31172-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31172-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,1,7 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31172-81:
(7*3)+(6*1)+(5*1)+(4*7)+(3*2)+(2*8)+(1*1)=83
83 % 10 = 3
So 31172-81-3 is a valid CAS Registry Number.