Item	Super	First	Qualified
Color Index	10	20	20
Acetic Acid Acidity,%≥	99.5	99.0	98
Water%≤	0.05	———	———
Formic Acid%≤	0.15	0.15	0.35
Aldehyde %≤	0.05	0.05	0.10
Non-volatiles%≤	0.02	0.02	0.03
Metals，As Fe%≤	0.00004	0.0002	0.0004
Potassium permanganate test ,Min≥	30	5	———