18457-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18457-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,4,5 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 18457-87:
(7*1)+(6*8)+(5*4)+(4*5)+(3*7)+(2*8)+(1*7)=139
139 % 10 = 9
So 18457-87-9 is a valid CAS Registry Number.