81580-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81580-18-9 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 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81580-18:
(7*8)+(6*1)+(5*5)+(4*8)+(3*0)+(2*1)+(1*8)=129
129 % 10 = 9
So 81580-18-9 is a valid CAS Registry Number.