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Organometallic compounds

Methylaluminoxane

Also known as Methyl(oxo)alumane, mealo

CAS 120144-90-3Formula CH3AlOMolar mass 58.02 g/molEC 485-360-0
GHS signal word: Danger. Pictograms: Flammable, Corrosive
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Methylaluminoxane chemical structure, CH3AlO, CAS 120144-90-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
120144-90-3
Formula
CH3AlO
Molar mass
58.02 g/mol
EC number
485-360-0
HS code
293190
Category
Organometallic compounds

What is Methylaluminoxane?

Plain description, key identifiers and synonyms

Methylaluminoxane is a chemical substance with the molecular formula CH3AlO and a molar mass of 58.02 g/mol. Its CAS registry number is 120144-90-3. The IUPAC name is methyl(oxo)alumane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl(oxo)alumane
CAS number
120144-90-3Other or deprecated CAS: 124088-77-3
EC number
485-360-0
Molecular formula
CH3AlO
InChIKey
CPOFMOWDMVWCLF-UHFFFAOYSA-N
InChI
InChI=1S/CH3.Al.O/h1H3;;
SMILES (canonical and isomeric)
C[Al]=O

Synonyms

  • Methyl(oxo)alumane
  • mealo

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
58.02 g/molcalc.
Exact mass
57.9999 Dacalc.
LogP (octanol/water)
0.08calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive

Hazard statements

  • H250Catches fire spontaneously if exposed to air.
  • H260In contact with water releases flammable gases which may ignite spontaneously.
  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
Precautionary statements (23)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P223Do not allow contact with water.
  • P231Handle and store contents under inert gas.
  • P231 + P232Handle and store contents under inert gas. Protect from moisture.
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P402 + P404Store in a dry place. Store in a closed container.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Methylaluminoxane suppliers

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Methylaluminoxane price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Functional uses

  • Catalyst

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Methylaluminoxane is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Methylaluminoxane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Methylaluminoxane, based on the data on this page

What is Methylaluminoxane?

Methylaluminoxane is a chemical substance with the molecular formula CH3AlO and a molar mass of 58.02 g/mol. Its CAS registry number is 120144-90-3. The IUPAC name is methyl(oxo)alumane.

What is the CAS number of Methylaluminoxane?

The CAS registry number of Methylaluminoxane is 120144-90-3. Other or deprecated CAS numbers: 124088-77-3.

What is the molecular formula and weight of Methylaluminoxane?

The molecular formula of Methylaluminoxane is CH3AlO and its molar mass is 58.02 g/mol.

What is Methylaluminoxane used for?

Known uses and roles of Methylaluminoxane include catalyst.

Is Methylaluminoxane hazardous?

Methylaluminoxane carries the GHS signal word "Danger". Main hazards: catches fire spontaneously if exposed to air, in contact with water releases flammable gases which may ignite spontaneously, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Methylaluminoxane?

Methylaluminoxane is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Methylaluminoxane?

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What is the price of Methylaluminoxane?

Suppliers quote Methylaluminoxane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Methylaluminoxane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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