6O

6O or 6-O can refer to:


 * 6O, IATA code for Air Satellite
 * 6-O-Methylguanine
 * 6-O-methylnorlaudanosoline 5'-O-methyltransferase
 * 6-O-arabinopyranosylglucopyranoside; see Vicianin
 * 6-O-Methylesculetin; see Scopoletin
 * 6-O-palmitoylascorbic acid; see Ascorbyl palmitate
 * 6-O-(alpha-L-rhamnopyranosyl)-D-glucopyranose; see Rutinose
 * 6-O-Alpha-D-Glucopyranosyl-D-Fructofuranose; see Isomaltulose
 * 6-O-sulfation, a phenomenon occurring in Heparan sulfate