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Diethyl phthalate

CAS 1431865-87-0 · 40/100 · High conf.

Also registered as 1 other CAS number

84-66-2

Diethyl phthalate chemical structure

Concern score

40/100Moderate concern based on regulatory listings.
High confidence

Diethyl phthalate in plain language

What it is

Also known as Ethyl phthalate · Phthalic acid ethyl ester · diethyl ester Phthalic acid · 1,2-BENZENEDICARBOXYLIC acid, diethyl ester · Diethyl benzene-1,2-dicarboxylate · Diethyl ester o-phthalic acid

Show all 28 names

1,2-Benzenedicarboxylic acid, 1,2-diethyl ester · 1,2-Diethyl phthalate · Anozol · Di-n-ethyl phthalate · Diethyl 1,2-benzenedicarboxylate · Diethyl o-phenylenediacetate · Diethyl o-phthalate · Diethylphthalat · Estol 1550 · Neantine · Palatinol A · Phthalol · Phthalsaeurediaethylester · Placidol E · Solvanol · Unimoll DA · diethyl phthalate (sara iii) · diethyl phthalate (sara 313) (cercla) · ftalato de dietilo · o-Benzenedicarboxylic acid diethyl ester · o-Bis(ethoxycarbonyl)benzene · phthalic acid diethyl ester

What it does

Used in cosmetics as a solvent, a hair conditioner and a film former.

  • Solvent
  • Hair conditioning
  • Film forming
  • Plasticiser
  • Fragrance
  • Denaturant
Is it a concern?
Moderate concern: no hazard classifications on record. It is listed for cosmetic use in the EU.

Why it's flagged

EPA CPDat observed this chemical in 147 composition records across product categories including Vehicle, Laboratory supplies, Cleaning products and household care.

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Diethyl phthalate appears in these published regulatory listings.

  • Inactive ingredient in US drugs

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Pharma
  • Food
  • Industrial
  • USFDAinactive ingredient database10 entries
    • Route: ORAL; Dosage form: CAPSULE, COATED PELLETS; Potency: 6.8 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, DELAYED RELEASE; Potency: 12 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, EXTENDED RELEASE; Maximum daily exposure: 172 mgSource →
    • Route: ORAL; Dosage form: TABLET; Maximum daily exposure: 6 mgSource →
    • Route: ORAL; Dosage form: TABLET, CHEWABLE; Maximum daily exposure: 6 mgSource →
    • Route: ORAL; Dosage form: CAPSULE; Maximum daily exposure: 9 mgSource →
    • Route: ORAL; Dosage form: TABLET, DELAYED RELEASE; Maximum daily exposure: 131 mgSource →
    • Route: ORAL; Dosage form: TABLET, EXTENDED RELEASE; Maximum daily exposure: 43 mgSource →
    • Route: ORAL; Dosage form: TABLET, FILM COATED; Maximum daily exposure: 4 mgSource →
    • Route: ORAL; Dosage form: TABLET, COATED; Potency: 2.8 mgSource →
  • EUCosIngActiveListed in CosIng inventory for cosmetic use.
    • Listed in CosIng inventory for cosmetic use.Source →
  • EUEFSAEFSA statementStatement of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food (AFC Panel) on the re-classification of some phthalates for consistency with the new SCF guidelines for food contact materials (EFSA AFC)
    • Statement of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food (AFC Panel) on the re-classification of some phthalates for consistency with the new SCF guidelines for food contact materials (EFSA AFC)Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 147 composition records across product categories including Vehicle, Laboratory supplies, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Fragrance, Solvent, Film former.
    • EPA CPDat observed this chemical in 147 composition records across product categories including Vehicle, Laboratory supplies, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Fragrance, Solvent, Film former.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • 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.

  • EFSA

    European Food Safety Authority

    • Statement of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food (AFC Panel) on the re-classification of some phthalates for consistency with the new SCF guidelines for food contact materials (EFSA AFC)

      2004 · EU EFSA listing · Read the source →

Evidence & sources

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

8 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EFSA OpenFoodTox

    regulatory · updated 2026-10-04

    Open →

  • EPA Chemical and Products Database

    exposure · updated november 6, 2019

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA Inactive Ingredient Database

    regulatory · updated 2026-01-09

    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

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

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

Source records

147

Named organisations

6

VehicleLaboratory suppliesCleaning products and household careMedical/dentalConstruction and building materialsPersonal care

Typical roles

SolventHair conditioningFilm formingPlasticiserFragranceDenaturant
See products using Diethyl phthalate →

Catalog

Found in these products

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

See all 8 →Find products without it →