[A12139] CAS 536-74-3 | Phenylacetylene, 98+%

CAS : 536-74-3
UN# : UN3295
MDL : MFCD00008570
Hazard Class : 3
EINECS : 208-645-1
Packing Group : III

Other name :

Ethynylbenzene

Chemical Properties

Formula : C8H6
Formula weight : 102.14
Melting Point : -45°
Boiling Point : 142-144°
Flash point : 27°(81°F)
Density : 0.930
Refractive Index : 1.5480
Sensitivity : Light Sensitive. Ambient temperatures.
Form : Liquid
Solubility : Immiscible with water.

Literature References

Conversion to the 1-bromoalkyne has been described: Org. Synth. Coll., 5, 921 (1973). For an improved phase-transfer method, using NaBr/NaOCl, see: J. Org. Chem., 57, 4555 (1992). For cyanation with CuCN in the presence of TMS chloride and NaI, see: Tetrahedron Lett., 34, 591 (1993). Glaser oxidative coupling by Cu(OAc)2 in pyridine gives diphenylbuta-1,3-diyne: Org. Synth. Coll., 5, 499 (1973). For conversion to the Grignard with ethylmagnesium bromide, and subsequent Cu-catalyzed coupling with allyl bromide, see: Org. Synth. Coll., 6, 925 (1988). For preparation of the cuprate and references for coupling with aryl halides to give diarylacetylenes, see: Org. Synth. Coll., 6, 916 (1988). Dimetallation can be accomplished with a 2:1 molar mixture of n-BuLi and KO-t-Bu in THF, the second metallation occurring specifically at the ortho-position. Thus, the bis(TMS)-derivative can be prepared in excellent yield: J. Org. Chem., 55, 1311 (1990).

Notes

Store in cool place. Moisture sensitive. Keep the container tightly closed in a dry and well-ventilated place. Incompatible with acids, halogens, alkali metals and oxidizing agents.Other References:Beilstein: 605461Merck: 14,3861UN#: UN3295

Grade Specifications

Grade Specifications

Hazard Statements : H304-H226-H319-H335May be fatal if swallowed and enters airways.Flammable liquid and vapour.Causes serious eye irritation.May cause respiratory irritation.
Precautionary Statements : P261-P280f-P305+P351+P338-P301+P330+P331-P315Avoid breathing dust/fume/gas/mist/vapours/spray.Wear protective clothing.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.Get immediate medical advice/attention.