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Specifications of reagent-grade ammonium sulfate (LOBA Chemie 2020)
| Appearance | Colorless crystals/whitecrystalline powder |
|---|---|
| Assay (titration) | Min 98.5% |
| pH (5% solution; 25 °C) | 4.5–6.0 |
| Heavy metal (as Pb) | Max 0.002% |
| Chloride (Cl) | Max 0.003% |
| Iron (Fe) | Max 0.002% |
| Sulfated ash | Max 0.05% |
