Skip to content

Prohibited Substance

Trioxsalen [USAN]

CAS 3902-71-4 Updated
4

Safety score · 0–100

Avoid

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

4,5',8-Trimethylpsoralen, used in PUVA photochemotherapy. EU-banned in cosmetics under Annex II — psoralens combined with UVA are IARC Group 1 carcinogens.

Skin benefits

  • Not a cosmetic ingredient

Known concerns

  • EU Annex II prohibited
  • Psoralen + UVA carcinogenic class
  • Severe photosensitizer
  • Prescription drug

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

Related prohibited substances

4
DL-aminomethyl-3-hydroxybenzyl alcohol hydrochloride
Prohibited Substance
 4
Methyl acrylamidomethoxyacetate, if the content of acrylamide >= 0.1%
Prohibited Substance
 4
Neostigmine bromide [INN:BAN:JAN]
Prohibited Substance
 4
Tar, coal
Prohibited Substance
 4
benzylmorphine
Prohibited Substance
 5
Dryvax (Smallpox Vaccine)
Prohibited Substance
 5
Methylprednisolone Sodium Succinate [USAN:JAN]
Prohibited Substance
 3
Nickel oxide
Prohibited Substance

Check your shelf

Find Trioxsalen [USAN] in your products.

Scan any cosmetic product with LuxSense to see if it contains Trioxsalen [USAN] and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.