71172-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71172-31-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,1,7 and 2 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 71172-31:
(7*7)+(6*1)+(5*1)+(4*7)+(3*2)+(2*3)+(1*1)=101
101 % 10 = 1
So 71172-31-1 is a valid CAS Registry Number.