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503-17-3 - 2-Butyne, 98% - Dimethylacetylene - A13823 - Alfa Aesar

A13823 2-Butyne, 98%

CAS Number
503-17-3
Synonyms
Dimethylacetylene

Size Price ($) Quantity Availability
5g 47.28
25g 162.90
100g 528.00
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2-Butyne, 98%

MDL
MFCD00009275
EINECS
207-962-2

Chemical Properties

Formula
CH3C≡CCH3
Formula Weight
54.09
Melting point
-32°
Boiling Point
24-27°
Flash Point
-49°(-56°F)
Density
0.690
Refractive Index
1.3920
Solubility
Not miscible in water.

Applications

2-Butyne is used to synthesize alkylated hydroquinones in the total synthesis of Vitamin E. It is also used as pharmaceutical intermediates.

Notes

Avoid extremes of temperature and direct sunlight. Heat-sensitive. Avoid contact with oxidizing materials. Incompatible with Halogens. Chlorinated solvents.

Literature References

Dongmin Shen; Lovat V.C Rees. Adsorption and diffusion of n-butane and 2-butyne in silicalite-I. Zeolites.1991, 11 684-689.

Kevin C. Wallace; Andy H. Liu; William M. Davis; Richard R. Schrock. Living polymerization of 2-butyne using a well-characterized tantalum catalyst.Organometallics.1989, 8 (3), 644-654.

With AlCl3, dimerizes to give the complex of the otherwise unstable tetramethylcyclobutadiene, cycloaddition of which with dimethyl acetylenedicarboxylate gives a Dewar benzene: Synthesis, 139 (1971):

With a catalytic amount of AlCl3, hexamethyl Dewar benzene can be produced directly, with the 2-butyne also acting as the dienophile component: Org. Synth. Coll., 7, 256 (1990).

Reacts with chlorine to give 3,4-dichloro,1,2,3,4-tetramethylcyclobutene, a precursor of various cyclobutadienyl complexes: Org. Synth. Coll., 5, 370 (1973).

For use in formation of a Zr metallocycle as an intermediate in the formation of phospholes and analogous heterocycles, see Bis(cyclopentadienyl)­zirconium dichloride, 12548.

GHS Hazard and Precautionary Statements

Hazard Statements: H224-H315-H319-H335

Extremely flammable liquid and vapour. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P210-P261-P280-P240-P303+P361+P353-P305+P351+P338-P304+P340-P362-P405-P501a

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. Ground/bond container and receiving equipment. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Beilstein
1361340
Hazard Class
3
Packing Group
I
Harmonized Tariff Code
2901.29
TSCA
Yes

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