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Pyridine

Item	Index
Pyridine ω /% ≥	99.9
Chroma, Hazzen units (platinum-cobalt number)	20
Water ω /% ≤	0.1
Residue on Evaporation ω /% ≤	0.01
Chloride (as CL) ω /% ≤	0.0005
Sulfate ( calculated as SO₄) ω /% ≤	0.001
Ammonia (NH₃) ω /% ≤	0.02
Copper (Cu) test	passed experiments
Density p20 (g/cm³)	0.980-0.985
Test of reducing potassium permanganate	passed experiments
Mxiture with water	passed experiments