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Ethylene oxide

Ethylene oxide structure

CAS No:
75-21-8
Formula:
C2H4O
Chemical Name:
Ethylene oxide
Synonyms:
Oxirane;Ethylene oxide;Ethyleneoxy;Dihydrooxirene;Dimethylene oxide;1,2-Epoxyethane;ETO;Oxacyclopropane;Oxane;Oxidoethane;Oxirene,dihydro-;T-Gas;Oxyfume 12;Oxyfume;Epoxyethane;Ethene oxide;Ciba-Geigy 9138;12/88;Mirror Ox;Oxyfume 2002;99932-75-9;142175-32-4;19034-08-3;37341-05-2;436859-78-8;184288-32-2
Categories:
Active Pharmaceutical Ingredients > Synthetic Anti-infective Drugs

Description

Ethylene oxide is the simplest cyclic ether. It is a colorless gas or liquid and has a sweet, etheric odor. Ethylene oxide is a flammable, very reactive and explosive chemical substance. On decomposition, vapors of pure ethylene oxide mix with air or inert gases and become highly explosive. Ethylene oxide, is used in large scale as an intermediate in the production of monoethylene glycol, diethylene glycol, triethylene glycol, poly(ethylene) glycols, ethylene glycol ethers, ethanolamine, ethoxy

Ethylene oxide Basic Attributes

Molecular Weight：

44.05260

Exact Mass：

44.05

EC Number：

618-635-2

HScode：

2910100000

Characteristics

PSA：

12.53000

XLogP3：

0.01660

Appearance：

Ethylene oxide appears as a clear colorless gas with an ethereal odor with a flash point below 0°F. Liquid less dense than water. Vapors heavier than air. May polymerize exothermically if heated or contaminated. If the polymerization takes place inside a container, the container may rupture violently. Vapors very toxic. Vapors irritate the eyes, skin, and respiratory system. Prolonged skin contact may result in delayed burns. Used to make other chemicals, as a fumigant and industrial sterilant.

Density：

0.882 g/cm³ @ Temp: 10 °C

Melting Point：

-111 °C

Boiling Point：

10.7 °C @ Press: 760 Torr

Flash Point：

Below -17.7oC.

Refractive Index：

n20/D 1.3597(lit.)

Water Solubility：

Miscible

Storage Conditions：

Refrigerator

Vapor Pressure：

1095 mmHg at 20 °C

Vapor Density：

1.49

Toxicity：

LD50 oral (rat) 72 mg/kg LC50 inhal (rat) 800 ppm (1600 mg/m3) PEL (OSHA) 1 ppm (2 mg/m3) TLV-TWA (ACGIH) 1 ppm (2 mg/m3)

Flammability characteristics：

Flammable Gas

Explosive limit：

Explosive limits , vol% in air: 3-100

Odor：

Sweet

Safety Information

Hazard category：

2.3

Transport codes：

UN 2037

wgk germany：

hazard class code：

R45

safety instructions：

53-45-36/37-16-24/25-23

RTECS Number：

KX2450000

Marks：

F+; T

Storage features：

Fireproof. Cool.

Stability/Shelf Life：

STABLE IN WATER

Precautionary statement(s)：

P201-P210-P280-P308 + P313-P370 + P378-P403 + P235

Hazard Statements：

H225-H302 + H332-H315-H319-H335-H340-H350

Ethylene oxide Use and Manufacturing

1. Used as organic chemical raw material and solvent, mainly used to produce ethylene glycol, ethanolamine and non-ionic surfactant. 2. Ethylene oxide has a bactericidal effect, it does not corrode metals and has no residual odor, so it can be used as a gas sterilant for materials. Generally, ethylene oxide-carbon dioxide (the ratio of the two is 90:10) or a mixture of ethylene oxide-dichlorodifluoromethane is mainly used for disinfection of hospitals and precision instruments. Fumigants for ethylene oxide are often used for the preservation of grain and food. For example, in the storage of dried egg powder, it is often decomposed by the action of bacteria. Fumigation treatment with ethylene oxide can prevent deterioration. The chemical composition of egg powder, including amino acids, is not affected. 3. Ethylene oxide easily interacts with acids. Therefore, it can be added as an antacid in certain substances to reduce the acidity of these substances or use it for a long time without generating acidity. For example, in the production of chlorinated butyl rubber, if the solution of the copolymer of isobutylene and isoprene is added to ethylene oxide before chlorination, the finished product can be completely free of alkaline washing and water washing.

Computed Properties

Molecular Weight:44.05
XLogP3:-0.1
Hydrogen Bond Acceptor Count:1
Exact Mass:44.026214747
Monoisotopic Mass:44.026214747
Topological Polar Surface Area:12.5
Heavy Atom Count:3
Complexity:10.3
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

1,2-Dichloroethane

Ethanol

Ethane

Ethylene

Nitrogen

Oxygen

PETROLEUM ETHER

Downstream Products

2-Methoxyethanol

Diethylene glycol

2-Butoxyethanol

Diethylene glycol monoethyl ether

Dipropylene glycol monomethyl ether

Price Analysis

Make your Ethylene oxide purchase based on the price and market insights! ECHEMI provides professional market insights with prices for you to make a better choice. Learn more on Ethylene oxide prices .

Data: 2026-07-24
Price: 7000.00Yuan/mt
Change: 0

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