Mono Ethylene Glycol (MEG)

Mono Ethylene Glycol is a clear, odorless, and viscous liquid primarily used in polyester fiber production, antifreeze formulations, and as a solvent in industrial applications. It is moderately toxic and requires careful handling, particularly to prevent ingestion or inhalation of vapors.

CAS No: 107-21-1

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Formula

C₂H₆O₂

Main Uses

Fiber Manufacturing, Solvents

Appearance

Colorless, Syrupy Liquid

Handling

Harmful if Swallowed

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Safety Highlights

Mono Ethylene Glycol is not classified as flammable, but it is harmful if ingested and can cause severe health effects. It requires appropriate PPE and environmental controls during handling. The safety summary below is based on its official Safety Data Sheet (SDS):

Flammable Liquid

Harmful upon ingestion. May affect kidneys, liver, and nervous system. LD₅₀ (oral, rat): 3.58–12.7 mg/kg.

Toxic on Contact

Can cause redness, irritation, and long-term damage with prolonged exposure.

Corrosive Agent

Vapors may irritate respiratory system; high concentrations can lead to CNS effects.

Emergency Measures

If swallowed, do not induce vomiting in unconscious individuals. Seek medical attention immediately. Flush eyes or skin with plenty of water.

Proper Storage

Store in tightly closed containers in cool, dry, well-ventilated areas. Avoid sources of ignition and incompatible substances (e.g., strong oxidizers).

Regulatory ID

CAS No: 107-21-1 | UN No: Not regulated | DOT Hazard Class: Not classified

Environmental Care

Biodegradable, but large spills can contaminate groundwater. Prevent from entering drains or soil.

PPE Required

Use nitrile gloves, chemical safety goggles or face shield, antistatic protective clothing, and organic vapor respirators when ventilation is inadequate.

Frequently Asked Questions

Get clear answers to common questions about Mono Ethylene Glycol (MEG), including its applications, combustion risk, toxicity, PPE requirements, and safe storage practices. This section is designed to help ensure safe handling and regulatory compliance in industrial and laboratory settings.

What is Mono Ethylene Glycol used for?

It’s widely used in polyester fiber production, de-icing solutions, coolants, and as a solvent in chemical processing.

Is MEG flammable?

No. It has a flash point of 111°C, which makes it combustible but not classified as a flammable liquid under DOT/UN regulations.

How dangerous is MEG if ingested?

It is toxic if swallowed and may lead to kidney failure or central nervous system depression. Immediate medical attention is required.

What PPE should be used while handling MEG?

Gloves, splash goggles or face shield, antistatic protective clothing, and a respirator for organic vapors in poorly ventilated spaces.

How should MEG be stored?

Store in a tightly sealed container in a cool, dry, well-ventilated area away from oxidizing agents and sources of heat.

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