Diallyl phthalate on your skin: a safety profile

What is diallyl phthalate?

The IUPAC name is bis(prop-2-enyl) benzene-1,2-dicarboxylate.

Also known as: bis(prop-2-enyl) benzene-1,2-dicarboxylate, Allyl phthalate, Diallylphthalate, Dapon R.

IUPAC name

bis(prop-2-enyl) benzene-1,2-dicarboxylate

CAS number

131-17-9

Molecular formula

C14H14O4

Molecular weight

246.26 g/mol

SMILES

C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C

PubChem CID

8560

Regulatory consensus

4 regulatory and scientific bodies have classified Diallyl phthalate. The classifications differ — that's the data.

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where you encounter diallyl phthalate

• Consumer Products — plasticized PVC, adhesives, coatings, sealants
• Personal Care — nail polish, fragrance (as fixative)
• Fragrance — perfume, cologne, scented personal care products, household fragrance products, candles
  Identified in Fragrance Ingredient Safety Priority Research database (2,325 ingredients)

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Diallyl phthalate:

• DINCH
  Trade-offs: Alternative plasticizer; compatibility with polymer matrix required; migration rate and toxicological profile of alternative should be assessed; mechanical properties (flexibility, tensile strength) may change.
  Relative cost: 1.2-2×
• Bio-based plasticizers (epoxidized soybean oil)
  Trade-offs: Alternative plasticizer; compatibility with polymer matrix required; migration rate and toxicological profile of alternative should be assessed; mechanical properties (flexibility, tensile strength) may change.
  Relative cost: 2-5× conventional

Frequently asked questions