Manganese(II) sulfate

Manganese(II) sulfate
Manganese(II) sulfate

Manganese(II) sulfate monohydrate

Manganese(II) sulfate tetrahydrate
Identifiers
CAS number 7785-87-7 YesY
10034-96-5 (monohydrate)
10101-68-5 (tetrahydrate)
PubChem 24580
ChemSpider 22984 YesY
UNII IGA15S9H40 YesY
EC number 232-089-9
ChEMBL CHEMBL1200557 N
RTECS number OP1050000 (anhydrous)
OP0893500 (tetrahydrate)
Jmol-3D images Image 1
Properties
Molecular formula MnSO4
Molar mass 151.001 g/mol (anhydrous)
169.02 g/mol (monohydrate)
223.07 g/mol (tetrahydrate)
Appearance pale pink crystalline solid (tetrahydrate)
Density 3.25 g/cm 3 (anhydrous)
2.95 g/cm3 (monohydrate)
2.107 g/cm3 (tetrahydrate)
Melting point

710 °C (anhydrous)
27 °C (tetrahydrate)

Boiling point

850 °C (anhydrous)

Solubility in water 393 g/L (24 °C)
262 g/L (100 °C)
Structure
Crystal structure orthogonal (anhydrous)
monoclinic (monohydrate)
monoclinic (tetrahydrate)
Hazards
MSDS ICSC 0290
EU Index 025-003-00-4
EU classification Harmful (Xn)
Dangerous for the environment (N)
R-phrases R48/20/22, R51/53
S-phrases (S2), S22, S61
NFPA 704
NFPA 704.svg
0
1
1
Related compounds
Other cations Chromium(III) sulfate
Iron(II) sulfate
 N sulfate (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Manganese(II) sulfate usually refers to the inorganic compound with the formula MnSO4(H2O). This pale pink deliquescent solid is a commercially significant manganese(II) salt. Approximately 260 thousand tonnes of manganese(II) sulfate were produced worldwide in 2005.[1] It is the precursor to manganese metal and many other chemical compounds. Mn-deficient soil is remediated with this salt.

Structure

Like many metal sulfates, manganese sulfate forms a variety of hydrates: monohydrate, tetrahydrate, pentahydrate, and heptahydrate. The monohydrate is most common. All of these salts dissolve to give faintly pink solutions of the aquo complex [Mn(H2O)6]2+. The pale pink colour of Mn(II) salts is highly characteristic.

Applications and production

Typically, manganese ores are purified by their conversion to manganese(II) sulfate. Treatment of aqueous solutions of the sulfate with sodium carbonate leads to precipitation of manganese carbonate, which can be calcined to give the oxides MnOx. In the laboratory, manganese sulfate can be made by treating manganese dioxide with sulfur dioxide:[2]

MnO2 + SO2 → MnSO4

Manganese sulfate is a by-product of various industrially significant oxidations that use manganese dioxide, including the manufacture of hydroquinone and anisaldehyde.[1]

Electrolysis of manganese sulfate yields manganese dioxide, which is called EMD for electrolytic manganese dioxide. Alternatively oxidation of manganese sulfate with potassium permanganate yields the so-called chemical manganese dioxide (CMD). These materials, especially EMD, are used in dry-cell batteries.[1]

References

  1. ^ a b c Arno H. Reidies "Manganese Compounds" Ullmann's Encyclopedia of Chemical Technology 2007; Wiley-VCH, Weinheim. doi:10.1002/14356007.a16_123
  2. ^ John R. Ruhoff (1943), "n-Heptanoic acid", Org. Synth., http://www.orgsyn.org/orgsyn/orgsyn/prepContent.asp?prep=cv2p0315 ; Coll. Vol. 2: 315 

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Look at other dictionaries:

  • manganese(II) sulfate — mangano(II) sulfatas statusas T sritis chemija formulė MnSO₄ atitikmenys: angl. manganese(II) sulfate rus. марганец(II) сернокислый; марганца(II) сульфат ryšiai: sinonimas – mangano tetraoksosulfatas …   Chemijos terminų aiškinamasis žodynas

  • manganese(III) sulfate — mangano(III) sulfatas statusas T sritis chemija formulė Mn₂(SO₄)₃ atitikmenys: angl. manganese(III) sulfate rus. марганец сернокислый окисный; марганца(III) сульфат ryšiai: sinonimas – dimangano tris(tetraoksosulfatas) …   Chemijos terminų aiškinamasis žodynas

  • Manganese(II) sulfide — IUPAC name Manganese(II) sulfide …   Wikipedia

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  • sulfate — [ sylfat ] n. m. • 1787; de sulf(o) et suff. chim. ate ♦ Sel ou ester de l acide sulfurique. ⇒vx couperose, vitriol. Sulfates acides. ⇒ bisulfate. Sulfates et persulfates. Sulfates naturels de plomb, de calcium hydraté. ⇒ gypse. Sulfate de cuivre …   Encyclopédie Universelle

  • sulfaté — sulfate [ sylfat ] n. m. • 1787; de sulf(o) et suff. chim. ate ♦ Sel ou ester de l acide sulfurique. ⇒vx couperose, vitriol. Sulfates acides. ⇒ bisulfate. Sulfates et persulfates. Sulfates naturels de plomb, de calcium hydraté. ⇒ gypse. Sulfate… …   Encyclopédie Universelle

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