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Ethylene oxide CAS#75-21-8

Basic Information

Basic Information

CAS No.: 75-21-8
Molecular Formula: C2H4O
Molecular weight: 44.05

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Product Details

Ethylene oxide CAS#75-21-8

Ethylene oxide, also known as oxirane, is the simplest cyclic ether. At room temperature, it is a colorless, flammable gas that condenses into a colorless, highly mobile liquid at temperatures below 10.7°C. It has an odor similar to diethyl ether and is miscible with water, ethanol, and diethyl ether.

As an important raw material in the fine chemical industry, ethylene oxide is used to produce a wide range of compounds, including ethylene glycol, non-ionic surfactants, ethanolamines, and glycol ethers. These derivatives are further utilized in the manufacture of thousands of products, such as synthetic detergents, emulsifiers, antifreeze agents, plasticizers, lubricants, insecticides, and fumigants, highlighting the compound's extensive industrial applications.

In addition, ethylene oxide is a highly effective, broad-spectrum gaseous sterilizing and disinfecting agent. Its strong penetrating ability enables it to reach deep into materials and eliminate various pathogenic microorganisms, including vegetative bacteria, bacterial spores, viruses, and fungi.


Ethylene oxide Chemical Properties

English NameEthylene oxide
English SynonymsETHYLENE OXIDE, 99.5+%;ETHYLENE OXIDE CYLINDER WITH 2 L (NET ~1.5 KG);ETHYLENE OXIDE, 1X1ML, MEOH, 5000OUG/ML;ETHYLENE OXIDE 1X1ML, CH2CL2, 2000UG/ML;ETHYLENE OXIDE, CYLINDER WITH 27 L (NET ~20 KG);ETHYLENE OXIDE, 1X1ML, CH2CL2, 50000UG/M LETHYLENE OXIDE, PRESSURE TIN WITH 2 50 ML (NET ~225 G);etylenutlenek(polish)
CAS Number75-21-8
Molecular FormulaC2H40
Molecular Weight44.05
EINECS Number200-849-9
Melting point-111 °C(lit.)
Boiling point10.7 °C(lit.)
Density0.882 g/mL at 25 °C(lit.)
Vapor pressure1095 mmHg at 20 °C
Refractive indexn20/D 1.3597(lit.)
Flash point<-17.7℃
Storage conditions2-8°℃
Physical formcolorless gas
ColorColorless
OdorCapable of detecting sweetness at concentrations ranging from 257 to 690 ppm
Specific heat capacityCp(liquid): 2 J/(g-K); Cp(gas): 1.09 J/(g-K), at 25℃
Merck3802
BRN102378
Henry's Law constant5.8x10-2 mol/(m3Pa) at 25°C, Conway et al. (1983)
Exposure limitsACGIH TLV-TWA:1 ppm (1.8 mg/m3)
NIOSH REL-TWA:< 0.1 ppm;REL-Ceiling:5 ppm [10-min/day]
Dielectric constant14.0(-4℃)
Main applicationsAgriculture
Cleaning Products
Cosmetics
Food and Beverage
Personal Care
InChI1S/C2H4O/c1-2-3-1/h1-2H2
InChIKeyIAYPIBMASNFSPL-UHFFFAOYSA-N
SMILESC1Co1
LogP-0.3


Product Application of Ethylene oxide CAS#75-21-8

Ethylene oxide is an important raw material in the fine chemical industry and is used to produce a broad range of fine chemical compounds, including ethylene glycol, non-ionic surfactants, ethanolamines, and ethylene glycol ethers. These derivatives serve as intermediates for thousands of downstream products, such as synthetic detergents, emulsifiers, antifreeze agents, plasticizers, lubricants, insecticides, and fumigants, demonstrating the compound's extensive range of applications.

In the cosmetics industry, ethylene oxide is used as a consistency regulator in the manufacture of creams, toothpaste, and shaving creams. In the pharmaceutical sector, it serves as a base material for ointments, lotions, and suppositories. Within the rubber industry, it functions as a lubricant and dispersing agent, while in synthetic fiber production, it can be used as a polymerization monomer for dyeable polyester.

Ethylene oxide is also widely applied in medical and industrial sterilization. It is commonly used as a gaseous fumigant to sterilize items that are unsuitable for other treatment methods, particularly heat-sensitive materials. These include leather, cotton products, synthetic fabrics, precision instruments, biological products, paper, books, documents, certain pharmaceuticals, and rubber products.


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