Aceto Corp. has begun selling a generic drug to treat ear infections.

The Port Washington-based manufacturer of drugs and chemicals recently launched Fluocinolone Acetonide OTIC Oil 0.01%, a generic version of DermOtic from drugmaker Hill Dermaceuticals Inc. The oils are used for chronic eczematous external otitis, an inflammation of the ear canal caused by a bacterial infection.

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The product will be handled by the company’s Rising Pharmaceuticals Inc. subsidiary in New Jersey, officials said earlier this month.

U.S. sales of existing versions of the drug were $30 million in the 12 months ended July 31, according to the health care research firm IMS Health.