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Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite

CAS 26741-53-7

Also registered as 7 other CAS numbers

87498-44-0 · 106234-83-7 · 940968-66-1 · 1233874-33-3 · 1251905-26-6 · 1627542-98-6 · 2919347-95-6

Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite chemical structure

Concern score

Not assessed — no hazard data yet.

Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite in plain language

What it is

Also known as Adk stab pep 24 · Adk stab pep 24G · Alkanox p 24 · Antioxidant 242 · Antioxidant 626 · Antioxidant 6260

Show all 16 names

Antioxidant th 24 · At 626 · Doverphos s 9432 · Antioxidant 24 · Bis (2,4-di-t-butylphenyl)Pentaerythritol Diphosphite · Bis(2,4-ditertbutylphenol)pentaerythritol diphosphite · DI(2,4-DI-TERT-BUTYLPHENYL)PENTAERYTHRITOL diphosphite · Irgafos 126 · UV Inhibitor · Ultranox 624

What it does

Used in consumer products as an antioxidant and a stabiliser.

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

Regulation

No restrictions found. Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • USEPAcommercial use observedEPA CPDat observed this chemical in 5 composition records across product categories including Construction and building materials, Construction, Raw materials. EPA CPDat classifies this chemical for functional uses including Antioxidant, Stabilizing agent, polymerization initiators / inhibitors / catalysts>inhibitors.
    • EPA CPDat observed this chemical in 5 composition records across product categories including Construction and building materials, Construction, Raw materials. EPA CPDat classifies this chemical for functional uses including Antioxidant, Stabilizing agent, polymerization initiators / inhibitors / catalysts>inhibitors.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

No graded research studies for Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

5 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated january 31, 2017

    Open →
  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    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 →

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 Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite in a product composition. These are source records, not Greenveil catalog products.

Source records

5

Named organisations

6

Construction and building materialsConstructionRaw materials

Typical roles

AntioxidantStabiliser
See products using Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite →