Sodium Sulfate
Structural Formula Vector Image
Title: Sodium Sulfate
CAS Registry Number: 7757-82-6
Molecular Formula: Na2O4S
Molecular Weight: 142.04
Percent Composition: Na 32.37%, O 45.06%, S 22.57%
Line Formula: Na2SO4
Literature References: Occurs in nature as the minerals mirabilite, thenardite. Industrial production: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) p 762-768.
Properties: Anhydrous form, salt cake (technical grade). Powder or orthorhombic bipyramidal crystals, mp ~800°. d 2.7. Sol in ~3.6 parts water. Max soly at 33°: 1 in 2. Above this temp the soly gradually decreases and at 100° requires 2.4 parts water. Insol in alcohol.
Melting point: mp ~800°
Density: d 2.7
Derivative Type: Decahydrate
Additional Names: Glauber's salt
Molecular Formula: Na2O4S.10H2O
Molecular Weight: 322.19
Percent Composition: Na 14.27%, O 69.52%, S 9.95%, H 6.26%
Properties: Odorless, efflorescent crystals or granules, mp 32.4°. d 1.46. Loses all its water at 100°. Sol in 1.5 parts water at 25°, in 3.3 parts water at 15°. Soly in water decreased by NaCl. Sol in glycerol; insol in alcohol. The aq soln is neutral. pH 6-7.5. Keep well closed in a cool place.
Melting point: mp 32.4°
Density: d 1.46
Use: For standardizing dyes; in freezing mixtures; in dyeing and printing textiles. The anhydrous form for drying organic liquids; in Kjeldahl nitrogen determination; in manuf of glass, ultramarine, paper pulp.
Therap-Cat: Cathartic.
Therap-Cat-Vet: Purgative.
Keywords: Laxative/Cathartic.

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