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Oxalic Acid 5 Percent Solution

Oxalic Acid 5% Solution remove stains; such as ink from wood, rust stains from a variety of materials such as concrete. It also mildly bleaches wood. This Acid can also help with the removal of rust from metal surfaces. Oxalic Acid is also used for cleaning fibreglass boat decks and hulls, however it is found naturally in many plants.


Oxalic Acid 5 Percent Solution

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Oxalic Acid 5% Solution

Available in Various Sizes


Oxalic Acid 5% Solution is a diluted form of oxalic acid, a naturally occurring organic compound with the chemical formula C2H2O4. It’s primarily known for its effectiveness in various cleaning and maintenance tasks due to its acidic properties.  It has multiple Uses and Applications such as removing stains from surfaces  such as ink from wood, rust stains from a variety of materials such as concrete. It also mildly bleaches wood. This Acid can also help with the removal of rust from metal surfaces. Oxalic Acid is also used for cleaning fibreglass boat decks and hulls.


Cleaning Agent: Particularly effective in removing rust and iron stains. It is used to clean a variety of surfaces, including metals, tiles, and plastics.


Bleaching Wood: Used in woodworking to lighten wood and remove dark stains or watermarks.


Laundry Stain Remover: Oxalic Acid 5% Solution Can be applied to fabrics to remove stubborn stains like ink and food residues.


Beekeeping: Used as a miticide for controlling Varroa mite infestations in bee hives.


Laboratory Use: In scientific settings, it’s utilized as a reagent and for cleaning purposes.



Handling and Safety:

Oxalic Acid 5% Solution must be handled with care. It is recommended to use protective gloves and eyewear during use.

In case of contact with skin or eyes, immediate rinsing with plenty of water is advised.

The solution should be stored in a cool, well-ventilated area, away from direct sunlight and heat sources.


Environmental Impact:

Oxalic acid is biodegradable and has a low environmental persistence. However, it should not be disposed of in large quantities in the environment without proper treatment.



Small amounts can be neutralized with baking soda and flushed down the drain with plenty of water. For larger quantities, follow local regulations for chemical disposal.



Avoid ingestion and inhalation as it  can lead to health hazards including irritation of the digestive or respiratory tracts.

It is corrosive in nature and can cause burns on prolonged exposure.


Product Packaging:

Available in various sizes, from small bottles that are 250ml and 500ml to larger containers like 5L and 25L.



The top ten uses of Oxalic Acid 5% Solution:


Rust Removal: Oxalic Acid 5% Solution is effective in removing rust from various surfaces, including metals and fabrics.


Bleaching Agent: It can act as a bleaching agent for wood and is used to lighten or remove stains from wood.


Cleaning Agent: It’s used in cleaning solutions to remove tough stains and buildup from surfaces like countertops, tiles, and sinks.


Leather Tanning: In the leather industry, oxalic acid is used in the tanning process.


Dyeing Process: It’s used as a mordant in dyeing processes, helping to fix dyes to fabrics.


Removing Ink Stains: Oxalic Acid 5% Solution is effective in removing ink stains from various materials.


Stone Cleaning: It can clean certain types of stone surfaces, removing stains and restoring their natural appearance.


Water Treatment: In small concentrations, it can be used to purify water by removing certain minerals and contaminants.


Pharmaceuticals: Used in small amounts in the pharmaceutical industry for various manufacturing processes.


Laboratory Use: It’s used in laboratories as a reagent and for cleaning lab equipment.


Always remember, when handling oxalic acid, even in diluted forms like a 5% solution, it’s important to use appropriate safety measures, including gloves and eye protection, as it can be harmful if inhaled, ingested, or if it comes into contact with skin.




Frequently asked questions about Oxalic Acid 5% Solution:


What is Oxalic Acid?

Oxalic Acid is an organic compound known as Ethane dioic acid. It appears as a colourless, transparent crystalline solid, primarily existing in dihydrate form.


What are the uses of Oxalic Acid?

It is widely used as a cleaning and bleaching agent, for stain removal, rust removal, and polishing. Oxalic Acid is also employed in beekeeping as a miticide against parasitic Varroa mites.


How should Oxalic Acid be handled and stored?

Oxalic Acid should be stored in tightly closed containers in a cool, ventilated area, away from moisture and combustibles. It’s important to handle it with good industrial hygiene and safety practices, including using protective gear and facilities for quick drenching or flushing of eyes and bodies in contact with the acid.


What are the environmental impacts of Oxalic Acid?

Oxalic Acid is found naturally in the environment. It has low persistence, no potential for food chain accumulation, and degrades in both aerobic and anaerobic conditions.


How is Oxalic Acid 5% Solution disposed of?

It can be diluted in a large container of ice water, then neutralized with baking soda until the solution reaches a pH of 7 (or at least 5.5). After neutralization, it can be safely poured down the drain with an excess amount of water.


What are the hazards of Oxalic Acid 5% Solution?

Oxalic Acid can be harmful to humans, causing severe burns to eyes, skin, and mucous membranes. Ingestion of significant amounts can be fatal, with symptoms like nausea, shock, collapse, and convulsions. Prolonged skin contact may cause rashes, redness, blisters, and slow-healing ulcers.



Chemical Composition and Physical Properties:
  • Oxalic acid in this solution is typically at a 5% concentration, mixed with water.
  • It appears as a clear, colourless liquid.
  • The solution has an acidic pH due to the nature of oxalic acid.


There are so many lists of how to use this product – this link may help you


We do not include usage instructions – please see link above



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Additional information

Weight 1 kg


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