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Sigma-Aldrich

5-Hexynoic acid

97%

Synonym(s):

4-Ethynylbutyric acid, 5-Hexyn-1-oic acid

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About This Item

Linear Formula:
CH≡C(CH2)3CO2H
CAS Number:
53293-00-8
Molecular Weight:
112.13
Beilstein/REAXYS Number:
1743192
MDL number:
MFCD00066346
UNSPSC Code:
12352100
PubChem Substance ID:
24878284
NACRES:
NA.22

Quality Level

100

assay

97%

refractive index

n20/D 1.449 (lit.)

bp

224-225 °C (lit.)

density

1.016 g/mL at 25 °C (lit.)

SMILES string

OC(=O)CCCC#C

InChI

1S/C6H8O2/c1-2-3-4-5-6(7)8/h1H,3-5H2,(H,7,8)

InChI key

VPFMEXRVUOPYRG-UHFFFAOYSA-N

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General description

5-Hexynoic acid is an alkynoic acid. It undergoes gold-catalyzed cyclization to form the corresponding methylene lactones.

Application

5-Hexynoic acid may be used in the preparation of:
  • 5-hexynoic acid methyl ester
  • 5,6-dicarba-closo-dodecaboranyl hexynoic acid
  • 5,8,11-dodecatriynoic acid
  • 5-isocyanato-1-pentyne

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

230.0 °F - closed cup

flash_point_c

110 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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