7128-87-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7128-87-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,2 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 7128-87:
(6*7)+(5*1)+(4*2)+(3*8)+(2*8)+(1*7)=102
102 % 10 = 2
So 7128-87-2 is a valid CAS Registry Number.