Merck, 1005731000, ortho-Phosphoric acid 85%

General description
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for analysis EMSURE® ACS,ISO,Reag. Ph Eur
Application
ortho-Phosphoric acid can be used as a: Reactant in the synthesis of polyurethane ionomer films through etherification with polyoxypropylene glycol in the presence of tertiary amines.
Catalyst in pinacolic rearrangement reactions when it is supported on silica.
Phosphorus source in the synthesis of diaryl phosphates.

Analysis Note
Assay (alkalimetric)≥ 85.0 %
Identitypasses test
Appearance of solutionpasses test
Color≤ 10 Hazen
Chloride (Cl)≤ 2 ppm
Fluoride (F)≤ 1 ppm
Nitrate (NO₃)≤ 3 ppm
Phosphite and Hypophosphite (as H₃PO₃)≤ 20 ppm
Hypophosphite, phosphitepasses test
Heavy metals (as Pb)≤ 10 ppm
Sulfate (SO₄)≤ 20 ppm
As (Arsenic)≤ 0.5 ppm
Ca (Calcium)≤ 20 ppm
Cd (Cadmium)≤ 0.5 ppm
Co (Cobalt)≤ 0.5 ppm
Cu (Copper)≤ 0.5 ppm
Fe (Iron)≤ 10 ppm
K (Potassium)≤ 5 ppm
Mg (Magnesium)≤ 5 ppm
Mn (Manganese)≤ 0.5 ppm
Na (Sodium)≤ 200 ppm
Ni (Nickel)≤ 1.0 ppm
Pb (Lead)≤ 0.5 ppm
Sb (Antimony)≤ 5 ppm
Zn (Zinc)≤ 2 ppm
Matter precipitated by ammoniapasses test
Volatile acids (as Acetic acid)≤ 10 ppm
Substances reducing potassium permanganate (as O)≤ 10 ppm
Insoluble matter≤ 10 ppm

Other Notes
Concentrated phosphoric acid is approx. 85% H₃PO₄ (aqueous).
Legal Information
EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany