hypochlorous acid
hypochlorous acid
CAS: 7790-92-3
Molecular Formula: ClHO
hypochlorous acid - Names and Identifiers
| Name | hypochlorous acid |
| Synonyms | HClO UNII-712K4CDC10 hypochlorousaci Hypochlorous acid hypochlorous acid High test hypochlorite TIANFU-CHEM hypochlorous acid Hypochlorous acid Standard Solution |
| CAS | 7790-92-3 |
| EINECS | 232-232-5 |
| InChI | InChI=1S/ClHO/c1-2/h2H |
hypochlorous acid - Physico-chemical Properties
| Molecular Formula | ClHO |
| Molar Mass | 52.46 |
| Density | 1.1655 g/cm3 |
| Boling Point | 125-130 °C(Press: 11 Torr) |
| Appearance | stable only in solution |
| pKa | pK (25°) 7.49 |
| Physical and Chemical Properties | State at room temperature: only in aqueous solution. The aqueous solution can be concentrated in vacuo to a density of 1.282, I .e., a concentration of 40.1%. When heated to 40 ℃, it decomposes and explodes. Color: colorless to light yellow green (color change is because the reaction Cl2 + H2O = HCIO + HCl is a reversible reaction, in different states of the equilibrium state is also different, yellow green is because of the dissolved chlorine gas) |
hypochlorous acid - Risk and Safety
| UN IDs | 3139 |
| Hazard Class | 5.1 |
| Packing Group | II |
hypochlorous acid - Reference Information
Open Data Unverified Data
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | hypochlorous acid has a small molecular weight, easily spreads to the surface of bacteria and penetrates the cell membrane into the cell, oxidation of bacterial proteins leads to bacterial death. Is a new type of Disinfection dose, in some hospitals in Japan will have a set of hypochlorous acid water Disinfection system, for various Disinfection. Currently used in China is not much. |
| range of action | sodium hypochlorite is prohibited to be directly used in air Disinfection, suitable for hard object surface, hospital pollutant body, white fabric and medical devices Disinfection. Also for textile bleaching function, but when using, pay attention to harmonic ratio and personal protection. |
| sterilization mechanism | sodium hypochlorite is hydrolyzed to form hypochlorous acid, which is further decomposed to form new ecological oxygen [O], the strong oxidation of the new ecological oxygen makes the bacteria and Virus of the protein and other substances denatured, thus killing pathogenic microorganisms. |
| Use | hypochlorous acid is commonly used as a bleaching agent, oxidant and disinfectant. Due to its strong oxidation and bleaching action, its salts can be used as bleaching agents and disinfectants. The most important of hypochlorite is calcium salt, which is the active ingredient of bleaching powder (a mixture of calcium hypochlorite and basic calcium chloride). In biological systems, hypochlorous acid can be considered the most toxic and abundant oxidant produced by leukocytes such as neutrophils and monocytes. Hypochlorous acid acts as an extremely strong oxidant and rapidly affects more than Aggression physiologically relevant molecules, including thiols, thioethers, amines, amino acids, nucleotides, ascorbic acid, and polyenoic acid. At the same time, hypochlorous acid can generate other oxidants with very high reactivity, for example, reaction with H2O2 and superoxide anions can generate singlet oxygen and hydroxyl radicals, respectively. Hypochlorous acid as a Disinfection agent, is widely used in the surface of objects, fabrics and other contaminated items, as well as water, fruits and vegetables and eating and drinking Disinfection. In addition to the above uses, hypochlorous acid can also be used in indoor air, secondary water supply facilities surface, hands, skin and mucous membranes of Disinfection. |
| preparation method | laboratory preparation method: calcium hypochlorite reacts with carbon dioxide or oxalic acid and then filters to obtain high-purity filtrate. The reaction equation is: Ca(ClO)2 H2O CO2 → CaCO3 ↓ 2HClO. Industrial Process: by chlorine, carbon tetrachloride, water and mercury oxide after shaking and distillation. Other methods: chlorine and water, the formation of hypochlorous acid and hydrochloric acid, calcium carbonate to increase the concentration. The reaction equation is: 2H2O 2Cl2 CaCO3 → CaCl2 H2O CO2 2HClO. |
| production method | process ① is derived from the introduction of free chlorine into water. (2) chlorine gas is introduced into the potassium hydroxide aqueous solution, and sulfuric acid is added and distilled. (3) obtained by bleaching powder in CO2 gas distillation. |
Last Update：2024-04-09 19:43:38
