phenylmercuric nitrate phenylmercuric nitrate phenylmercuric nitrate is an organomercury compound with powerful antiseptic and antifungal effects. it was once commonly used as a topical solution for disinfecting wounds, but as with all organomercury compounds it is highly toxic, especially to the kidneys, and is no longer used in this application. however it is still used in low concentrations as a preservative in eye drops for ophthalmic use, making it one of the few organomercury derivatives remaining in current medical use. phenylmercuric nitrate names iupac name nitrooxy(phenyl)mercury identifiers cas number 55-68-5 y 3d model (jsmol) interactive image chebi chebi:136021 chemspider 13854801 y echa infocard 100.000.221 ec number 200-242-9 pubchem cid 16682924 rtecs number ow8400000 unii cg8692zn14 y un number 1895 comptox dashboard (epa) dtxsid6044569 inchi inchi=1s/c6h5.hg.no3/c1-2-4-6-5-3-1;;2-1(3)4/h1-5h;;/q;+1;-1key: pdtfchsetjbptr-uhfffaoysa-n smiles c1=cc=c(c=c1)o(=o) properties chemical formula c6h5hgno3 molar mass 339.702 g/mol melting point 176–186 °c (349–367 °f; 449–459 k) hazards occupational safety and health (ohs/osh): main hazards toxic ghs labelling: pictograms signal word danger hazard statements h301, h314, h372, h410 precautionary statements p260, p264, p270, p273, p280, p301+p310, p301+p330+p331, p303+p361+p353, p304+p340, p305+p351+p338, p310, p314, p321, p330, p363, p391, p405, p501 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references