Patch testing with p-toluene diamine preparations of different ages.

@article{Geier2005PatchTW,
  title={Patch testing with p-toluene diamine preparations of different ages.},
  author={Johannes Geier and Holger Lessmann and Axel Schnuch and Stephan Hildebrandt and Wolfgang Uter},
  journal={Contact dermatitis},
  year={2005},
  volume={53 2},
  pages={75-9}
}
Analyses of the stability of 1% p-toluene diamine (PTD) in petrolatum used for patch testing showed a rapid decline of the PTD concentration down to 0.1%, possibly due to the generation of dye complexes. To study whether the diagnostic quality of this test preparation is compromised by the chemical reactions taken place, a multicentre study was conducted by… CONTINUE READING