Zinc Sulfate Heptahydrate 7446-20-0

1. Basic Information

Chemical Name: Zinc Sulfate Heptahydrate

Chinese Aliases: Zinc Sulfate Heptahydrate; Heptahydrate Zinc Sulfate; White Vitriol; Seven-Water Zinc Sulfate

English Name: Zinc Sulfate Heptahydrate

Molecular Formula: ZnSO₄·7H₂O

Molecular Weight: 287.54

CAS Number: 7446-20-0

EINECS Number: 231-793-3

Appearance: Colorless or white crystals or granules, easily soluble in water, slightly soluble in glycerin, insoluble in ethanol, stable at room temperature, hygroscopic.

2. Technical Parameters

Industrial Grade Zinc Sulfate Heptahydrate

| Test Item | Unit | Index |

| --- | --- | --- |

| | Premium | First Grade | Qualified |

| Content (as Zn) | ≥% | 22.51 | 22.06 | 20.92 |

| Content (as ZnSO₄·7H₂O) | ≥% | 99.0 | 97.0 | 92.0 |

| Insoluble Matter | ≤% | 0.020 | 0.050 | 0.10 |

| pH (50g/L solution) | ≥ | 3.0 | 3.0 | — |

| Chlorides (as Cl) | ≤% | 0.20 | 0.60 | — |

| Lead (Pb) | ≤% | 0.001 | 0.005 | 0.010 |

| Iron (Fe) | ≤% | 0.002 | 0.010 | 0.050 |

| Manganese (Mn) | ≤% | 0.005 | 0.05 | — |

| Cadmium (Cd) | ≤% | 0.001 | 0.005 | 0.010 |

| Chromium (Cr) | ≤% | 0.0005 | — | — |

Reagent Grade Zinc Sulfate Heptahydrate

| Item | Analytical Grade | Chemically Pure |

| --- | --- | --- |

| Clarity Test/No. | ≤3 | ≤5 |

| Water Insoluble, w/% | ≤0.01 | ≤0.02 |

| Chlorides (Cl), w/% | ≤0.0005 | ≤0.002 |

| Total Nitrogen (N), w/% | ≤0.001 | ≤0.002 |

| Arsenic (As), w/% | ≤0.00005 | ≤0.0002 |

| Sodium (Na), w/% | ≤0.05 | ≤0.1 |

| Magnesium (Mg), w/% | ≤0.005 | ≤0.01 |

| Potassium (K), w/% | ≤0.01 | ≤0.02 |

| Calcium (Ca), w/% | ≤0.005 | ≤0.01 |

| Manganese (Mn), w/% | ≤0.0003 | ≤0.001 |

| Iron (Fe), w/% | ≤0.0005 | ≤0.002 |

| Copper (Cu), w/% | ≤0.001 | ≤0.005 |

| Cadmium (Cd), w/% | ≤0.0005 | ≤0.002 |

| Lead (Pb), w/% | ≤0.001 | ≤0.01 |

(The above parameters are for reference only; please refer to the factory inspection sheet for exact values.)

3. Packaging Specifications

The regular packaging is 25kg per bag or 40kg per bag.