Immunologic contact urticaria due to airborne methylhexahydrophthalic and methyltetrahydrophthalic anhydrides.

@article{Tarvainen1995ImmunologicCU,
  title={Immunologic contact urticaria due to airborne methylhexahydrophthalic and methyltetrahydrophthalic anhydrides.},
  author={Kyllikki Tarvainen and Riitta Jolanki and Tuula Estlander and O Tupasela and Pirkko Pf{\"a}ffli and Lasse Kanerva},
  journal={Contact dermatitis},
  year={1995},
  volume={32 4},
  pages={204-9}
}
Acid anhydrides are low-molecular-weight chemicals known to cause respiratory irritancy and allergy. Skin allergy has on rare occasions been reported. 2 workers contracted hives and itching on uncovered skin after 2 months exposure to methyltetrahydrophthalic anhydride (MTHPA) and methylhexahydrophthalic anhydride (MHHPA), to which they had airborne exposure. Later, the patients also developed conjunctivitis, rhinitis, sore throat, cough or asthma. In addition to MTHPA, 1 worker was also… CONTINUE READING