688331-87-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 688331-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,8,3,3 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 688331-87:
(8*6)+(7*8)+(6*8)+(5*3)+(4*3)+(3*1)+(2*8)+(1*7)=205
205 % 10 = 5
So 688331-87-5 is a valid CAS Registry Number.