139515-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139515-31-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,1 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139515-31:
(8*1)+(7*3)+(6*9)+(5*5)+(4*1)+(3*5)+(2*3)+(1*1)=134
134 % 10 = 4
So 139515-31-4 is a valid CAS Registry Number.