40003-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40003-31-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,0,0 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 40003-31:
(7*4)+(6*0)+(5*0)+(4*0)+(3*3)+(2*3)+(1*1)=44
44 % 10 = 4
So 40003-31-4 is a valid CAS Registry Number.