99877-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99877-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,7 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99877-71:
(7*9)+(6*9)+(5*8)+(4*7)+(3*7)+(2*7)+(1*1)=221
221 % 10 = 1
So 99877-71-1 is a valid CAS Registry Number.