662158-87-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 662158-87-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,2,1,5 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 662158-87:
(8*6)+(7*6)+(6*2)+(5*1)+(4*5)+(3*8)+(2*8)+(1*7)=174
174 % 10 = 4
So 662158-87-4 is a valid CAS Registry Number.