Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous).

Assay (acidimetric): ≥ 85.0 %

Chloride (Cl): ≤ 500 ppb

Fluoride (F): ≤ 500 ppb

Nitrate (NO₃): ≤ 500 ppb

Sulphate (SO₄): ≤ 10 ppm

Ag (Silver): ≤ 20 ppb

Al (Aluminium): ≤ 20 ppb

As (Arsenic): ≤ 25 ppb

Au (Gold): ≤ 20 ppb

Ba (Barium): ≤ 20 ppb

Be (Beryllium): ≤ 50 ppb

Bi (Bismuth): ≤ 50 ppb

Ca (Calcium): ≤ 50 ppb

Cd (Cadmium): ≤ 20 ppb

Co (Cobalt): ≤ 20 ppb

Cr (Chromium): ≤ 50 ppb

Cu (Copper): ≤ 25 ppb

Fe (Iron): ≤ 200 ppb

Hg (Mercury): ≤ 2 ppb

K (Potassium): ≤ 50 ppb

Li (Lithium): ≤ 20 ppb

Mg (Magnesium): ≤ 20 ppb

Mn (Manganese): ≤ 20 ppb

Mo (Molybdenum): ≤ 20 ppb

Na (Sodium): ≤ 100 ppb

Ni (Nickel): ≤ 25 ppb

Pb (Lead): ≤ 20 ppb

Pt (Platinum): ≤ 100 ppb

Sb (Antimony): ≤ 800 ppb

Sn (Tin): ≤ 50 ppb

Sr (Strontium): ≤ 20 ppb

Tl (Thallium): ≤ 20 ppb

V (Vanadium): ≤ 20 ppb

Zn (Zinc): ≤ 25 ppb

Zr (Zirconium): ≤ 50 ppb

The actual values are subject to unavoidable systematic

variations in this concentration range.