Products Description of ETHYLENE OXIDE CAS#75-21-8
Ethylene oxide, also known as oxirane, is one of the simplest cyclic ether compounds. At room temperature, it exists as a colorless, flammable gas, while at temperatures below 10.7°C, it becomes a colorless, highly mobile liquid. It is readily miscible with water, ethanol, alcohol, and diethyl ether.
As an important fine chemical raw material, ethylene oxide is used to produce a wide range of downstream products, including ethylene glycol, nonionic surfactants, ethanolamine, and ethylene glycol ethers. Furthermore, it serves as a key intermediate in the manufacture of thousands of products, such as synthetic detergents, emulsifiers, antifreeze agents, plasticizers, lubricants, pesticides, and fumigants, demonstrating a broad scope of industrial application.
Chemical Properties
| English Name | ETHYLENE OXIDE |
| English Synonyms | ETHYLENE OXIDE, 99.5+%6ETHYLENE OXIDE CYLINDER WITH 2 L (NET -1.5 KG)ETHYLENE OXIDE, 1XIML, MEOH, 50000UG/MLETHYLENE OXIDE 1XIML, CH2CL2, 2000UG/MLETHYLENE 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 Number | 75-21-8 |
| Molecular Formula | C2H40 |
| Molecular Weight | 44.05 |
| EINECS Number | 200-849-9 |
| Melting point | -111 °C(lit.) |
| Boiling point | 10.7 °C(lit.) |
| Density | 0.882 g/mL at 25 °C(lit.) |
| Vapor pressure | 1095 mmHg at 20 °C |
| Refractive index | n20/D 1.3597(lit.) |
| Flash point | <-17.7℃ |
| Storage conditions | 2-8℃ |
| Form | Colorless gas |
| Odor (Odor) | Detectable sweet taste from 257 to 690 ppm |
| Specific heat capacity | Cp(liquid): 2 J/(g-K); Cp(gas): 1.09 J/(g-K), at 25℃ |
| Merck | 3802 |
| BRN | 102378 |
| Henry's Law Constant | 5.8x10-2 mol/(m3Pa) at 25°℃, Conway et al. (1983) |
| Exposure Limits | ACGIH TLV-TWA:1 ppm (1.8 mg/m3) NIOSH REL-TWA:< 0.1 ppm;REL-Ceiling:5 ppm [10-min/day] |
| Dielectric Constant | 14.0 (-4℃) |
| Main Applications | Agriculture Cleaning Products Cosmetics Food and Beverages Personal Care |
| InChI | 1S/C2H4O/c1-2-3-1/h1-2H2 |
| InChIKey | IAYPIBMASNFSPL-UHFFFAOYSA-N |
| SMILES | C1CO1 |
| LogP | -0.3 |
Product Application of ETHYLENE OXIDE CAS#75-21-8
Due to its versatile properties, ethylene oxide is widely used across various industries. In the cosmetics sector, it serves as a consistency regulator in the production of creams, toothpaste, and shaving cream. In pharmaceutical applications, it acts as a foundational raw material for the manufacture of ointments, lotions, and suppositories. In the rubber industry, ethylene oxide functions as a lubricant and dispersing agent, while in the chemical fiber industry, it is used as a monomer to produce dyeable polyester.
Furthermore, ethylene oxide plays a significant role in military equipment, medical disinfection, and industrial sterilization. It is frequently employed for the fumigation and sterilization of heat-sensitive materials that cannot be processed via conventional methods—including food, textiles, leather, cotton goods, synthetic fabrics, precision instruments, biological products, paper, books, documents, certain pharmaceuticals, and rubber products.
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