The present invention relates to a composition in solution (often in aqueous solution), comprising a combination of molecular iodine (I) and an acceptable source of iodate (IO), as well as an acid (inorganic or organic) in which the iodide and iodate are present in the composition in a molar ratio of approximately 0.1 to 25, while the concentration of unbound molecular iodine is an effective amount of a disinfectant, biocidal and (or) antimicrobial agent (depending on the end use of the composition), while the concentration tion acid in the composition is effective for buffering the pH value in the composition being in the range of about 1.5 to 6.5. Compositions in accordance with the present invention are stable during storage for an exceptionally long period of time (up to about 5 years) and are used as disinfectant solutions in the form of bactericides and / or biocides (for example, antiviral, antibacterial, antifungal, antisporic, etc. e.) for various surfaces and solutions for disinfecting surfaces of animate and inanimate objects, while compositions are extremely acceptable due to their low cost , low iodine content in them, their activity (due to the high concentration of free molecular iodine in solution), their low level of negative environmental impact, their persistence during long-term storage and their low toxicity. Compositions are also extremely effective for treating food surfaces to slow down their deterioration process, increase shelf life during storage and minimize the socio-economic costs associated with food waste. Compositions provide inactivation of viruses, bacteria (both gram-negative and gram-positive), spores and fungi. Compositions in accordance with the present invention can be applied and stored in the form of various embodiments of the present invention due to the fact that these compositions show practically no corrosive properties (are non-corrosive). Also in this application are disclosed dental compositions (for example, pre-trea
