What is the CAS number of Methanol?

The CAS Registry Number of Methanol is 67-56-1.

What is the chemical formula of Methanol?

Methanol has the formula CH4O and a molecular weight of about 32.04 g/mol.

What are the GHS hazards of Methanol?

Methanol carries the signal word Danger. Its harmonised hazard statements are H225, H301, H311, H331, H370: Highly flammable liquid and vapour.; Toxic if swallowed.; Toxic in contact with skin.; Toxic if inhaled.; Causes damage to organs..

Which GHS pictograms apply to Methanol?

GHS02 (Flame), GHS06 (Skull and crossbones), GHS08 (Health hazard).

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Methanol CAS 67-56-1

Methanol (CAS 67-56-1, formula CH4O) is an industrial chemical with a molecular weight of about 32.04 g/mol. Its harmonised GHS classification carries the signal word Danger.

Identifiers

Name: Methanol
CAS number: 67-56-1
CLP index number: 603-001-00-X
EC number: 200-659-6
Molecular formula: CH4O
Molecular weight: 32.04 g/mol
Also known as: Methyl alcohol, Carbinol, Wood alcohol, Wood spirits, MeOH, Methyl hydroxide

GHS classification

Harmonised classification under the CLP Regulation (Annex VI), index number 603-001-00-X. Signal word: Danger.

Hazard class	Code	Statement
Flammable liquids	H225	Highly flammable liquid and vapour.
Acute toxicity, oral	H301	Toxic if swallowed.
Acute toxicity, dermal	H311	Toxic in contact with skin.
Acute toxicity, inhalation	H331	Toxic if inhaled.
Specific target organ toxicity, single exposure	H370	Causes damage to organs.

Pictograms

GHS02 Flame
GHS06 Skull and crossbones
GHS08 Health hazard

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 Methanol

If Methanol 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

Prepare SDS and labels in SDS Desk

Add Methanol by name or CAS number, build your product composition and export a reviewed 16-section SDS. 7-day free trial.

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Frequently asked questions

What is the CAS number of Methanol?: The CAS Registry Number of Methanol is 67-56-1.
What is the chemical formula of Methanol?: Methanol has the formula CH4O and a molecular weight of about 32.04 g/mol.
What are the GHS hazards of Methanol?: Methanol carries the signal word Danger. Its harmonised hazard statements are H225, H301, H311, H331, H370: Highly flammable liquid and vapour.; Toxic if swallowed.; Toxic in contact with skin.; Toxic if inhaled.; Causes damage to organs..
Which GHS pictograms apply to Methanol?: GHS02 (Flame), GHS06 (Skull and crossbones), GHS08 (Health hazard).

Other chemicals

Acetic acid CAS 64-19-7
Acetone CAS 67-64-1
Ammonia CAS 7664-41-7
Benzene CAS 71-43-2

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