31040-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31040-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,0,4 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 31040-90:
(7*3)+(6*1)+(5*0)+(4*4)+(3*0)+(2*9)+(1*0)=61
61 % 10 = 1
So 31040-90-1 is a valid CAS Registry Number.