31289-17-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31289-17-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,8 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 31289-17:
(7*3)+(6*1)+(5*2)+(4*8)+(3*9)+(2*1)+(1*7)=105
105 % 10 = 5
So 31289-17-5 is a valid CAS Registry Number.