6817-87-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6817-87-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,1 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6817-87:
(6*6)+(5*8)+(4*1)+(3*7)+(2*8)+(1*7)=124
124 % 10 = 4
So 6817-87-4 is a valid CAS Registry Number.