Copper (ii) sulfate pentahydrate
| Formula | CuSO4*5H2O |
| Density | 2.29 g/cm3 |
| Molar mass | 249.68 g/mol |
| CAS number | 7758-99-8 |
| HS code | 28332500 |
| EC number | 231-847-6 |
| Storage (temprature) | Without limitation |
| SDS | Available |
| RTECS | GL8900000 |
| R phrase | R 22-36/38-50/53 |
| S phrase | S 22 -60-61 |
| Assay | 98.5 – 100.5 | % | |
| Description | Conforms | ||
| Solubility | Conforms | ||
| Identification | Conforms | ||
| Appearance of solution | Conforms | ||
| Chloride | 0.01 | % | |
| Fe | ≤ | 0.003 | % |
| Pb | ≤ | 0.005 | % |
| Ni | ≤ | 0.005 | % |
| Ca | ≤ | 0.005 | % |
| Na | ≤ | 0.02 | % |
| K | ≤ | 0.01 | % |
| Loss on drying (250 °c) | ≤ | 35.0 – 36.5 | % |
Copper (II) sulfate pentahydrate is a bright blue crystalline compound widely used in chemistry education, agriculture, and various industrial applications.
🏭⚗️ Production
Copper (II) sulfate pentahydrate is produced by dissolving copper metal or copper(II) oxide in sulfuric acid, followed by crystallization upon cooling. The resulting crystals incorporate five molecules of water per formula unit.
🔬 Properties
Copper (II) sulfate pentahydrate appears as vibrant blue, triclinic crystals with the chemical formula CuSO₄·5H₂O and a molar mass of approximately 249.68 g/mol. It is soluble in water, has a melting point around 110°C (with loss of water), and decomposes at higher temperatures. It is hygroscopic and turns white upon dehydration.
🧪 Applications
Copper (II) sulfate pentahydrate is used as a fungicide and algicide in agriculture, as an analytical reagent in laboratories (e.g. Benedict’s and Fehling’s solutions), and in electroplating and dyeing processes. It also serves as a root killer in plumbing and as a supplement in animal feed.
⚠️ Safety
Copper (II) sulfate pentahydrate is harmful if ingested and can cause irritation to the skin, eyes, and respiratory system. It is toxic to aquatic organisms and should be handled with gloves and eye protection. It must be stored in a sealed container away from moisture and incompatible materials such as reducing agents.
