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  • industrial

Bis(2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite

CAS 126505-35-9

Also registered as 1 other CAS number

137398-75-5

Concern score

Not assessed — no hazard data yet.

Bis(2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite in plain language

What it is

Also known as At 633 · Ultranox 633

What it does

Used in consumer products as an antioxidant.

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

Regulation

No restrictions found. Bis(2,4,6-tri-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 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Antioxidant, Flame retardant.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Antioxidant, Flame retardant.Source →

Evidence & sources

No graded research studies for Bis(2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

2 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated 2021-06-08

    Open →
  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    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(2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite in a product composition. These are source records, not Greenveil catalog products.

Named organisations

1

Typical roles

Antioxidant
See products using Bis(2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite →