143931-42-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143931-42-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,3 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 143931-42:
(8*1)+(7*4)+(6*3)+(5*9)+(4*3)+(3*1)+(2*4)+(1*2)=124
124 % 10 = 4
So 143931-42-4 is a valid CAS Registry Number.