Thick, black liquid used topically as an anti-infective to treat certain skin diseases.
Ammonium ichthosulphonate an almost black, thick liquid of fishy smell, prepared from a bituminous shale. It is used in some people with chronic eczema.
This medication is employed in skin preparations to treat eczema and alleviate itching.
A dense, dark substance sourced from coal, often used in ointments to treat eczema and alleviate itching. It’s also known as ichthyol.