Is aluminium hydroxide safe to consume?

Yes, in regulated doses as an antacid. However, excessive consumption can lead to side effects like constipation or more serious issues related to aluminium accumulation.

What is the difference between aluminium hydroxide and alumina?

Aluminium hydroxide (Al(OH)₃) is a hydrated compound. Alumina (Al₂O₃), or aluminium oxide, is the anhydrous form produced by heating aluminium hydroxide.

Why is aluminium hydroxide used in vaccines?

It acts as an adjuvant—a substance that enhances the body's immune response to the antigen, making the vaccine more effective.

How do I know if my medicine contains aluminium hydroxide?

Check the 'Active Ingredients' list on the medication's packaging or patient information leaflet (UK) / Drug Facts label (US).

Is “aluminium hydroxide” formal?

Aluminium hydroxide is usually technical/scientific; pharmaceutical in register.

How do you pronounce “aluminium hydroxide”?

Aluminium hydroxide: in British English it is pronounced /ˌæl.əˈmɪn.i.əm haɪˈdrɒk.saɪd/, and in American English it is pronounced /əˈluː.mə.nəm haɪˈdrɑːk.saɪd/. Tap the audio buttons above to hear it.

aluminium hydroxide: meaning, definition, pronunciation and examples

UK/ˌæl.əˈmɪn.i.əm haɪˈdrɒk.saɪd/US/əˈluː.mə.nəm haɪˈdrɑːk.saɪd/

Technical/Scientific; Pharmaceutical

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Quick answer

What does “aluminium hydroxide” mean?

A white, powdery, inorganic compound with the chemical formula Al(OH)₃, formed when aluminium reacts with water or bases.

Audio

Pronunciation

Definition

Meaning and Definition

A white, powdery, inorganic compound with the chemical formula Al(OH)₃, formed when aluminium reacts with water or bases.

Used as an antacid to treat heartburn, indigestion, and stomach upset; also used as a flame retardant, filler in plastics, and a precursor to other aluminium compounds in industrial processes.

Dialectal Variation

British vs American Usage

Differences

Spelling: 'Aluminium' (UK) vs. 'Aluminum' (US) for the first element. The full compound name follows the respective spelling: 'aluminium hydroxide' (UK) vs. 'aluminum hydroxide' (US).

Connotations

Identical technical and medical connotations in both regions. The difference is purely orthographic.

Frequency

The US spelling 'aluminum hydroxide' is more frequent globally due to the influence of American scientific literature and pharmaceutical labelling.

Grammar

How to Use “aluminium hydroxide” in a Sentence

Aluminium hydroxide is used as a [noun: antacid/adjuvant/filler].The [noun: gel/suspension] contains aluminium hydroxide.[Noun: Magnesium] hydroxide is often combined with aluminium hydroxide.

Vocabulary

Collocations

strong

antacid containing aluminium hydroxidesuspension of aluminium hydroxidealuminium hydroxide gelaluminium hydroxide adjuvant

medium

react with aluminium hydroxideprecipitate aluminium hydroxideadsorbed on aluminium hydroxide

weak

formulation with aluminium hydroxidesource of aluminium hydroxideproperties of aluminium hydroxide

Examples

Examples of “aluminium hydroxide” in a Sentence

verb

British English

The solution will gradually aluminium-hydroxidise over time. (Very rare/constructed)
The process is designed to aluminium-hydroxidise the precursor. (Very rare/constructed)

American English

The mixture will aluminum-hydroxidize under these conditions. (Very rare/constructed)

adverb

British English

N/A (Not standard usage)

American English

N/A (Not standard usage)

adjective

British English

The aluminium-hydroxide-based adjuvant is highly effective.
An aluminium-hydroxide-containing antacid.

American English

The aluminum-hydroxide-free formulation was tested as a control.
An aluminum-hydroxide-rich gel.

Usage

Meaning in Context

Business

In procurement or manufacturing: 'We need to source 500kg of pharmaceutical-grade aluminium hydroxide.'

Academic

In chemistry papers: 'The precipitated aluminium hydroxide was filtered and washed repeatedly.'

Everyday

In pharmacy: 'This indigestion remedy's main ingredient is aluminium hydroxide.'

Technical

In vaccine development: 'The antigen was adsorbed onto an aluminium hydroxide adjuvant to enhance immune response.'

Vocabulary

Synonyms of “aluminium hydroxide”

Strong

gibbsite (a specific mineral form)

Neutral

aluminum hydroxide (US spelling)Al(OH)₃trihydrated alumina

Weak

alumina trihydrate (in industrial contexts)

Vocabulary

Antonyms of “aluminium hydroxide”

acidproton donor

Watch out

Common Mistakes When Using “aluminium hydroxide”

Misspelling as 'aluminium hydroxid' (missing 'e').
Incorrect pronunciation: /haɪˈdrɒk.sɪd/ instead of /haɪˈdrɒk.saɪd/.
Confusing it with 'magnesium hydroxide' (another common antacid).

FAQ

Frequently Asked Questions

: Yes, in regulated doses as an antacid. However, excessive consumption can lead to side effects like constipation or more serious issues related to aluminium accumulation.
: Aluminium hydroxide (Al(OH)₃) is a hydrated compound. Alumina (Al₂O₃), or aluminium oxide, is the anhydrous form produced by heating aluminium hydroxide.
: It acts as an adjuvant—a substance that enhances the body's immune response to the antigen, making the vaccine more effective.
: Check the 'Active Ingredients' list on the medication's packaging or patient information leaflet (UK) / Drug Facts label (US).
: A white, powdery, inorganic compound with the chemical formula Al(OH)₃, formed when aluminium reacts with water or bases.
: Aluminium hydroxide is usually technical/scientific; pharmaceutical in register.
: Aluminium hydroxide: in British English it is pronounced /ˌæl.əˈmɪn.i.əm haɪˈdrɒk.saɪd/, and in American English it is pronounced /əˈluː.mə.nəm haɪˈdrɑːk.saɪd/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

“N/A”

Learning

Memory Aids

Mnemonic

Think: 'Ali' the chemist has a 'mini' (aluminium) test tube with water (hydro) and oxygen (oxide) to make an antacid.

Conceptual Metaphor

A SPONGE (it neutralises/stomach acid by adsorption/chemical binding).

Practice

Quiz

Fill in the gap

For heartburn, a doctor might recommend an antacid containing .

Multiple Choice

In which industry is aluminium hydroxide commonly used as a flame retardant filler?