Strontium stearate

Strontium stearate
Names
Other names
strontium distearate, strontium dioctadecanoate[1][2]
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/2C18H36O2.Sr/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2
    Key: FRKHZXHEZFADLA-UHFFFAOYSA-L
  • CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Sr+2]
Properties
Sr(C18H35O2)2
Molar mass 654.56
Appearance white powder
Density 1.11 g/cm3
Melting point 130–140 °C (266–284 °F; 403–413 K)
insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Strontium stearate is a metal-organic compound, a salt of strontium and stearic acid with the chemical formula Sr(C18H35O2)2.[3] The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.[4]

Synthesis

A reaction of strontium hydroxide with stearic acid.[5]

Physical properties

The compound forms white powder. Insoluble in alcohol, soluble (forms gel) in aliphatic and aromatic hydrocarbons.[6]

Uses

Strontium stearate is used in grease and wax compounding.[6][7]

It is also used as a lubricant to improve the flow characteristics of polyolefin resins.[8]

References

  1. ^ "CAS 10196-69-7 Strontium stearate - Alfa Chemistry". alfa-chemistry.com. Retrieved 28 February 2023.
  2. ^ "Strontium Stearate - CAS No. 10196-69-7 - World Metal, Stafford TX". worldmetalllc.com. Retrieved 28 February 2023.
  3. ^ "STRONTIUM STEARATE - Optional[FTIR] - Spectrum - SpectraBase". spectrabase.com. Retrieved 28 February 2023.
  4. ^ "Stearic acid, strontium salt". National Institute of Standards and Technology. 17 October 2019. Retrieved 28 February 2023.
  5. ^ Schreck, Albert E.; Arundale, Joseph C. (1959). Strontium: A Materials Survey. U.S. Government Printing Office. p. 27. Retrieved 28 February 2023.
  6. ^ a b Lewis, Robert A. (1 April 2016). Hawley's Condensed Chemical Dictionary. John Wiley & Sons. p. 1281. ISBN 978-1-119-26784-3. Retrieved 28 February 2023.
  7. ^ Modern Technology of Petroleum, Greases, Lubricants & Petro Chemicals (Lubricating Oils, Cutting Oil, Additives, Refining, Bitumen, Waxes with Process and Formulations) 3rd Revised Edition. NIIR Project Consultancy Services. 3 April 2018. p. 177. ISBN 978-93-81039-61-8. Retrieved 28 February 2023.{{cite book}}: CS1 maint: location missing publisher (link)
  8. ^ Flick, Ernest W. (22 October 2013). Plastics Additives, Volume 2. William Andrew. p. 206. ISBN 978-0-8155-1863-1. Retrieved 28 February 2023.


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