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US 2011/0256244 A1Published application
Composition for stabilizing chlorine dioxide
AssigneeTaiko Pharmaceutical Co., Ltd.
InventorKoji ABE
Life of this patent
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Abstract
A composition for stabilizing chlorine dioxide maintains a chlorine dioxide concentration nearly constant in the agent containing chlorine dioxide dissolved therein even when chlorine dioxide is continuously released as gas from agent, and includes a chlorite and a pH adjuster. The pH adjuster is an acid or a salt thereof having a buffering property whose pH is 2.5 to 6.8 as a 5% aqueous solution at 25° C.
Claims4
A method of producing a composition for stabilizing chlorine dioxide, the method comprising:
- dissolving a chlorite in water to prepare 2,000 to 180,000 ppm of an aqueous chlorite solution;
- and
- dissolving sodium dihydrogenphosphate in the aqueous chlorite solution in 0.5g/L to 100 g/L to adjust the pH to 4.5 to 6.5.
A method of producing a chlorine dioxide solution, comprising:
- dissolving a chlorite in water to prepare 2,000 to 180,000 ppm of an aqueous clorite solution;
- dissolving chlorine dioxide gas in water to prepare 100 to 2,900 ppm of an aqueous solution of chlorine dioxide;
- and
- mixing the aqueous chlorite solution, the aqueous solution of chlorine dioxide and a composition for stabilizing chlorine dioxide to adjust the pH to 4.5 to 6.5,
- wherein the composition for stabilizing chlorine dioxide comprises:
- a chlorite and
- a pH adjuster which is an acid or a salt thereof having a buffering property whose pH is 2.5 to 6.8 as a 5% aqueous solution at 25° C.
4 more elements
Dependencies are inferred from the claim text.