| Industry Grade Succinic Acid | Specification | ||
| Premium Grade | First Grade | Qualified Grade | |
| 1,4-succinic acid | ≥99.7 | ≥99.5 | ≥99.5 |
| Water,w/% | ≤0.40 | ≤0.40 | ≤0.50 |
| Melting point/℃ | 185~188 | 185~188 | 184~188 |
| Iron,w/% | ≤0.001 | ≤0.001 | ≤0.002 |
| Chloride (As Cl-)，w/% | ≤0.002 | ≤0.005 | ≤0.005 |
| Sulfate (As SO42-),w/% | ≤0.01 | ≤0.03 | ≤0.05 |
| Easy oxide/(mL∕g) | ≤0.40 | ≤0.50 | ≤0.60 |
| Heavy metal(As Pb),w/% | ≤0.001 | ≤0.003 | ≤0.005 |
| Burning residue,w/% | ≤0.010 | ≤0.010 | ≤0.025 |
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