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Sodium Sulfate

  • Sodium Sulfate
  • Sodium Sulfate
  • Sodium Sulfate

Sodium Sulfate

Sodium Sulfate
CAS No.: 7757-82-6
Molecular Formula: Na2SO4
Molecular weight: 142.04214

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PRODUCT DESCRIPTION

Sodium Sulfate, with the chemical formula Na₂SO₄, is an inorganic compound. It is a white, odorless crystalline solid, soluble in water, and has stable chemical properties, widely used in various industrial and agricultural fields.


Chemical Properties

PropertyValue
Melting Point884 °C (lit.)
Boiling Point1700°C
Bulk Density1400-1600 kg/m³
Density2.68 g/mL at 25 °C (lit.)
Refractive Index1.484
Storage ConditionsStore at +5°C to +30°C.
SolubilityH₂O: 1 M at 20 °C, clear, colorless
Acid Dissociation Constant (pKa)4.76
FormPowder
ColorWhite
Specific Gravity2.68
OdorWhite crystals or powder, odorless, bitter salty taste
pH Value5.2-8.0 (50g/l, H₂O, 20°C)
pH Range (Indicator)5.2 - 9.2
Water Solubility18.5 mg/L
Wavelength Maximum (λ_max)λ: 260 nm Amax: 0.015
λ: 280 nm Amax: 0.015
SensitivityHygroscopic
Merck14,8680
Dielectric Constant2.7 (Ambient)
StabilityStable. Incompatible with strong acids, aluminum, magnesium, strong bases. Hygroscopic.
Cosmetic Ingredient FunctionsBULKING, VISCOSITY CONTROLLING
InChI1S/2Na.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q2*+1;/p-
InChIKeyPMZURENOXWZQFD-UHFFFAOYSA-L
SMILES[Na+].[Na+].[O-]S([O-])(=O)=O
LogP-1.031 (est)
CAS Database7757-82-6 (CAS DataBase Reference)
NIST Chemical Substances InformationSodium sulfate (7757-82-6)
EPA Chemical Substances InformationSodium sulfate (7757-82-6)


Safety Information

PropertyValue
Hazard SymbolsXi
Hazard Class Codes36/37/38
Safety Description Codes24/25
WGK Germany1
RTECS NumberWE1650000
F3
TSCATSCA listed
HS Code28331100
Storage Class13 - Non-combustible solids
Hazardous Substances Data7757-82-6 (Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: > 2000 mg/kg


Product Usage

Sodium sulfate is an important inorganic chemical raw material. In the detergent industry, it is used as a filler and additive to improve detergency and prevent caking. In the textile and dyeing industry, it serves as an accelerating agent for sulfur dyes and vat dyes, helping dyes adhere evenly, and is also used for degreasing and scouring textile fibers. In the glass and paper industries, it helps clarify glass melts and adjust pulp properties. Additionally, it is used as a degreasing agent in leather processing, and as a drying agent and synthetic raw material in pharmaceuticals and chemicals. Its advantages include wide availability, low cost, and good chemical stability.

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