描述
| Item | Index | ||
| Premium grade | First class | Qualified | |
| Appearance | Transparent liquid without visible impurities | ||
| Assay, w/% ≥ | 99.9 | 99.5 | |
| Methanol, w/% ≤ | 0.0010 | 0.0030 | 0.0050 |
| Heavy ends(as DMAc), w/% | To be agreed upon by Buyer and Seller | ||
| Color (Hazen), (Pt-Co) ≤ | 5 | 10 | 20 |
| Moisture, w/% ≤ | 0.050 | ||
| Iron, w/(mg/kg) ≤ | 0.05 | ||
| Acidity (as formic acid), w/% ≤ | 0.0010 | 0.0020 | 0.0030 |
| Bacisity (as DMA), w/% ≤ | 0.0010 | 0.0020 | 0.0030 |
| PH (25 ° C, 20% solution) | 6.5-8.0 | ||
| Conductivity (25 ° C)/μ s/cm ≤ | 2.0 | - | |
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Lithopone