31893-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31893-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,8,9 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31893-81:
(7*3)+(6*1)+(5*8)+(4*9)+(3*3)+(2*8)+(1*1)=129
129 % 10 = 9
So 31893-81-9 is a valid CAS Registry Number.