99973-78-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99973-78-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,7 and 3 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99973-78:
(7*9)+(6*9)+(5*9)+(4*7)+(3*3)+(2*7)+(1*8)=221
221 % 10 = 1
So 99973-78-1 is a valid CAS Registry Number.