Zurex Pharma, a Middleton company with a new type of antiseptic for surgical wounds, is getting a boost from investors as it prepares to file for approval of its first product from federal regulators.

Zurex has added $9 million to its coffers, raising the total received so far to $28 million.

Zurex president and CEO Carmine Durham said ZurexPrep is a new type of antimicrobial solution designed to prevent infections from forming after surgery. Durham said isopropyl alcohol does “a pretty good job by itself” in killing bacteria, but it dries quickly.

“Our proprietary formula actually supports the effect of the alcohol better,” he said. “We have a unique formula using small amounts of paraben and citrate.” Read the full story here.