Test Item Specification Results Purity ≥99.90% 99.950% Moisture ≤0.1% 0.03% Density 0.789-0.791 0.791 Methanol ≤0.05% Not found Isopropanol ≤0.01% 0.005% Easy carbonized material Qualified Qualified Restore potassium permanganate ≤0.00025% 0.0002%