103989-05-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103989-05-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,8 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 103989-05:
(8*1)+(7*0)+(6*3)+(5*9)+(4*8)+(3*9)+(2*0)+(1*5)=135
135 % 10 = 5
So 103989-05-5 is a valid CAS Registry Number.