Ethylacetylene

  • Ethylacetylene, inhibited
  • 1-Butyne
  • But-1-yne
Formula
C4H6
Structure
Description
A colorless gas with a garlic odor.
Uses
Used as a fuel and to produce other chemicals.

Registry Numbers and Inventories.
CAS
107-00-6
EC (EINECS/ELINCS)
203-451-3
RTECS
ER9553000
UN (DOT)
2452
Beilstein/Gmelin
1304439
Beilstein Reference
4-01-00-00969
Swiss Giftliste 1
G-8044
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C4H6
Formula mass
54.09
Melting point, °C
-130
Boiling point, °C
8
Vapor pressure, mmHg
1390 (25 C)
Vapor density (air=1)
1.93
Critical temperature
190.5
Critical pressure
47
Density
0.669 g/cm3 (0 C)
Solubility in water
Insoluble
Viscosity
0.00727 cp
Surface tension
23.62 g/s2 (-32 C)
Refractive index
1.3962 (20 C)
Partition coefficient, pKow
1.53
Heat of vaporization
25.1 kJ/mol
Heat of combustion
-2598 kJ/mol

Hazards and Protection.
Storage
Keep separated from incompatible substances.
Handling
Handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding required.
Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
Polymerizes easily.
Incompatibilities
May react vigorously with strong oxidizing agents May react exothermically with reducing agents to release hydrogen gas.
Decomposition
Thermal decomposition products: oxides of carbon.

Fire.
Flash Point,°C
-66
Upper exp. limit, %
32.9
Lower exp. limit, %
2
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. May ignite spontaneously in air.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated.
Combustion products
Fire may produce irritating and/or toxic gases.
Health
1
 
Flammability
4
 
 
Reactivity
3
 

Health.
Poison_Class
3
Exposure effects
Stimulants such as epinephrine may induce ventricular fibrillation.
   Ingestion
No information of adverse effects.
   Inhalation
Nausea, vomiting, symptoms of drunkenness, suffocation, convulsions, coma.
   Skin
See inhalation.
   Eyes
May cause irritation.

First aid
 
   Ingestion
If adverse effects occur, remove to uncontaminated area. Give artificial respiration if not breathing. If breathing is difficult, oxygen should be administered by qualified personnel. Get immediate medical attention.
   Inhalation
Vapors may cause dizziness or asphyxiation without warning. May be toxic if inhaled at high concentrations.
   Skin
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
2452
Response guide
Hazard class
2.1
Std. Transport #
4905736