| 21. | The alpha proton is hydrolyzed with water and oxalic acid to the aldehyde.
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| 22. | It can be prepared by treating oxalic acid with phosphorus pentachloride.
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| 23. | With the addition of oxalic acid, the yttrium oxalate precipitates.
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| 24. | In dentistry, bleaching teeth has been done as early as 1877 using oxalic acid.
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| 25. | Some species, such as spinach and amaranth, contain oxalic acid.
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| 26. | "' Oxalyl fluoride "'is a fluorinated derivative of oxalic acid.
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| 27. | Cadmium catalyzes the transformation of vitamin C into oxalic acid.
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| 28. | :Oxalic acid will remove rust stains ( from iron ).
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| 29. | Wear skin and eye protection when working with oxalic acid.
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| 30. | When using oxalic acid, which is poisonous, read the label and observe all cautions.
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