| Identification | More | [Name]
SODIUM SULFATE DECAHYDRATE | [CAS]
7727-73-3 | [Synonyms]
GLAUBER'S SALT
NATRII SULFAS DECAHYDRICUS
SODIUM SULFATE
SODIUM SULFATE, 10-HYDRATE
SODIUM SULFATE DECAHYDRATE
SODIUM SULFATE DODECAHYDRATE
SODIUM SULFATE, HYDROUS
SODIUM SULPHATE 10-HYDRATE
SODIUM SULPHATE DECAHYDRATE
SODIUM SULPHATE IOH2O
sopdiumsulfatedecahydrate
Sodium sulfafe decahydrate
Sodium sulfate hydrated
GLAUBER SALT
SODIUM SULFATE DECAHYDRATE 99+% &
SODIUM SULFATE DECAHYDRATE, CRYSTALLIZED
SODIUM SULFATE DECAHYDRATE ACS REAGENT
SODIUM SULFATE-10-HYDRATE R. G., REAG. A CS
SODIUM SULFATE DECAHYDRATE, PH EUR
SODIUM SULFATE DECAHYDRATE REAGENT GRA& | [EINECS(EC#)]
231-820-9 | [Molecular Formula]
H20Na2O14S | [MDL Number]
MFCD00149189 | [Molecular Weight]
322.19 | [MOL File]
7727-73-3.mol |
| Chemical Properties | Back Directory | [Appearance]
crystals | [Melting point ]
32-38°C | [density ]
1.46 g/mL at 25 °C(lit.)
| [storage temp. ]
2-8°C
| [solubility ]
H2O: 1 M at 20 °C, clear, colorless
| [form ]
Solid | [color ]
White | [Specific Gravity]
1.46 | [PH]
5.2-8.0 (50g/l, H2O, 25℃)(anhydrous substance) | [Stability:]
Stable. Incompatible with strong acids, aluminium, magnesium. | [Water Solubility ]
Soluble in water and glycerin. Insoluble in ethanol and methanol. | [λmax]
λ: 260 nm Amax: ≤0.025
λ: 280 nm Amax: ≤0.021 | [Merck ]
14,8680 | [InChIKey]
RSIJVJUOQBWMIM-UHFFFAOYSA-L | [LogP]
-1.031 (est) | [CAS DataBase Reference]
7727-73-3(CAS DataBase Reference) | [EPA Substance Registry System]
Disodium sulfate decahydrate (7727-73-3) |
| Questions And Answer | Back Directory | [Occurrence]
Sodium sulfate occurs in nature as the minerals mirabilite and thenardite. While thenardite is the anhydrous form of Na2SO4, mirabilite is a naturallyoccurring decahydrate, Na2SO4•10H2O.
Sodium sulfate is one of the most important sodium salts. The decahydrate,commonly known as the Glauber’s salt, was first prepared by Johann Glauber in the seventeenth century as a by-product in making hydrochloric acid from sulfuric acid and sodium chloride.
| [Physical Properties]
Anhydrous sodium sulfate is a white crystalline powder; orthorhombic or hexagonal structure; hygroscopic; refractive index 1.468; hardness 2.8 Mohs; density 2.664 g/cm3; melts at 884°C; soluble in water, insoluble in ethanol.
The decahydrate consists of colorless monoclinic crystals; refractive index 1.394; hardness 1.8 Mohs; density 1.4 6g/cm3; decomposes at 32°C; soluble in water; insoluble in ethanol.
| [Production]
Sodium sulfate is mined from its natural mineral deposits and subjected to purification. Sodium sulfate is synthesized by the Mannheim process or Hargreaves process. Manheim’s process is based on Glauber’s reaction between sulfuric acid and sodium chloride:
2NaCl + H2SO4 → Na2SO4 + 2HCl↑
The process was devised by Johann Glauber to produce hydrochloric acid. Sodium sulfate is isolated from the solution by fractional crystallization. Hargreaves’ process also was developed to produce hydrochloric acid. It is a variation of Mannheim’s method. In this method, sulfur dioxide is used instead of sulfuric acid. The reaction is as follows:
4NaCl + 2SO2 + O2 + 2H2O → 2Na2SO4 + 4HCl↑
Sodium sulfate also is obtained as a byproduct of manufacturing phenol by caustic fusion.
|
| Hazard Information | Back Directory | [Chemical Properties]
White or almost white, crystalline powder or colourless, transparent crystals. | [Uses]
Sodium sulfate decahydrate is used in manufacturing paper pulp by the Kraft Process. Other uses are in manufacturing glass and ultramarine; in dyeing and printing textiles; as a filler in synthetic detergents; and for standardizing dyes. A major use of anhydrous sodium sulfate is as an agent to remove water from organic solvents and their extracts for organic synthesis and instrumental analysis. Sodium sulfate decahydrate is a common laboratory reagent. Also, it is used to prepare other sodium salts.
| [Definition]
ChEBI: Sodium sulfate decahydrate is a hydrate. It has a role as a cathartic. It contains a sodium sulfate. | [General Description]
Sodium sulfate decahydrate (Glauber′s salt, mirabilite, Na2SO4·10H2O) is the decahydrate salt of sodium sulfate. Its crystal structure has been investigated by single-crystal neutron diffraction studies. Its crystallization enthalpy has been evaluated. It can be synthesized by reacting MnSO4, thiophene-2,5-dicarboxylic acid and sodium glutamate. | [Purification Methods]
Crystallise sodium sulfate from water at 30o (1.1mL/g) by cooling to 0o. It becomes anhydrous at 32o. |
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