The database of recommended rate constants of chemical reactions in an H₂-O₂ gas mixture with electronically excited species O₂(1∆), O(1D), OH(2Σ) involved is presented. Τhe chemical model includes dissociation, recombination, exchange and quenching reactions. The rate constants proposed are recommended for using for the temperature range Т = 500−2500 К in combustion problems. Both original experimental studies and well known reviews are used.