71988-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71988-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,8 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 71988-81:
(7*7)+(6*1)+(5*9)+(4*8)+(3*8)+(2*8)+(1*1)=173
173 % 10 = 3
So 71988-81-3 is a valid CAS Registry Number.