What function does DIETHYL PHTHALATE serve in cosmetics?

According to the EU CosIng inventory, DIETHYL PHTHALATE carries the following function designation(s): DENATURANT, FILM FORMING, FRAGRANCE, HAIR CONDITIONING, PLASTICISER, SOLVENT.

What other records share CAS 84-66-2?

CAS 84-66-2 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains DIETHYL PHTHALATE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3328215/10/2010

DIETHYL PHTHALATE

Diethyl phthalate

DIETHYL PHTHALATE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 84-66-2

CAS 84-66-2PubChem CID 6781

Diethyl Phthalate

Diethyl phthalate is the diethyl ester of benzene-1,2-dicarboxylic acid. It has a role as a teratogenic agent, a neurotoxin and a plasticiser. It is an ethyl ester, a phthalate ester and a diester. — ChEBI

IUPAC name: diethyl benzene-1,2-dicarboxylate

Molecular formula: C12H14O4
Molecular weight: 222.24 g/mol
Exact mass: 222.08920892 Da
XLogP3: 2.5
Topological polar surface area: 52.6 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

Ethyl phthalatephthalic acid diethyl esterAnozolNeantinePhthalolSolvanolPalatinol APlacidol E

16 more reported names

Unimoll DADiethyl o-phthalatePhthalsaeurediaethylestero-Bis(ethoxycarbonyl)benzeneDiethyl 1,2-benzenedicarboxylateEstol 15501,2-Benzenedicarboxylic acid, diethyl esterDi-n-ethyl phthalateDiethyl o-phenylenediacetate1,2-Diethyl phthalatePhthalic acid, diethyl estero-Benzenedicarboxylic acid diethyl esterRCRA waste number U088Diethylester kyseliny ftalove1,2-benzenedicarboxylic acid diethyl ester1,2-diethyl benzene-1,2-dicarboxylate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:34698
ChEMBL:CHEMBL388558
EPA DTXSID:DTXSID7021780
PubMed:42155030
PubMed:40551524
PubMed:40456493
PubMed:40323316
PubMed:39947446
PubMed:39150890
PubMed:38954831
PubMed:37942807
PubMed:37839492
PubMed:37690569
PubMed:37689172
PubMed:37552060

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for DIETHYL PHTHALATE

INCI name

DIETHYL PHTHALATE

INN name

diethyl phthalate

Description

Diethyl phthalate

Record provenance

Inventory reference: 33282
Imported identity: DIETHYL PHTHALATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for DIETHYL PHTHALATE

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Key data

CAS

84-66-2

201-550-6

Restriction

—

Function

DENATURANT: Rendering cosmetics unpalatable. Mostly added to cosmetics containing ethyl alcohol to make it unsuitable for ingestion.
FILM FORMING: Producing (upon application) a continuous film on the skin, hair or nails.
FRAGRANCE: Imparting an odour or taste. Creating a perceivable pleasant smell and/or masking a bad smell.
HAIR CONDITIONING: Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
PLASTICISER: Softening and making supple synthetic polymers that otherwise could not be easily deformed, spread or worked out.
SOLVENT: Dissolving other components of cosmetics. Solvents are usually liquids (aqueous and nonaqueous).

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#8570 · DIETHYL PHTHALATE

Ingredients with overlapping formulation functions

CINNAMOMUM CASSIA LEAF OILDENATURANT, FRAGRANCE, PERFUMING

COAL TARANTI-SEBORRHEIC, ANTIMICROBIAL, DENATURANT

DENATONIUM BENZOATEDENATURANT, FRAGRANCE

DENATONIUM SACCHARIDEDENATURANT

EUCALYPTOLDENATURANT, PERFUMING, TONIC

EUGENOLDENATURANT, PERFUMING, TONIC

FORMALDEHYDEANTIMICROBIAL, DENATURANT, PRESERVATIVE

GLYCERINDENATURANT, HAIR CONDITIONING, HUMECTANT, ORAL CARE, PERFUMING, SKIN CONDITIONING, SKIN PROTECTING,…

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How DIETHYL PHTHALATE appears in the CosIng inventory

The CosIng inventory lists DIETHYL PHTHALATE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

DIETHYL PHTHALATE is also tagged with 6 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

DIETHYL PHTHALATE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, DIETHYL PHTHALATE carries the following function designation(s):

CAS 84-66-2 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for DIETHYL PHTHALATE

This page reproduces the CosIng inventory entry for DIETHYL PHTHALATE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research DIETHYL PHTHALATE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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