12% - 1 Bottle 12 oz of H2O2 with 1 oz Glass Bottle Dropper empty for your convenience. H2o2 Hydrogen Peroxide Food Grade Certified #7722-84-1. 12% h2o2 Food Grade Certified is fresh. The dropper needs to be kept a little loose to allow it to vent and to avoid pressure built up in the bottle. OUR POLICY IS 100% CUSTOMER SATISFACTION OR MONEY BACK GUARANTEE.