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Product Name: Sodium sulfate

Formula: Na2SO4

Synonyms: Disodium Sulfate;Natrii sulfas anhydricus;Sodium sulfate;Sodium Sulfate Anhydrous

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CHEMICAL AND PHYSICAL PROPERTIES COMPUTED DESCRIPTORS PRODUCT INTRODUCTION RELATED SUPPLIERS

CHEMICAL AND PHYSICAL PROPERTIES

Physical Description	Dry Powder; Dry Powder, Liquid, Other Solid; Dry Powder, Other Solid; Dry Powder, Pellets or Large Crystals; Dry Powder, Pellets or Large Crystals, Liquid; Dry Powder, Water or Solvent Wet Solid; Gas or Vapor; Liquid; Liquid, Other Solid; Other Solid; Pellets or Large Crystals; Water or Solvent Wet Solid
Color/Form	Powder or orthorhombic bipyramidal crystals
Odor	Odorless
Taste	Bitter saline taste
Melting Point	884 °C
Solubility	In water, 28.1 g/100 g water at 25 °C
Density	2.671
Stability/Shelf Life	Stable under recommended storage conditions.
Decomposition	When heated to decomposition it emits toxic fumes of sulfur oxides and sodium oxide.
Viscosity	2.48 (22% solution at 20 °C)
Corrosivity	The rates of corrosion of iron and steel in water are a function of the specific mineral quality as well as the alkalinity and pH values. Sodium sulfate ... is a strong contributor to the rate of corrosion. For example, in water with 400 mg/l of alkalinity (as CaCO3) at pH 7, the corrosion rate will be zero at 200 mg/l of Na2SO4, but when the concentration of sodium sulfate is 400 mg/l, the corrosion rate will be about 100 mg per square cm per day.
pH	Neutral or slightly alkaline to litmus paper (5 % solution)
Refractive Index	4.76 g/100 cc water at 0 °C, 42.7 g/100 cc water at 100 °C; soluble in glycerol; insoluble in alcohol; index of refraction: 1.484, 1.477, 1.471 /Natural thenardite/
Dissociation Constants	Sodium sulphate dissociates into Na+ and SO4- ions in water.
Relative Evaporation Rate	Evaporation at 20 °C is negligible
Other Experimental Properties	Transition point to anhydrous form is 24.4 °C; white, rhombic or tetragonal; 19.5 g/100 cc water at 0 °C, 44 g/100 cc water at 20 °C/Sodium sulfate heptahydrate/
Chemical Classes	Other Classes -> Sulfur Compounds

COMPUTED DESCRIPTORS

Molecular Weight	142.04 g/mol
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	0
Exact Mass	141.93126821 g/mol
Monoisotopic Mass	141.93126821 g/mol
Topological Polar Surface Area	88.6 Å²
Heavy Atom Count	7
Formal Charge	0
Complexity	62.2
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
Covalently-Bonded Unit Count	3
Compound Is Canonicalized	Yes

PRODUCT INTRODUCTION

description

Sodium sulfate is a white, odorless, and water-soluble powder that is used in a wide range of applications. It is often referred to as the mineral thenardite when found in its natural form.