ISO 2997 Phosphoric Acid Test for Industrial Use

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 2997 testing. This standard applies to products with a sulfate content equal to or greater than 0,0005% (m/m).

It is the analysis by reduction of sulfate to sulfide with a mixture of hydroiodic acid and hypophosphorous acid.

The absorption of hydrogen sulfide was enhanced in a mixture of acetone and sodium hydroxide solution. Titration with standard volumetric mercury(II) acetate solution in the presence of dithizone as an indicator. It is also approved by IUPAC.

Phosphoric acid is produced industrially by a wet method where sulfuric acid reacts with apatite (tricalcium phosphate rock).

The resulting phosphoric acid solution is about 32-46% H3PO4, so it is then concentrated (by water evaporation) to produce a commercial grade of higher concentration of phosphoric acid.

Pure phosphoric acid is a white crystalline solid with a melting point of 42.35 °C. When less concentrated, it is a colorless, odorless, viscous liquid with a density of 1.885 g/mL. It is non-toxic and non-volatile. The most common phosphoric acid concentration is 85% in water.

EUROLAB assists manufacturers with ISO 2997 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.