31108-61-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31108-61-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,1,0 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31108-61:
(7*3)+(6*1)+(5*1)+(4*0)+(3*8)+(2*6)+(1*1)=69
69 % 10 = 9
So 31108-61-9 is a valid CAS Registry Number.