81582-25-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81582-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,8 and 2 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81582-25:
(7*8)+(6*1)+(5*5)+(4*8)+(3*2)+(2*2)+(1*5)=134
134 % 10 = 4
So 81582-25-4 is a valid CAS Registry Number.