Is selling face masks with a small profit margin, and selling bottled alcohol of unknown origin—after verifying its validity—permissible or forbidden?

Selling face masks is permissible if it is free from deception or fraud. Selling medical alcohol for sterilization is a matter of scholarly disagreement, and the preponderant opinion according to us is its permissibility. However, if the state prohibits the sale of goods of unknown origin for the public good, then it is obligatory not to violate these laws.