Assay (by titration): ≥ 99.7%.
Appearance: Clear, colorless liquid with characteristic odor.
Crystallizing Point: ≥ 16.0°C.
Residue on Evaporation: ≤ 0.001%.
Chloride (Cl): ≤ 0.5 ppm.
Sulfate (SO₄): ≤ 1 ppm.
Heavy Metals (as Pb): ≤ 0.2 ppm.
Iron (Fe): ≤ 0.2 ppm.
Substances Reducing KMnO₄: Passes test (≥ 60 minutes).
Reaction with Chromic Acid: Indifferent (no green coloration).
Formic Acid: ≤ 0.03%.
Acetaldehyde: ≤ 0.002%.
Water Content (Karl Fischer): ≤ 0.1%.
Permanganate Time: ≥ 90 minutes.
Nitrate (NO₃): ≤ 0.5 ppm.