31554-23-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31554-23-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,5,5 and 4 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 31554-23:
(7*3)+(6*1)+(5*5)+(4*5)+(3*4)+(2*2)+(1*3)=91
91 % 10 = 1
So 31554-23-1 is a valid CAS Registry Number.