CAS 7757-82-6 Sodium sulfate - Materials / Alfa Chemistry

NAVIGATION

Sodium sulfate

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Catalog Number

ACM7757826

CAS Number

7757-82-6

Product Name

Sodium sulfate

Structure

Category

Electrolytes

Synonyms

Disodium sulfate

Description

Sodium sulfate is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are White solids that are highly soluble in water. With an annual production of 6 million tonnes, the decahydrate is a major commodity chemical product. It is mainly used for the manufacture of detergents and in the Kraft process of paper pulping.

IUPAC Name

Disodium;sulfate

Molecular Weight

142.04

Molecular Formula

Na2O4S

Canonical SMILES

[O-]S(=O)(=O)[O-].[Na+].[Na+]

InChI

InChI=1S/2Na.H₂O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q2*+1;/p-2

InChI Key

PMZURENOXWZQFD-UHFFFAOYSA-L

Boiling Point

1700 °C

Melting Point

884 °C

Purity

99%+

Density

2.68 g/mL at 25 °C (lit.)

Solubility

Soluble in glycerin, insoluble in alcohol

Appearance

White powder

Storage

Store at +5 °C to +30 °C

Color/Form

Powder or orthorhombic bipyramidal crystals;White orthorhombic crystals or powder

Complexity

62.2

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.

Covalently-Bonded Unit Count

EC Number

231-820-9;268-366-6;268-773-9;270-211-2

Exact Mass

141.93126821

Formal Charge

Heavy Atom Count

ICSC Number

0952

Log P

-0.25720

MeSH Entry Terms

disodium sulfate;mangxiao;mirabilitum;natrii sulphas;puxiao;sodium bisulfate;sodium bisulfate, monohydrate;sodium hydrosulfate;sodium sulfate;sodium sulfate, 35S-labeled cpd;sodium sulfate, decahydrate;sulfuric acid, monosodium salt;thenardite

Monoisotopic Mass

141.93126821

Odor

Odorless

Other Experimental

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/;Density: 1.46; loses all its water at 100 °C; efflorescent crystals or granules; odorless; aqueous solution is neutral; pH 6 to 7.5; soluble in 1.5 parts water at 25 °C, in 3.3 parts water at 15 °C (solubility in water decreased by sodium chloride); soluble in glycerol; insoluble in alcohol /Sodium sulfate decahydrate/;Transparent, monoclinic crystals; mp: 32.38 °C; index of refraction: 1.394, 1.396, 1.398 /Sodium sulfate decahydrate/;Objectionable taste /Sodium sulfate decahydrate/;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/;Latent heat of fusion: 24.4 kJ at melting point;Heat of formation: -1385 Kj/mole;Entropy: 149.6 J/(mole x K);Heat of solution: 1.17 kJ/mole

Refractive Index

1.484

Rotatable Bond Count

RTECS Number

WE1650000

Stability

Stable. Incompatible with strong acids, aluminium, magnesium, strong bases. Hygroscopic.

Storage Conditions

Store at RT.

Topological Polar Surface Area

88.6 Å²

UNII