Sodium Sulfate CAS#7757-82-6
Naturally Occurring and Industrially Useful – Sodium sulfate exists naturally as thenardite and can be sourced from regions like Chile and Spain, providing a reliable raw material for industrial applications.
High Melting Point – With a melting point of 888°C (1632°F), it is thermally stable, making it suitable for high-temperature processes such as glass and paperboard manufacturing.
Versatile Applications – Used widely in the production of paperboard, glass, freezing mixtures, and sodium bisulfate, demonstrating broad industrial utility.
Water-Soluble Hydrate Form – The decahydrate form, known as Glauber’s salt, is a stable, water-soluble compound used in dyeing, glass production, and other chemical processes.
Parameters
| Melting point | 884 °C (lit.) |
| Boiling point | 1700°C |
| bulk density | 1400-1600kg/m3 |
| density | 2.68 g/mL at 25 °C (lit.) |
| refractive index | 1.484 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| pka | 4.76 |
| form | powder (fine) |
| color | White |
| Specific Gravity | 2.68 |
| Odor | wh. cryst. or powd., odorless, bitter saline taste |
| PH | 5.2-8.0 (50g/l, H2O, 20℃) |
| PH Range | 5.2 - 9.2 |
| Water Solubility | 18.5 mg/L |
| λmax | λ: 260 nm Amax: 0.015 |
| λ: 280 nm Amax: 0.015 | |
| Sensitive | Hygroscopic |
| Merck | 148,680 |
| Dielectric constant | 2.7（Ambient） |
| Stability: | Stable. Incompatible with strong acids, aluminium, magnesium, strong bases. Hygroscopic. |
| LogP | -1.031 (est) |
| CAS DataBase Reference | 7757-82-6(CAS DataBase Reference) |
| NIST Chemistry Reference | Sodium sulfate(7757-82-6) |
| EPA Substance Registry System | Sodium sulfate (7757-82-6) |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 24/25 |
| WGK Germany | 1 |
| RTECS | WE1650000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 28331100 |
| Hazardous Substances Data | 7757-82-6(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Product Application of Sodium Sulfate CAS#7757-82-6
Sodium sulfate is widely used as a filler in synthetic detergents. In the paper industry, it serves as a cooking agent in the production of sulfate pulp. The glass industry utilizes it as a substitute for soda. In the chemical industry, it is employed as a raw material for manufacturing sodium sulfide, sodium silicate, and other chemical products. The textile industry uses it in Vinylon spinning coagulation baths. In pharmaceuticals, it is applied as a laxative, and it is also used in non-ferrous metallurgy and leather processing.
