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4-Nitrophenol

CAS 856824-67-4

Also registered as 5 other CAS numbers

856824-71-0 · 88-75-5 · 100-02-7 · 554-84-7 · 25154-55-6

4-Nitrophenol chemical structure

Concern score

Not assessed — no hazard data yet.

4-Nitrophenol in plain language

What it is

On cosmetic ingredient lists it appears as “Nitrophenol”.

Also known as Nitrophenol · p-Nitrophenol · Acetaminophen related compound f · Niphen · Nitrophenol, p- · P-hydroxynitrobenzene

Show all 18 names

Paranitrophenol · Phenol, p-nitro- · 1-Hydroxy-4-nitrobenzene · 4-Hydroxy-1-nitrobenzene · 4-Hydroxynitrobenzene · 4-nitrofenol · 4-nitrophenol (p-nitrophenol) (sara iii) · NCI-C55992 · Paranitrofenol · Paranitrofenolo · Phenol, 4-nitro- · para-nitrophenol

What it does

Used in cosmetics as a hair dye.

  • Hair dyeing
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. 4-Nitrophenol appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Pharma
  • Food
  • Industrial
  • EUCosIngActiveListed in CosIng inventory for cosmetic use.
    • Listed in CosIng inventory for cosmetic use.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 49 composition records across product categories including Food and drug, Laboratory supplies, Raw materials.
    • EPA CPDat observed this chemical in 49 composition records across product categories including Food and drug, Laboratory supplies, Raw materials.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for 4-Nitrophenol. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for 4-Nitrophenol yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated September 2001

    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.

Food use

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.

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 4-Nitrophenol in a product composition. These are source records, not Greenveil catalog products.

Source records

49

Named organisations

3

Food and drugLaboratory suppliesRaw materialsSpecialty occupational productsLandscape/yardHome maintenance

Typical roles

Hair dyeing
See products using 4-Nitrophenol →