999999-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 999999-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,9,9,9,9 and 9 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 999999-99:
(8*9)+(7*9)+(6*9)+(5*9)+(4*9)+(3*9)+(2*9)+(1*9)=324
324 % 10 = 4
So 999999-99-4 is a valid CAS Registry Number.