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  • industrial

Plaster of Paris

CAS 26499-65-0

Also registered as 1 other CAS number

10034-76-1

Plaster of Paris chemical structure

Concern score

Not assessed — no hazard data yet.

Plaster of Paris in plain language

What it is

Also known as plaster of paris (gypsum hemihydrate) · Hemihydrate Calcium Sulfate · Calcium sulfate--water (2/2/1) · dicalcium;disulfate;hydrate · Annalin · Crystacal

Show all 24 names

Dried gypsum · Densite · Densite (gypsum) · Dried calcium sulfate · Gipshalbhydrat · Gypsum hemihydrate · Gypsum plaster · Hemihydrate gypsum · P 23 (sulfate) · Plaster of Paris (Ca(SO4).1/2H2O) · respirable fraction Plaster of Paris · total dust Plaster of Paris · Stucco · Sulfuric acid, calcium salt, hydrate (2:2:1) · Ta 20 · calcium sulphate hemihydrate · plaster of paris (mfr cas # 10034-76-1) · plaster of paris mfr cas no 10034-76-1

What it does

We don't have a plain-language description for Plaster of Paris yet.

Recorded functional uses: Basemat · Binder · Filler

Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Plaster of Paris appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • USEPAcommercial use observedEPA CPDat observed this chemical in 183 composition records across product categories including Raw materials, Construction and building materials, Medical/dental. EPA CPDat classifies this chemical for functional uses including Filler, Binder, strength.
    • EPA CPDat observed this chemical in 183 composition records across product categories including Raw materials, Construction and building materials, Medical/dental. EPA CPDat classifies this chemical for functional uses including Filler, Binder, strength.Source →

Evidence & sources

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

3 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated may 15, 2017

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

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 Plaster of Paris in a product composition. These are source records, not Greenveil catalog products.

Source records

183

Named organisations

6

Raw materialsConstruction and building materialsMedical/dentalHome maintenanceArts and crafts/office suppliesIndustrial products

Typical roles

BasematBinderFillerIncreases hardnessStrength
See products using Plaster of Paris →