Ethylene glycol CAS 107-21-1

Ethylene glycol (CAS 107-21-1, formula C2H6O2) is an industrial chemical with a molecular weight of about 62.07 g/mol. Its harmonised GHS classification carries the signal word Warning.

Identifiers

Name

Ethylene glycol

CAS number

107-21-1

CLP index number

603-027-00-1

EC number

203-473-3

Molecular formula

C2H6O2

Molecular weight

62.07 g/mol

Also known as

1,2-Ethanediol, Monoethylene glycol, Ethane-1,2-diol, MEG, Glycol, Antifreeze

GHS classification

Harmonised classification under the CLP Regulation (Annex VI), index number 603-027-00-1. Signal word: Warning.

Pictograms

• GHS07 Exclamation mark

Suppliers may classify additional hazards from their own data, so a supplier's Safety Data Sheet can list more than the harmonised entry.

Source: Regulation (EC) No 1272/2008, Annex VI, retrieved 2026-10-10. Confirm against the current consolidated text and your supplier's SDS before relying on it.

Creating a Safety Data Sheet for a product containing Ethylene glycol

If Ethylene glycol is an ingredient, record its CAS number and concentration in Section 3 and use it in the mixture classification that drives Section 2 and the label.

How to write a Safety Data Sheet · GHS mixture classification

Frequently asked questions

What is the CAS number of Ethylene glycol?

The CAS Registry Number of Ethylene glycol is 107-21-1.

What is the chemical formula of Ethylene glycol?

Ethylene glycol has the formula C2H6O2 and a molecular weight of about 62.07 g/mol.

What are the GHS hazards of Ethylene glycol?

Ethylene glycol carries the signal word Warning. Its harmonised hazard statements are H302: Harmful if swallowed..

Which GHS pictograms apply to Ethylene glycol?

GHS07 (Exclamation mark).

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Information is provided for general reference and is not a substitute for a supplier's Safety Data Sheet or professional advice. See our disclaimer.