139689-87-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139689-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,8 and 9 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139689-87:
(8*1)+(7*3)+(6*9)+(5*6)+(4*8)+(3*9)+(2*8)+(1*7)=195
195 % 10 = 5
So 139689-87-5 is a valid CAS Registry Number.