Difference between revisions of "Stearic acid"

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== Description ==
 
== Description ==
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[[[SliderGallery rightalign|Stearic acid (identified by GC MS).TIF~FTIR (MFA)|stearic acid.jpg~Chemical structure]]]
 
White, waxy fatty acid. Stearic acid occurs naturally in animal fats, [[tallow|tallow]], and, to a smaller extent, vegetable fats. Lard and tallow can contain up to 30% stearic acid. Stearic acid is a long-chain saturated triglyceride with no double bonds that can be readily saponified with alkaline salts. Most commercial stearic acid products, such as U.S.P. stearic acid, contain are a mixture of 50% stearic acid, 45% [[palmitic%20acid|palmitic acid]], and 5% [[oleic%20acid|oleic acid]]. Stearic acid is used as a lubricatant, softener, and dispersing agent in soaps, candles, lubricants, ointments, cosmetics, rubber, polishes, coatings, and food packaging.
 
White, waxy fatty acid. Stearic acid occurs naturally in animal fats, [[tallow|tallow]], and, to a smaller extent, vegetable fats. Lard and tallow can contain up to 30% stearic acid. Stearic acid is a long-chain saturated triglyceride with no double bonds that can be readily saponified with alkaline salts. Most commercial stearic acid products, such as U.S.P. stearic acid, contain are a mixture of 50% stearic acid, 45% [[palmitic%20acid|palmitic acid]], and 5% [[oleic%20acid|oleic acid]]. Stearic acid is used as a lubricatant, softener, and dispersing agent in soaps, candles, lubricants, ointments, cosmetics, rubber, polishes, coatings, and food packaging.
  
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n-octadecanoic acid (IUPAC); Emersol 132; Promulsin; Proviscol Wax. U.S.P. stearic acid; kyselina stearová (Ces.); Stearinsäure (Deut.); ácido esteárico (Esp.); acide stéarique (Fr.); (It.); stearinezuur (Ned.); kwas stearynowy (Pol.);
 
n-octadecanoic acid (IUPAC); Emersol 132; Promulsin; Proviscol Wax. U.S.P. stearic acid; kyselina stearová (Ces.); Stearinsäure (Deut.); ácido esteárico (Esp.); acide stéarique (Fr.); (It.); stearinezuur (Ned.); kwas stearynowy (Pol.);
  
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[[[SliderGallery rightalign|MFA- Stearic acid.jpg~FTIR|aaiSTEARIC.jpg~FTIR|stearic acid.jpg~Chemical structure]]]
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== Risks ==
  
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== Other Properties ==
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* Combustible. 
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* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC174490010&productDescription=STEARIC+ACID%2C+97%2B%25%28GC%29+1KG&vendorId=VN00032119&countryCode=US&language=en SDS]
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== Physical and Chemical Properties ==
  
 
Almost insoluble in water.
 
Almost insoluble in water.
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|-
 
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! scope="row"| Melting Point
 
! scope="row"| Melting Point
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| 69.6
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| 69.6 C
 
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! scope="row"| Density
 
! scope="row"| Density
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| 0.8390
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| 0.8390 g/ml
 
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! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
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! scope="row"| Boiling Point
 
! scope="row"| Boiling Point
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| 361-383
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| 361-383 C
 
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|}
  
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== Hazards and Safety ==
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==Resources and Citations==
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Combustible. 
 
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LINK: [http://www.cdc.gov/niosh/ipcsneng/neng0568.html International Chemical Safety Card]
 
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== Sources Checked for Data in Record ==
 
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 770
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 770
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* ''A Glossary of Paper Conservation Terms'', Margaret Ellis (ed.), Conservation Center of the Institute of Fine Arts, New York City, 1998
 
* ''A Glossary of Paper Conservation Terms'', Margaret Ellis (ed.), Conservation Center of the Institute of Fine Arts, New York City, 1998
  
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "stearic acid" Encyclopædia Britannica Premium Service. [Accessed 25 Jan. 2006].
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "stearic acid" [Accessed 25 Jan. 2006].
  
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* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Stearic_acid (Accessed Feb. 10, 2006)
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* Wikipedia: http://en.wikipedia.org/wiki/Stearic_acid (Accessed Feb. 10, 2006)
  
 
* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
 
* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997

Latest revision as of 14:20, 4 June 2022

Description

FTIR (MFA)

Stearic acid (identified by GC MS).TIF

Chemical structure

Stearic acid.jpg

White, waxy fatty acid. Stearic acid occurs naturally in animal fats, Tallow, and, to a smaller extent, vegetable fats. Lard and tallow can contain up to 30% stearic acid. Stearic acid is a long-chain saturated triglyceride with no double bonds that can be readily saponified with alkaline salts. Most commercial stearic acid products, such as U.S.P. stearic acid, contain are a mixture of 50% stearic acid, 45% Palmitic acid, and 5% Oleic acid. Stearic acid is used as a lubricatant, softener, and dispersing agent in soaps, candles, lubricants, ointments, cosmetics, rubber, polishes, coatings, and food packaging.

Synonyms and Related Terms

n-octadecanoic acid (IUPAC); Emersol 132; Promulsin; Proviscol Wax. U.S.P. stearic acid; kyselina stearová (Ces.); Stearinsäure (Deut.); ácido esteárico (Esp.); acide stéarique (Fr.); (It.); stearinezuur (Ned.); kwas stearynowy (Pol.);

Risks

  • Combustible.
  • ThermoFisher: SDS

Physical and Chemical Properties

Almost insoluble in water.

Composition CH3(CH2)16COOH
CAS 57-11-4
Melting Point 69.6 C
Density 0.8390 g/ml
Molecular Weight mol. wt. = 284.47
Refractive Index 1.4299
Boiling Point 361-383 C

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 770
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8959
  • A Glossary of Paper Conservation Terms, Margaret Ellis (ed.), Conservation Center of the Institute of Fine Arts, New York City, 1998
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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