1.Corrosion of metals
Oxalic acid can react with various metals (such as iron, aluminum, etc.) to form soluble oxalates, causing corrosion of the metal surface.
2. Irritation and corrosiveness to the skin
Direct contact with solid oxalic acid or high-concentration solutions may cause skin burns, redness, swelling or ulcers.
Long-term exposure to low concentrations of oxalic acid may also cause dry and cracked skin.
3. Hazards to the eyes and respiratory tract
Oxalic acid dust or solution splashing into the eyes may cause severe burns or even permanent damage.
Inhaling oxalic acid dust can irritate the respiratory tract, causing coughing or inflammation.
4. Corrosion of other materials
Oxalic acid has a corrosive effect on calcium-containing materials such as concrete and marble (forming calcium oxalate), but its corrosiveness to certain plastics (such as polyethylene) is relatively low.