Quality Specification | ||||
Analysis items | Standard | Specification | ||
Super Grade | First Grade | Normal Grade | Performance | |
Appearance | Clear and free of suspended matter | Qualified | ||
Hazen Colour(Pt-Co) | <=10 | <=20 | <=30 | 5 |
Assay % | >=99.8 | >=99.5 | >=98.5 | 99.8 |
Moisture % | <=0.15 | <=0.20 | -- | 0.04 |
Formic Acid % | <=0.05 | <=0.10 | <=0.30 | 0.01 |
Acetaldehyde % | <=0.03 | <=0.02 | <=0.03 | <0.01 |
Evaporation Residue % | <=0.01 | <=0.02 | <=0.03 | <0.01 |
Iron % | <=0.00004 | <=0.0002 | <=0.0004 | 0.00002 |
Permanganate Time min | >=30 | >=5 | - | >30 |
Grade | GB/T 1628-2008 |
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