99977-77-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99977-77-2 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 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99977-77:
(7*9)+(6*9)+(5*9)+(4*7)+(3*7)+(2*7)+(1*7)=232
232 % 10 = 2
So 99977-77-2 is a valid CAS Registry Number.