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Ethylene Oxide cas no 75-21-8

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CAS No.:

75-21-8

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

ISO tank

Price valid (until):

2027-02-28

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Suqian City Hengliyuan Import and Export Trade Co., LTD

Company Type:

Trader

Location:

China

Payment Terms:

TT against B/L draft before shipment,100% TT in advance

Average Lead Time:

30 days

Qualification:

Main Products:

Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

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Product Description
Seller Information
Inquiry History

Description

Company Profile ----------
Suqian City Hengliyuan Import and Export Trade Co., LTD is a trading company. The company has introduced advanced scientific and technological achievements from home and abroad, and has superior products from well-known manufacturers at home and abroad. The basic functions are:
1. Domestic trade of various chemical raw materials;
2. Providing price information services and chemical raw material procurement for industrial enterprises;
3. Cooperating with Chinese state-owned enterprise factories, the price and quality are very advantageous.
At present, the company is relying on the combination of industry and trade and global procurement to steadily improve the company's value-added ability and compound competitiveness. We have always been committed to producing high-quality and low-cost goods, so we have been sincerely recognized by many customers. Our goal is to produce the best products and satisfy every customer with professional services and attitudes. We look forward to cooperating with you and establishing a win-win relationship with you. Please rest assured that we will definitely satisfy you.

----------packaging and delivery ----------

----------Our Advantages---------
High quality with competitive price
1) Standard:BP/USP/EP/Enterprise standard
2) All Purity≥99%
3) We can provide high quality products with factory price
2. Fast delivery
1) Fast shipment.Various transportation methods for your choice.
2) We have our own agent/remailer/distributor who can help us ship our products very fast , and we have stock in the ir for transferring.
3. Good communication and credit
1) Fast response to customer within 5 hours
2) Good business credit in Europe, US, Japan, Korea, Af r ica and so on.

Complete Product Details – Ethylene Oxide (EO) CAS 75-21-8

1. Basic Identification

CAS No.: 75-21-8

Chemical Name: Ethylene Oxide

Abbreviation: EO

Synonyms: Oxirane, Dimethylene Oxide

EINECS No.: 200-849-9

Molecular Formula: C₂H₄O

Molecular Weight: 44.05

SMILES: C1CO1

UN Number: UN 1040

HS Code: 29101000

Hazard Classification: Class 2.1 Flammable Compressed Gas; Acute Toxicity, Carcinogen

Packing Group I

Chemical Category: Epoxy small ring ether, high active alkylation & ethoxylation monomer

2. Physical & Chemical Properties

Appearance

Colorless gas at normal temperature; colorless transparent volatile liquid under pressurization; sweet ether-like odor.

Core Physical Constants

Melting Point: -111.7 ℃
Boiling Point: 10.7 ℃ (extremely volatile at ambient temp)
Liquid Density (10.7℃): 0.882 g/cm³
Refractive Index n₂₀/D: 1.3597
Closed Cup Flash Point: -20 ℃
Autoignition Temperature: 429 ℃
Explosion Limit in air: 3.0% ~ 100% (very wide explosive range, extremely dangerous)
Vapor Pressure (20℃): 1095 mmHg
Solubility: Fully miscible with water, ethanol, methanol, acetone, benzene, toluene, most organic solvents
pH of aqueous solution: Weakly alkaline, hydrolyzes to ethylene glycol

Key Chemical Characteristics

High ring tension of three-membered epoxy ring, extremely high reactivity; easy ring-opening addition with alcohols, amines, carboxylic acids, water, phenols.
Core raw material for ethoxylation reaction to produce nonionic surfactants, glycols, ethanolamines.
Self-polymerizes under catalyst to form polyethylene glycol (PEG), polyether polyol.
Excellent broad-spectrum sterilization & fumigation performance; widely used for medical device ethylene oxide sterilization.
Severe hazard: Highly flammable, wide explosion range, carcinogenic, irritates eyes, skin and respiratory tract severely.
Reacts violently with strong acids, oxidants, alkaline catalysts; may cause polymerization runaway and explosion.

3. Industrial Export Quality Standard (Refined Grade ≥99.9%

Test Item	Standard Spec	Test Method
Ethylene Oxide Purity	≥99.90 %	GC Gas Chromatography
Water Content	≤50 ppm	Karl Fischer Titration
Acetaldehyde Impurity	≤10 ppm	GC
Carbon Dioxide	≤5 ppm	GC
Formaldehyde	≤1 ppm	Colorimetry
Free Acidity (as Acetic Acid)	≤3 ppm	Acid-Base Titration
Appearance	Colorless transparent liquid under pressure, free of suspended matter	Visual Inspection

4. Main Industrial Applications

4.1 Ethylene Glycol Production (Largest Consumption)

Ring-opening hydrolysis to produce monoethylene glycol (MEG), core monomer for PET polyester fiber, bottle-grade plastic, antifreeze coolant.

4.2 Surfactant & Fine Chemical Ethoxylation

React with fatty alcohol, fatty acid, alkylphenol to make nonionic surfactants for detergent, textile auxiliaries, pesticide emulsifiers.
Manufacture polyethylene glycol PEG, polyether amine, polyether polyol for polyurethane foam, elastomer.

4.3 Ethanolamine Series Intermediates

Reaction with ammonia generates monoethanolamine, diethanolamine, triethanolamine; used for gas desulfurization, water treatment chelating agent, cosmetic raw material, cement grinding aid.

4.4 Medical Sterilization Fumigant

Low-temperature sterilization for disposable medical devices, surgical instruments, plastic, silicone, optical equipment; kills bacteria, spores, viruses completely without damaging precision parts.

4.5 Pharmaceutical & Peptide Synthesis

Alkylation reagent for API and amino acid derivatives synthesis.
Raw material for ethylene glycol ether solvent, plasticizer, preservative.

4.6 Other Fields

Disinfectant for grain, spices, cultural relics fumigation;
Raw material for ethanolamine-based corrosion inhibitor, dye solvent.

5. Safety, Packaging, Storage & Transportation Rules

GHS Hazard Classification

Flammable Gas Category 1
Acute Inhalation Toxicity Category 2
Skin Corrosion Category 1B, Serious Eye Damage Category 1
Carcinogenicity Category 1A

Signal Word: Danger

Main Hazard Statements:

H220 Extremely flammable gas

H330 Fatal if inhaled

H314 Causes severe skin burns and eye damage

H350 May cause cancer

H240 May explode if heated

Export Packaging

Bulk industrial supply: Insulated pressure stainless steel tank container;
Small batch: Seamless pressure steel cylinder (200kg/cylinder), nitrogen buffer filling;
Sterilization special grade: Small high-pressure metal can for medical factory trial use.

Storage Requirements

Independent Class A flammable gas warehouse, temperature controlled ≤25 ℃, full explosion-proof design, static elimination facilities.
Strictly isolated from oxidants, strong acids, alkali catalysts, open flame, heat sources and living areas.
Equipped with EO gas leakage alarm, negative pressure ventilation, full set of anti-corrosion & gas-proof PPE, dry powder fire extinguishers (water mist allowed, water jet forbidden).
Avoid long-term sealed storage to prevent self-polymerization risk.

Transportation Regulation

UN 1040, Class 2.1 flammable toxic compressed gas, Packing Group I

Tank/cylinder must be grounded anti-static during transit; avoid collision, sunlight exposure and high temperature.
Absolutely forbidden mixed loading with oxidants, acid chemicals, edible raw materials.
Full export documents: COA, MSDS, TDS, IMDG dangerous goods declaration, hazard identification certificate.

6. E-commerce Listing Copy (Direct Copy)

Title

Ethylene Oxide EO Oxirane CAS 75-21-8 99.9% High Purity Pressure Liquid Gas Raw Material for Ethylene Glycol Surfactant Medical Sterilization

Short Description

Ethylene Oxide (EO, CAS 75-21-8) high purity ≥99.9% pressurized liquid gas with ultra-high ring-opening reactivity. Main raw material for ethylene glycol, nonionic surfactant, PEG polyether and medical low-temperature sterilization fumigant. Complete set of export hazardous documents COA, MSDS, TDS available.

Full Listing Description

Ethylene Oxide (Oxirane, EO) with CAS No.75-21-8 is a high-active three-membered epoxy compound supplied as colorless volatile liquid under pressure with purity up to 99.9%. Its strained epoxy ring enables universal ring-opening addition reactions, supporting massive downstream fine chemical manufacturing.

Core application sectors include monoethylene glycol PET polyester production; ethoxylation for detergent & textile nonionic surfactants; ethanolamine gas desulfurization agents; PEG/polyether polyol polyurethane raw materials; and low-temperature EO sterilizer gas for medical disposable devices. Strictly controlled trace aldehyde and water impurities meet industrial and medical grade standards.

Products are delivered via insulated stainless steel tank containers or pressure steel cylinders for full container bulk shipment. Classified as UN1040 Class 2.1 flammable toxic compressed dangerous goods, we supply full official customs clearance documents for global sea and land transportation with stable long-term supply capacity.

7. Printable Export COA Template

CERTIFICATE OF ANALYSIS

Product Name: Ethylene Oxide (EO)

CAS No.: 75-21-8

Grade: Export Refined Industrial Grade

Batch No

Net Weight: 200kg/cylinder

Manufacture Date

Test Item	Standard Spec	Test Result	Test Method
Ethylene Oxide Assay	≥99.90 %		GC Gas Chromatography
Water Content	≤50 ppm		Karl Fischer Titration
Acetaldehyde	≤10 ppm		GC
Carbon Dioxide	≤5 ppm		GC
Formaldehyde	≤1 ppm		Colorimetry
Free Acidity (as CH3COOH)	≤3 ppm		Acid-Base Titration
Appearance	Colorless transparent pressurized liquid without sediment	Visual Inspection

Conclusion: This batch meets export refined standard of Ethylene Oxide.

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ECHEMI Editorial Reference

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

Certificates

Basic Info

Product Name:

Ethylene oxide

Other Name:

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

CAS No.:

75-21-8

Molecular Formula:

C2H4O

InChIKeys:

InChIKey=IAYPIBMASNFSPL-UHFFFAOYSA-N

Molecular Weight:

44.05260

Exact Mass:

44.05

EC Number:

618-635-2

HScode:

2910100000

Categories:

Oxides and Peroxides

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

See More Ethylene oxide Properties 

Seller Information

Business Type:
Trader

Main Products:
Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

Location:
Shop No.15, 1st Floor, Building 12, Hengda Huafu, Sucheng District, Suqian City

Payment Terms:
TT against B/L draft before shipment,100% TT in advance

Average lead Time:
30 days

Total Annual Revenue:
Less than $1 million

Total Employees:
5-10

Year of Establishment:
2022
Company Overview

Suqian Hengliyuan Import and Export Corporation, Ltd. is a leading enterprise specializing in the international trade of chemical products. Established in Suqian, Jiangsu Province, China, our company has built a strong reputation for excellence and reliability in the chemical industry.

Our Mission

Our mission is to facilitate global trade by providing high-quality chemical products and exceptional service to our clients. We aim to be a bridge between manufacturers and end-users, ensuring the safe and efficient transfer of chemicals across borders.

Products and Services

We offer a comprehensive range of chemical products, including but not limited to:

Industrial Chemicals: Raw materials for various industries such as pharmaceuticals, agriculture, and manufacturing.

Specialty Chemicals: High-performance chemicals used in specific applications, including water treatment, coatings, and adhesives.

Bulk Chemicals: Large-volume chemicals for industrial processes and manufacturing needs.

Quality Assurance

At Suqian Hengliyuan Import and Export Corporation, Ltd., quality is our top priority. We adhere to stringent quality control measures and international standards to ensure that our products meet the highest levels of purity and performance. Our dedicated quality assurance team conducts rigorous inspections and testing to guarantee the integrity and safety of all our chemical products.

Global Network

Leveraging our extensive network of suppliers and partners, we are able to source and deliver a wide array of chemical products to clients worldwide. Our strategic partnerships and logistical expertise enable us to offer competitive pricing, timely delivery, and customized solutions to meet the diverse needs of our clients.

Commitment to Sustainability

We are committed to sustainable business practices and environmental stewardship. Our operations are designed to minimize environmental impact, and we continuously seek ways to improve our processes and reduce our carbon footprint. We work closely with our suppliers and customers to promote the responsible use and disposal of chemicals.

Customer Focus

Our clients are at the heart of everything we do. We pride ourselves on providing personalized service and building long-term relationships based on trust and mutual benefit. Our experienced team of professionals is dedicated to understanding our clients' needs and delivering solutions that exceed their expectations.

Inquiry History

10 Inquiries

Country	Product	Purchase Quantity	Date Posted
Chile	99% ETHYLENE OXIDE CAS NO 75-21-8 ISO 9001:2005 REACH Verified Producer	1 MT	Nov 18, 2023
India	ethylene oxide	1 KG	Jun 12, 2026
Azerbaijan	Ethylene oxide – Liquid	1 KG	Jun 6, 2025
Malaysia	Ethylene oxide	5 MT	Jan 2, 2025
Vietnam	Ethylene oxide	17 TON	Dec 28, 2023
Malaysia	Ethylene oxide	1 MT	Jul 15, 2024
Malaysia	Ethylene oxide	10000 MT	Nov 1, 2023
Ethiopia	Ethylene oxide	5000 MT	Apr 16, 2025
Malaysia	Ethylene oxide	50000 MT	Jul 30, 2024
Malaysia	Ethylene oxide	5 MT	Jul 22, 2024

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