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Potassium stearate

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Potassium stearate
Names
Other names Potassium octadecanoate
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.898 Edit this at Wikidata
EC Number
  • 209-786-1
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C18H36O2.K/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);/q;+1/p-1Key: ANBFRLKBEIFNQU-UHFFFAOYSA-M
SMILES
  • CCCCCCCCCCCCCCCCCC(=O).
Properties
Chemical formula C
18H
35KO
2
Molar mass 322.56
Appearance colorless crystals
Density 1.12 g/cm
Boiling point 359.4 °C (678.9 °F; 632.5 K)
Solubility in water soluble in hot water
Hazards
GHS labelling:
Pictograms GHS07: Exclamation markGHS09: Environmental hazard
Signal word Warning
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Potassium stearate is a metal-organic compound, a salt of potassium and stearic acid with the chemical formula C
18H
35KO
2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Synthesis

Potassium stearate may be prepared by saturating a hot alcoholic solution of stearic acid with alcoholic potash.

Physical properties

The compound forms colorless crystals.

Slightly soluble in cold water, soluble in hot water, ethanol, insoluble in ether, chloroform, carbon disulfide. A component of liquid soap.

Uses

The compound is primarily used as an emulsifier in cosmetics and in food products. It is also used as a cleansing ingredient and lubricant.

Hazards

Causes skin irritation and serious eye irritation.

References

  1. "potassium stearate". paulaschoice-eu.com. Retrieved 7 March 2023.
  2. "Potassium Stearate". Cosmetics Info. Retrieved 7 March 2023.
  3. Allen, Alfred Henry (1886). Commercial Organic Analysis: Being a Treatise on the Properties, Proximate Analytical Examination, and Modes of Assaying the Various Organic Chemicals and Preparations Employed in the Arts, Manufactures, Medicine, &c. With Concise Methods for the Detection and Determination of Their Impurities, Adulterations, and Products of Decomposition. ... P. Biakiston & Son. p. 230. Retrieved 7 March 2023.
  4. "Potassium Stearate". Silver Fern Chemical Inc. Retrieved 7 March 2023.
  5. "Potassium Stearate OPK-1000". Hallstar BPC. Retrieved 7 March 2023.
  6. "potassium stearate | Paula's Choice". Paula's Choice. Retrieved 7 March 2023.
  7. "Potassium Stearate". American Elements. Retrieved 7 March 2023.
Potassium compounds
H, (pseudo)halogens
chalcogens
pnictogens
B, C group
transition metals
organic
Salts and covalent derivatives of the stearate ion
HCH3(CH2)16CO2 He
LiCH3(CH2)16CO2 Be(CH3(CH2)16CO2)2 B(CH3(CH2)16CO2)3 C NH4CH3(CH2)16CO2, -O- F Ne
NaCH3(CH2)16CO2 Mg(CH3(CH2)16CO2)2 Al(CH3(CH2)16CO2)3 Si(CH3(CH2)16CO2)4 P(CH3(CH2)16CO2)3 S Cl Ar
KCH3(CH2)16CO2 Ca(CH3(CH2)16CO2)2 Sc(CH3(CH2)16CO2)3 Ti V Cr(CH3(CH2)16CO2)2 Mn Fe(CH3(CH2)16CO2)2
Fe(CH3(CH2)16CO2)3 		Co(CH3(CH2)16CO2)2 Ni(CH3(CH2)16CO2)2 Cu(CH3(CH2)16CO2)2 Zn(CH3(CH2)16CO2)2 Ga(CH3(CH2)16CO2)3 Ge As(CH3(CH2)16CO2)3 Se Br Kr
RbCH3(CH2)16CO2 Sr(CH3(CH2)16CO2)2 Y(CH3(CH2)16CO2)3 Zr(CH3(CH2)16CO2)3 Nb Mo Tc Ru Rh Pd(CH3(CH2)16CO2)2 AgCH3(CH2)16CO2 Cd(CH3(CH2)16CO2)2 In(CH3(CH2)16CO2)3 Sn Sb(CH3(CH2)16CO2)3 Te I Xe
CsCH3(CH2)16CO2 Ba(CH3(CH2)16CO2)2 * Lu(CH3(CH2)16CO2)3 Hf Ta W Re Os Ir Pt AuCH3(CH2)16CO2 Hg2(CH3(CH2)16CO2)2,
Hg(CH3(CH2)16CO2)2 		TlCH3(CH2)16CO2 Pb(CH3(CH2)16CO2)2 Bi(CH3(CH2)16CO2)3 Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La(CH3(CH2)16CO2)3 Ce(CH3(CH2)16CO2)3 Pr Nd Pm Sm(CH3(CH2)16CO2)3 Eu(CH3(CH2)16CO2)3 Gd(CH3(CH2)16CO2)3 Tb Dy(CH3(CH2)16CO2)3 Ho(CH3(CH2)16CO2)3 Er Tm Yb(CH3(CH2)16CO2)3
** Ac(CH3(CH2)16CO2)3 Th(CH3(CH2)16CO2)4 Pa UO2(CH3(CH2)16CO2)2 Np Pu Am Cm Bk Cf Es Fm Md No
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