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Potassium chloride information


Potassium chloride
Names
Other names
  • Sylvite
  • Muriate of potash
Identifiers
CAS Number
  • 7447-40-7 checkY
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:32588 checkY
ChEMBL
  • ChEMBL1200731 ☒N
ChemSpider
  • 4707 checkY
DrugBank
  • DB00761 checkY
ECHA InfoCard 100.028.374 Edit this at Wikidata
E number E508 (acidity regulators, ...)
KEGG
  • D02060 checkY
PubChem CID
  • 4873
RTECS number
  • TS8050000
UNII
  • 660YQ98I10 checkY
CompTox Dashboard (EPA)
  • DTXSID5021178 Edit this at Wikidata
InChI
  • InChI=1S/ClH.K/h1H;/q;+1/p-1 checkY
    Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M checkY
  • InChI=1/ClH.K/h1H;/q;+1/p-1
    Key: WCUXLLCKKVVCTQ-REWHXWOFAZ
SMILES
  • [Cl-].[K+]
Properties
Chemical formula
KCl
Molar mass 74.555 g·mol−1
Appearance white crystalline solid
Odor odorless
Density 1.984 g/cm3
Melting point 770 °C (1,420 °F; 1,040 K)
Boiling point 1,420 °C (2,590 °F; 1,690 K)
Solubility in water
27.77 g/100mL (0 °C)
33.97 g/100mL (20 °C)
54.02 g/100mL (100 °C)
Solubility Soluble in glycerol, alkalies
Slightly soluble in alcohol Insoluble in ether[1]
Solubility in ethanol 0.288 g/L (25 °C)[2]
Acidity (pKa) ~7
Magnetic susceptibility (χ)
−39.0·10−6 cm3/mol
Refractive index (nD)
1.4902 (589 nm)
Structure
Crystal structure
face centered cubic
Space group
Fm3m, No. 225
Lattice constant
a = 629.2 pm[3]
Coordination geometry
Octahedral (K+)
Octahedral (Cl)
Thermochemistry
Std molar
entropy (S298)
83 J·mol−1·K−1[4]
Std enthalpy of
formation fH298)
−436 kJ·mol−1[4]
Pharmacology
ATC code
A12BA01 (WHO) B05XA01 (WHO)
Routes of
administration
Oral, IV, IM
Pharmacokinetics:
Excretion
Kidney: 90%; Fecal: 10%[5]
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)
2600 mg/kg (oral, rat)[6]
Safety data sheet (SDS) ICSC 1450
Related compounds
Other anions
Potassium fluoride
Potassium bromide
Potassium iodide
Other cations
Lithium chloride
Sodium chloride
Rubidium chloride
Caesium chloride
Ammonium chloride
Related compounds
Potassium hypochlorite
Potassium chlorite
Potassium chlorate
Potassium perchlorate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Potassium chloride (KCl, or potassium salt) is a metal halide salt composed of potassium and chlorine. It is odorless and has a white or colorless vitreous crystal appearance. The solid dissolves readily in water, and its solutions have a salt-like taste. Potassium chloride can be obtained from ancient dried lake deposits.[7] KCl is used as a fertilizer,[8] in medicine, in scientific applications, domestic water softeners (as a substitute for sodium chloride salt), and in food processing, where it may be known as E number additive E508.

It occurs naturally as the mineral sylvite, which is named after salt's historical designations sal degistivum Sylvii and sal febrifugum Sylvii,[9] and in combination with sodium chloride as sylvinite.[10]

  1. ^ "Potassium chloride (PIM 430)". International Programme on Chemical Safety. 3.3.1 Properties of the substance. Retrieved 2011-01-17.
  2. ^ "periodic-table-of-elements.org". Archived from the original (website shows values in g/100ml) on 29 October 2020. Retrieved 4 October 2019.
  3. ^ Sirdeshmukh DB, Sirdeshmukh L, Subhadra KG (2001). Alkali Halides: A Handbook of Physical Properties. Berlin: Springer. ISBN 978-3-540-42180-1.
  4. ^ a b Zumdahl SS (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 978-0-618-94690-7.
  5. ^ "Compound Summary for Potassium Chloride". PubChem. U.S. National Library of Medicine. CID 4873. Retrieved 17 October 2015.
  6. ^ Chambers M. "7447-40-7 - WCUXLLCKKVVCTQ-UHFFFAOYSA-M - Potassium chloride [USP:JAN]". ChemIDplus. U.S. National Library of Medicine. Archived from the original on 15 July 2015. Retrieved 22 December 2017.
  7. ^ Rayner-Canham G (22 December 2013). Descriptive inorganic chemistry. Overton, Tina (Sixth ed.). New York, NY. ISBN 978-1-4641-2557-7. OCLC 882867766.{{cite book}}: CS1 maint: location missing publisher (link)
  8. ^ "Potassium Fertilizers (Penn State Agronomy Guide)". Penn State Agronomy Guide (Penn State Extension). Archived from the original on 2016-12-20. Retrieved 2016-12-10.
  9. ^ Watts, Henry (1883). A Dictionary of Chemistry and the Allied Branches of Other Sciences. Longmans, Green, and Company.
  10. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).

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