Products Description of Sodium sulfate CAS#7757-82-6
Sodium sulfate (CAS No. 7757-82-6, chemical formula: Na₂SO₄), also known as thenardite and salt cake, is a crystalline compound with a melting point of 888°C (1632°F).
In its natural form (called thenardite), sodium sulfate is found in Chile and Spain. It is used in the production of paperboard, glass, and freezing mixtures. Its hydrate, Na₂SO₄·10H₂O—also referred to as "Glauber's salt"—is a white, water-soluble solid. It is formed by heating sodium chloride and sulfuric acid, and is used in dyeing, glass manufacturing, and the preparation of sodium bisulfate.
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 |
Sensitive | Hygroscopic |
Merck | 14,8680 |
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
It has a wide range of uses across industries. It is commonly employed as a filler in synthetic detergents.
In the paper industry, it serves as a cooking agent during the production of sulfate pulp. The glass industry uses it as a substitute for soda ash. In the chemical industry, it acts as a raw material for manufacturing chemical products such as sodium sulfide and sodium silicate.
For the textile industry, it is applied in the formulation of coagulation baths for vinylon spinning. The pharmaceutical industry utilizes it as a laxative. Additionally, it can be used in non-ferrous metallurgy and the leather industry.
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