Ethoxyethyne

CAS NO.：927-80-0
Empirical Formula: C4H6O
Molecular Weight: 70.09
MDL number: MFCD00009247
EINECS: 213-164-5
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 05:53:25

What is Ethoxyethyne?

Chemical properties

Clear orange to brown solution

The Uses of Ethoxyethyne

Ethoxyacetylene is used in Arens-van Dorp synthesis to prepare propargyl alcohol via reaction with ketone. In organic synthesis, it undergoes [2+2] cycloaddition reactions with ketenes to give cyclobutenone derivatives. It is also used to prepare alpha, beta-unsaturated esters from ketones by following Meyer-Schuster rearrangement.Used with N-vinylamides and triflic anhydride in a direct, three-component synthesis of pyridines. Also used to prepare α, β-unsaturated esters from ketones via a Meyer-Schuster rearrangement.

The Uses of Ethoxyethyne

Used with N-vinylamides and triflic anhydride in a direct, three-component synthesis of pyridines. Also used to prepare α,β-unsaturated esters from ketones via a Meyer-Schuster rearrangement.

Properties of Ethoxyethyne

Boiling point:	53°C
Density	0.732 g/mL at 25 °C
refractive index	n20/D 1.379
Flash point:	−20 °F
storage temp.	2-8°C
color	Clear Yellow
Water Solubility	Slightly miscible with water.
BRN	741882
Dielectric constant	8.0500000000000007
Exposure limits	ACGIH: TWA 50 ppm (Skin) OSHA: TWA 500 ppm(1800 mg/m3) NIOSH: IDLH 1100 ppm; TWA 50 ppm(180 mg/m3)
CAS DataBase Reference	927-80-0(CAS DataBase Reference)
NIST Chemistry Reference	Ethoxyacetylene(927-80-0)

Safety information for Ethoxyethyne

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Exclamation Mark Irritant GHS07 Health Hazard GHS08 Environment GHS09
GHS Hazard Statements	H225:Flammable liquids H304:Aspiration hazard H315:Skin corrosion/irritation H336:Specific target organ toxicity,single exposure; Narcotic effects H361:Reproductive toxicity H373:Specific target organ toxicity, repeated exposure H411:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P202:Do not handle until all safety precautions have been read and understood. P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273:Avoid release to the environment. P331:Do NOT induce vomiting. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.