tioxolone tioxolone tioxolone (inn, also spelled thioxolone) is an anti-acne preparation. tioxolone names preferred iupac name 6-hydroxy-2h-1,3-benzoxathiol-2-one identifiers cas number 4991-65-5 y 3d model (jsmol) interactive image beilstein reference 136261 chebi chebi:568021 chembl chembl442687 y chemspider 65113 y drugbank db13343 echa infocard 100.023.321 ec number 225-653-0 kegg d07211 y pubchem cid 72139 rtecs number dm2953750 unii s0faj1r9cd y comptox dashboard (epa) dtxsid5045885 inchi inchi=1s/c7h4o3s/c8-4-1-2-6-5(3-4)10-7(9)11-6/h1-3,8h nkey: slypovjcsqhitr-uhfffaoysa-n ninchi=1/c7h4o3s/c8-4-1-2-6-5(3-4)10-7(9)11-6/h1-3,8hkey: slypovjcsqhitr-uhfffaoyac smiles c1=cc2=c(c=c1o)oc(=o)s2 properties chemical formula c7h4o3s molar mass 168.16986 melting point 158 to 160 °c (316 to 320 °f; 431 to 433 k) pharmacology atc code d10ab03 (who) hazards ghs labelling: pictograms signal word warning hazard statements h302, h315, h319, h335 precautionary statements p261, p264, p270, p271, p280, p301+p312, p302+p352, p304+p340, p305+p351+p338, p312, p321, p330, p332+p313, p337+p313, p362, p403+p233, p405, p501 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references