Instrument Disinfectant

Colour : Pale Yellow Shelf life : 2 Years Re-use life : 14 Days pH : 7.5 (Neutral) Pack size : 1000 ML, 5000 ML

Product Description : The reason to use phosphoric acid in particular for rust removal is that phosphoric acid, after dissolving the rust, will attack the unoxidized iron underneath (often with the help of an added oxidizer like a nitrite salt) to form iron phosphate in solution; since phosphate salts are almostly universally insoluble except in acidic conditions and the reaction uses up acid causing a reduction in the acidity, the iron phosphate falls out of solution and deposits on the iron, forming a sort of phosphate patina; this is helped along by the fact that most commercial phosphoric acid treatments include phosphate salts pre-dissolved in the acid, and they also fall out of solution once the acidity starts dropping when the acid is applied to metal. This, essentially, uses up the available iron on the surface before it can turn into rust.