Sorbic acid

Not to be confused with Ascorbic acid.
Sorbic acid
Sorbic acid
Sorbic acid (ball-and-stick model)
Names
Preferred IUPAC name
(2E,4E)-Hexa-2,4-dienoic acid
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.427 Edit this at Wikidata
E number E200 (preservatives)
UNII
  • InChI=1S/C6H8O2/c1-2-3-4-5-6(7)8/h2-5H,1H3,(H,7,8)/b3-2+,5-4+ checkY
    Key: WSWCOQWTEOXDQX-MQQKCMAXSA-N checkY
  • InChI=1/C6H8O2/c1-2-3-4-5-6(7)8/h2-5H,1H3,(H,7,8)/b3-2+,5-4+
    Key: WSWCOQWTEOXDQX-MQQKCMAXBN
  • O=C(O)\C=C\C=C\C
Properties
C6H8O2
Molar mass 112.128 g·mol−1
Density 1.204 g/cm3
Melting point 135 °C (275 °F; 408 K)
Boiling point 228 °C (442 °F; 501 K)
1.6 g/L at 20 °C
Acidity (pKa) 4.76 at 25 °C
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
1
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Sorbic acid, or 2,4-hexadienoic acid, is a natural organic compound used as a food preservative. It has the chemical formula CH3(CH)4CO2H and the structure H3C−CH=CH−CH=CH−C(=O)OH. It is a colourless solid that is slightly soluble in water and sublimes readily. It was first isolated from the unripe berries of the Sorbus aucuparia (rowan tree), hence its name.[1]

  1. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).