Difference between revisions of "Potassium sulfate"
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Colorless crystals or white powder. Potassium sulfate is used in the manufacture of gypsum cements, fertilizers, alums, and potassium glass. In a closed environment, a saturated solution of potassium sulfate will form an equilibrium at a relative humidity of about 97% (20C). | Colorless crystals or white powder. Potassium sulfate is used in the manufacture of gypsum cements, fertilizers, alums, and potassium glass. In a closed environment, a saturated solution of potassium sulfate will form an equilibrium at a relative humidity of about 97% (20C). | ||
| − | + | [[[SliderGallery rightalign|potassium sulfate.jpg~Chemical structure]]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
potassium sulphate (Br.); sulfate of potash; sulfate of potass; sal polychrest; | potassium sulphate (Br.); sulfate of potash; sulfate of potass; sal polychrest; | ||
| − | + | == Risks == | |
| − | |||
| − | == | ||
| − | + | * Toxic in large amounts by ingestion. | |
| + | * ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC424220010&productDescription=POTASSIUM+SULFATE%2C+ANHYD+1KG&vendorId=VN00032119&countryCode=US&language=en SDS] | ||
| + | == Physical and Chemical Properties == | ||
| − | Deliquescent point at 20C is 97.2 % RH (see [http://cameo.mfa.org/materials/fullrecord.asp?name=saturated%20salt%20solutions saturated salt solutions]) | + | * Soluble in water (pH about 7) and glycerol. Insoluble in ethanol. |
| + | * Deliquescent point at 20C is 97.2 % RH (see [http://cameo.mfa.org/materials/fullrecord.asp?name=saturated%20salt%20solutions saturated salt solutions]) | ||
{| class="wikitable" | {| class="wikitable" | ||
| Line 24: | Line 25: | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 1067-1072 | + | | 1067-1072 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.66 | + | | 2.66 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 33: | Line 34: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 1689 | + | | 1689 C |
|} | |} | ||
| − | == | + | == Resources and Citations == |
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* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 33 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 33 | ||
Latest revision as of 10:39, 25 August 2022
Description
Colorless crystals or white powder. Potassium sulfate is used in the manufacture of gypsum cements, fertilizers, alums, and potassium glass. In a closed environment, a saturated solution of potassium sulfate will form an equilibrium at a relative humidity of about 97% (20C).
Synonyms and Related Terms
potassium sulphate (Br.); sulfate of potash; sulfate of potass; sal polychrest;
Risks
- Toxic in large amounts by ingestion.
- ThermoFisher: SDS
Physical and Chemical Properties
- Soluble in water (pH about 7) and glycerol. Insoluble in ethanol.
- Deliquescent point at 20C is 97.2 % RH (see saturated salt solutions)
| Composition | K2SO4 |
|---|---|
| CAS | 7778-80-5 |
| Melting Point | 1067-1072 C |
| Density | 2.66 g/ml |
| Molecular Weight | mol. wt. = 174.26 |
| Boiling Point | 1689 C |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 33
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7845