| 摘要 |
Provided is an aqueous solution in which hydrogen dissolved therein has a long life duration at low cost. Specifically disclosed is an aqueous solution having hydrogen dissolved therein at a concentration of not less than 0.01 ppm and not higher than the saturated concentration, wherein the aqueous solution contains a substance having a reducing aldehyde group and/or a glycoside hydroxyl group in an amount of 10 to 300000 ppm.
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