Oxonium, (hydroxymethyl)methylene- is a chemical compound registered under CAS number 137516-32-6, with the molecular formula C2H5O2 and a molecular weight of about 61.06 g/mol. FireTardant supplies Oxonium, (hydroxymethyl)methylene- for laboratory research and bulk production; product code 1576724. Send an inquiry for purity, packaging, price and lead time.