80391-99:
(7*8)+(6*0)+(5*3)+(4*9)+(3*1)+(2*9)+(1*9)=137
137 % 10 = 7
So 80391-99-7 is a valid CAS Registry Number.