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Propargyl alcohol

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Propargyl alcohol
Names
IUPAC name
Prop-2-yn-1-ol
Other names
propynol, 2-propynol, 2-propyn-1-ol, prop-2-yn-1-ol, hydroxymethylacetylene.
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.003.157 Edit this at Wikidata
KEGG
UNII
  • InChI=1S/C3H4O/c1-2-3-4/h1,4H,3H2 checkY
    Key: TVDSBUOJIPERQY-UHFFFAOYSA-N checkY
  • InChI=1/C3H4O/c1-2-3-4/h1,4H,3H2
    Key: TVDSBUOJIPERQY-UHFFFAOYAE
  • C#CCO
Properties
C3H4O
Molar mass 56.064 g·mol−1
Appearance Colorless to straw-colored liquid[1]
Odor geranium-like[1]
Density 0.9715 g/cm3
Melting point −51 to −48 °C (−60 to −54 °F; 222 to 225 K)
Boiling point 114 to 115 °C (237 to 239 °F; 387 to 388 K)
miscible[1]
Vapor pressure 12 mmHg (20 °C)[1]
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazards (white): no code
3
3
3
Flash point 36 °C; 97 °F; 309 K (open cup)[1]
NIOSH (US health exposure limits):
PEL (Permissible)
 none[1]
REL (Recommended)
 TWA 1 ppm (2 mg/m3) [skin][1]
IDLH (Immediate danger)
 N.D.[1]
Safety data sheet (SDS) External SDS
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 ?)
File:Propargyl-alcohol.gif
Propargyl-alcohol

Propargyl alcohol, or 2-propyn-1-ol, is an organic compound with the formula C3H4O. It is the simplest stable alcohol containing an alkyne functional group.[2] Propargyl alcohol is a colorless viscous liquid that is miscible with water and most polar organic solvents.

Reactions and applications

Propargyl alcohol polymerizes with heating or treatment with base. It is used as a corrosion inhibitor, a metal complex solution, a solvent stabilizer and an electroplating brightener additive. It is also used as an intermediate in organic synthesis. Secondary and tertiary substituted propargylic alcohols undergo catalyzed rearrangement reactions to form α,β-unsaturated carbonyl compounds via the Meyer–Schuster rearrangement and others. It can be oxidized to propynal[3] or propargylic acid.

Preparation

Propargyl alcohol is produced by the copper-catalysed addition of formaldehyde to acetylene as a by-product of the industrial synthesis of but-2-yne-1,4-diol.[4] It can also be prepared by dehydrochlorination of 3-chloro-2-propen-1-ol by NaOH.[5]

Safety

Propargyl alcohol is a flammable liquid, toxic by inhalation, highly toxic by ingestion, toxic by skin absorption, and corrosive.

See also

References

  1. ^ a b c d e f g h NIOSH Pocket Guide to Chemical Hazards. "#0527". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Merck Index, 11th Edition, 7819
  3. ^ J. C. Sauer (1956). "Propionaldehyde". Organic Syntheses. 36: 66; Collected Volumes, vol. 4, p. 813.
  4. ^ Falbe, Jürgen; Bahrmann, Helmut; Lipps, Wolfgang; Mayer, Dieter. "Alcohols, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a01_279. ISBN 978-3527306732..
  5. ^ [1] J. Am. Chem. Soc., 1944, 66 (2), pp 285–287
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