31944-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31944-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,9,4 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 31944-57:
(7*3)+(6*1)+(5*9)+(4*4)+(3*4)+(2*5)+(1*7)=117
117 % 10 = 7
So 31944-57-7 is a valid CAS Registry Number.