1138445-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1138445-31-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,3,8,4,4 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1138445-31:
(9*1)+(8*1)+(7*3)+(6*8)+(5*4)+(4*4)+(3*5)+(2*3)+(1*1)=144
144 % 10 = 4
So 1138445-31-4 is a valid CAS Registry Number.