Ethylene, refrigerated liquid

  • Ethene
  • Elayl
  • Ethylene, cryogenic fluid
  • Etherin
  • ETL
Formula
CH2=CH2
Structure
Description
Colorless gas with a sweet odor and taste at normal temperatures and pressures.
Uses
Oxyethylene welding & cutting metals, manufacture mustard gas, plant growth regulator and many other organics, medication: inhalation anesthetic.

Registry Numbers and Inventories.
CAS
74-85-1
EC (EINECS/ELINCS)
200-815-3
EC Index Number
601-010-00-3
EC Class
Extremely flammable
S 9 16 33
RTECS
KU5340000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen
UN (DOT)
1038
Merck
12,3837
Beilstein/Gmelin
1730731
Beilstein Reference
4-01-00-00677
EPA OPP
41901
Swiss Giftliste 1
G-1172
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H4
Formula mass
28.05
Melting point, °C
-169.1
Boiling point, °C
-103.7
Vapor pressure, mmHg
36213 (7.4 C)
Vapor density (air=1)
0.98
Odor Threshold Odor threshold 260 ppm
Critical temperature
9.9
Critical pressure
50.7
Density
0.386 g/cm3 (3 C)
Solubility in water
Insoluble
Viscosity
0.0067 cp 20C
Surface tension
18.1 g/s2 (-112 C)
Refractive index
1.363 (-100 C)
Dipole moment
0.1 D (25 C)
Dielectric constant
1 (0 C)
Partition coefficient, pKow
1.13
Thermal expansion
0.0026/K at -100 C
Heat of fusion
3.35 kJ/mol
Heat of vaporization
13.9 kJ/mol
Heat of combustion
-1412 kJ/mol

Hazards and Protection.
Storage
Protect against physical damage. Isolate from oxygen chlorine, combustible, organic and oxidizing materials. Store at in cool, well-ventilated area of non-combustible construction, away from possible sources of ignition.
A B1
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Splash-proof suit, gloves, boots and goggles. Decontamination showers and eye fountains to be available on deck in suitabaly marked and convenient locations.
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
Reactive at high temperature or pressure. Forms flammable mix with air over a wide range. Spontaneously explosive in sunlight with chlorine. Can react vigorously with oxidizing materials.
Incompatibilities
Chlorine, fluorine and other strong oxidizing agents.
Decomposition
The substance may polymerize to form aromatic compounds under the influence of temperatures above 600 C.

Fire.
Flash Point,°C
-136
Autoignition, °C
450
Upper exp. limit, %
36
Lower exp. limit, %
2.7
Fire fighting
Wear full bunker gear, including a positive pressure self-contained breathing apparatus. Extinguish with agents approved for Class B hazards (e.g., dry chemical, carbon dioxide, foam, steam) or water fog.
Fire potential
Extremely flammable cryogenic liquid.
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. Ruptured cylinders may rocket.
Combustion products
Incomplete burning can produce carbon monoxide and/or carbon dioxide and other harmful products.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: 1000ppm (a simple ashyxiant) (ACGIH 1995-1996).
Poison_Class
5
Exposure effects
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
   Ingestion
Ingestion of liquid can cause burns similar to frostbite.
   Inhalation
Inhalation causes chemical asphyxiation. Inhalation causes headaches, dizziness, drowsiness, and nausea, and may lead to unconsciousness.
   Skin
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
   Eyes
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Administer 100% humidified supplemental oxygen with assisted ventilation as required. If hypoxia has been severe or prolonged, carefully evaluate for neurologic sequelae and provide supportive treatment as indicated.
   Skin
Rewarming and a variety of topical treatments are indicated for frostbite injury. See main section for more information.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1038
Response guide
Hazard class
2.1
USCG CHRIS Code
ETL
 
Std. Transport #
4905735
 
IMO Gas Code
B