31898-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31898-90-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,8,9 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 31898-90:
(7*3)+(6*1)+(5*8)+(4*9)+(3*8)+(2*9)+(1*0)=145
145 % 10 = 5
So 31898-90-5 is a valid CAS Registry Number.