3-butyn-1-ol

Structural formula
General
Surname	3-butyn-1-ol
other names	3-butynol; But-3-yn-1-ol; 4-hydroxy-1-butyne; 2-hydroxyethyl acetylene;
Molecular formula	C 4 H 6 O
Brief description	colorless liquid
External identifiers / databases
EC number	213-161-9
ECHA InfoCard	100,011,966
PubChem	13566
Wikidata	Q223060
properties
Molar mass	70.09 g mol −1
Physical state	liquid
density	0.927 g cm −3
Melting point	−63 ° C
boiling point	128.9 ° C
solubility	Easily soluble in water
Refractive index	1.441 (20 ° C)
safety instructions
H and P phrases	H: 226-315-319-335
	P: 261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

3-Butyn-1-ol is a monohydric alcohol with an additional C≡C triple bond and the empirical formula C ₄ H ₆ O. It is one of three possible positional isomers .

presentation

3-Butyn-1-ol can be prepared by ethynylation. To do this, propyne is reacted with formaldehyde (using copper acetylide as a catalyst).

{\ displaystyle \ mathrm {C_ {3} H_ {4} + CH_ {2} O \ {\ xrightarrow {CuC_ {2}}} \ C_ {4} H_ {5} OH}}

properties

3-Butyn-1-ol is a highly flammable liquid (flash point: 36 ° C) with a refractive index of 1.441 (20 ° C). It is classified with level 1 (slightly water-polluting substances) in the German water hazard class.

use

3-Butyn-1-ol is the starting material for pharmaceutical syntheses and is used as a cleaning agent.

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet 3-butyn-1-ol (PDF) from Merck , accessed on September 23, 2012.
↑ ^a ^b ^c ^d ^e data sheet 3-butyn-1-ol, 97% from Sigma-Aldrich , accessed on September 23, 2012 ( PDF ).
↑ ^a ^b Entry on 3-butyn-1-ol in the ChemSpider database of the Royal Society of Chemistry , accessed on September 23, 2012.
↑ WM Haynes (Ed.): CRC handbook of chemistry and physics. A ready-reference book of chemical and physical data . founded by David R. Lide. 93rd edition. CRC Press, Boca Raton 2012, ISBN 978-1-4398-8049-4 , pp. 3–88 (English, limited preview in Google Book Search).

[Merck-1] ↑ ^a ^b ^c ^d ^e data sheet 3-butyn-1-ol (PDF) from Merck , accessed on September 23, 2012.

[Sigma-2] ↑ ^a ^b ^c ^d ^e data sheet 3-butyn-1-ol, 97% from Sigma-Aldrich , accessed on September 23, 2012 ( PDF ).

[ChemSpider-3] Entry on 3-butyn-1-ol in the ChemSpider database of the Royal Society of Chemistry , accessed on September 23, 2012.

[David_R._Lide-4] WM Haynes (Ed.): CRC handbook of chemistry and physics. A ready-reference book of chemical and physical data . founded by David R. Lide. 93rd edition. CRC Press, Boca Raton 2012, ISBN 978-1-4398-8049-4 , pp. 3–88 (English, limited preview in Google Book Search).