Oxalic Acid 5% Solution
A product which is usually used in stain removal, tanning and removing rust. A powerful cleaner capable of cleaning metal in many industries and other lab processes.
Oxalic acid's main applications include cleaning or bleaching, especially for the removal of rust (iron complexing agent). Its utility in rust removal agents is due to its forming a stable, water-soluble salt with ferric iron. Oxalic acid is an important reagent in lanthanide chemistry. Hydrated lanthanide oxalates form readily in very strongly acidic solutions in a densely crystalline, easily filtered form, largely free of contamination by nonlanthanide elements. Thermal decomposition of these oxalate gives the oxides, which is the most commonly marketed form of these elements.
There are so many lists of how to use this product - this link may help you http://www.constructionchemicals.co.uk/blog/2015/07/13/how-to-use-oxalic-acid/
We do not include usage instructions - please see link above