71581-24-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71581-24-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,5,8 and 1 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 71581-24:
(7*7)+(6*1)+(5*5)+(4*8)+(3*1)+(2*2)+(1*4)=123
123 % 10 = 3
So 71581-24-3 is a valid CAS Registry Number.