cleaning
industrial
pharma

Aluminum hydroxide

CAS 21645-51-2

Also registered as 21 other CAS numbers

1302-29-0 · 8012-63-3 · 8064-00-4 · 12040-59-4 · 12252-70-9 · 13783-16-9 · 16657-47-9 · 51330-22-4 · 106152-09-4 · 128083-27-2 · 151393-94-1 · 156259-59-5 · 159704-77-5 · 227961-51-5 · 507478-50-4 · 546141-62-2 · 546141-68-8 · 1071843-34-9 · 1847408-13-2 · 2243017-67-4 · 2506099-58-5

Concern score

Not assessed — no hazard data yet.

Aluminum hydroxide in plain language

What it is: Also known as Dried aluminum hydroxide gel · Aluminium hydroxide · Aluminum hydroxide gel f 500 · Aluminum hydroxide gel f 5000 · Dried aluminium hydroxide gel · Dried aluminum hydroxide
Show all 47 names
Algeldrate anhydrous · Alternagel · Alu-cap · Alumina hydrate · Aluminium hydroxide dried gel · Aluminium hydroxide gel f 500 · Aluminium hydroxide gel f 5000 · Dried aluminium hydroxide · Aluminum hydrate · Aluminium trihydroxide · Hydrated alumina · aluminum trihydroxide · Alhydrogel · Alumina trihydrate · Al(OH)3 · Alcoa A 325 · Alcoa AS 301 · Alcoa C 30BF · Alcoa C 330 · Alum · Alum Adjuvant · Alumina Trihydateylate · Aluminum Trihydrate · Aluminum Trihydrate (ATH) · Aluminum hydroxide (Al(OH)3) · Aluminum hydroxide, · Aluminum(III) hydroxide · Amphojel · Anodized Aluminum · Basalgel · Dermadrox · Di-mu-hydroxytetrahydroxydialuminum · Hydroxyde d' aluminium · Silicon hydroxide · WinGel · aluminium(III) hydroxide · Aluminum (as hydroxide) · AS04 component aluminum hydroxide · Foamcoat component aluminum hydroxide · Foamicon component aluminum hydroxide · Gaviscon component aluminum hydroxide
What it does: Used in consumer products as a colourant, a humectant and a thickener.
Colourant
Humectant
Thickener
Conditioner
Opacifier
Is it a concern?: We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Aluminum hydroxide appears in these published regulatory listings.

In marketed US drugs
Inactive ingredient in US drugs

Recorded in these product areas

Found in consumer products
Cleaning
Industrial

USFDAinactive ingredient database4 entries — 2 administration routes
- Route: ORAL; Dosage form: CAPSULE; Potency: NASource →
- Route: ORAL; Dosage form: TABLET; Potency: 50 mgSource →
- Route: TOPICAL; Dosage form: CREAM; Potency: 5 %w/wSource →
- Route: TOPICAL; Dosage form: OINTMENT; Potency: NASource →
USFDAlisted in openFDA substance2 entries
- openFDA substance registry classifies this ingredient as concept.Source →
- openFDA substance registry classifies this ingredient as chemical.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 3752 composition records across product categories including Construction and building materials, Raw materials, Furniture and furnishings. EPA CPDat classifies this chemical for functional uses including Humectant, Softener and conditioner, Viscosity modifier.
- EPA CPDat observed this chemical in 3752 composition records across product categories including Construction and building materials, Raw materials, Furniture and furnishings. EPA CPDat classifies this chemical for functional uses including Humectant, Softener and conditioner, Viscosity modifier.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 134 active drug products and 138 total products.
- FDA NDC lists this ingredient in 134 active drug products and 138 total products.Source →

Evidence & sources

No graded research studies for Aluminum hydroxide yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

EPA Chemical and Products Database
exposure · updated october 19, 2016
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
Open →
FDA Inactive Ingredient Database
regulatory · updated 2026-01-09
Open →
FDA National Drug Code Directory
regulatory · updated 2027-12-31
Open →
FDA GSRS UNII
registry · updated 2026-02-26
Open →
openFDA Substance
registry · updated 2026-05-24
Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Open →

Reference links (5)

Openfda substance

lagunaclay.com

Read →

Openfda substance

chemicalland21.com

Read →

Openfda substance

drugoffice.gov.hk

Read →

Openfda substance

drugoffice.gov.hk

Read →

Openfda substance

brenntag-biosector.com

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Aluminum hydroxide in a product composition. These are source records, not Greenveil catalog products.

Source records

3,752

Named organisations

Construction and building materialsRaw materialsFurniture and furnishingsCleaning products and household careCons. electronics, mech. appliances, and machineryHome maintenance

Typical roles

ColourantHumectantThickenerConditionerOpacifier

See products using Aluminum hydroxide →

Catalog

Found in these products

Their ingredient lists include Aluminum hydroxide; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 1000+ →Find products without it →

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Aluminum hydroxide in the catalog.