103931-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103931-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 103931-40:
(8*1)+(7*0)+(6*3)+(5*9)+(4*3)+(3*1)+(2*4)+(1*0)=94
94 % 10 = 4
So 103931-40-4 is a valid CAS Registry Number.