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TULIPALIN A.

Avoid CAS 547-65-9 / SKIN PROTECTING

Tulipalin A is a naturally occurring alpha-methylene-gamma-butyrolactone, found in plants like tulips and alstroemerias. While it possesses inherent antibiotic properties in its botanical environment, it is predominantly recognized in human contexts as a potent and well-documented skin sensitizer.

Science

Tulipalin A functions as an electrophile due to its reactive α-methylene group, acting as a Michael acceptor. This characteristic enables it to covalently interact with nucleophilic residues in proteins, particularly within T cells. Such interactions have been observed to alter T-cell proteins involved in cellular stress, DNA replication, and cell division, potentially promoting T-cell proliferation and an amplified immune response that clinically presents as contact dermatitis. In plants, it serves as a natural antibiotic, exhibiting both fungicidal and antibacterial effects.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Tulipalin A is highly sensitive to degradation by air, moisture, and light. Optimal stability requires storage in a cool environment, ideally between 2-8 °C, and under an inert gas atmosphere. Its high reactivity, stemming from the α-methylene group, implies potential incompatibilities with nucleophilic compounds. Stabilizers such as 2,6-Di-tert-butyl-p-cresol (BHT) are sometimes used to maintain its integrity.

Conflicts

  • air
  • moisture
  • light
  • nucleophilic compounds

Safety

CIR Status
Not reviewed
Sensitization risk High

Tulipalin A is classified as a potent human skin sensitizer under The Globally Harmonized System (GHS), bearing the hazard statement H317: 'May cause an allergic skin reaction'. It is a well-known cause of occupational contact dermatitis, commonly termed 'tulip fingers' or 'Alstroemeria dermatitis'. There is a complete absence of safety assessments for cosmetic use by major regulatory bodies including CIR, SCCS, or FDA.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Avoid

Due to its established classification as a potent human skin sensitizer and the complete lack of safety or efficacy data for cosmetic applications, Tulipalin A is unequivocally unsuitable for use in precision skincare formulations.


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