31591-56-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31591-56-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,5,9 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 31591-56:
(7*3)+(6*1)+(5*5)+(4*9)+(3*1)+(2*5)+(1*6)=107
107 % 10 = 7
So 31591-56-7 is a valid CAS Registry Number.