13689-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13689-05-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,6,8 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 13689-05:
(7*1)+(6*3)+(5*6)+(4*8)+(3*9)+(2*0)+(1*5)=119
119 % 10 = 9
So 13689-05-9 is a valid CAS Registry Number.