4-Dimethylaminophenol (abbreviated in medical practice as DMAP) is an aromatic compound containing both phenol and amine functional groups. It has the molecular formula C8H11NO.
4-Dimethylaminophenol has been used as an antidote for cyanide poisoning. It has also been shown to be effective in treating hydrogen sulfide toxicity.
It works by generating methemoglobin. 
This is suitable as an emergency treatment only; treatment must be followed up with sodium thiosulfate or cobalamin.
In an animal model, it has shown effectiveness when given intramuscularly.
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- ^ Lindenmann J, Matzi V, Neuboeck N, Ratzenhofer-Komenda B, Maier A, Smolle-Juettner FM (December 2010). "Severe hydrogen sulphide poisoning treated with 4-dimethylaminophenol and hyperbaric oxygen". Diving and Hyperbaric Medicine : the Journal of the South Pacific Underwater Medicine Society 40 (4): 213–7. PMID 23111938. Retrieved 2013-06-07.
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