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Patch testing with cement containing iron sulfate.

M Bruze1, S Fregert, B Gruvberger

  • 1Department of Occupational Dermatology, University Hospital, Lund, Sweden.

Dermatologic Clinics
|January 1, 1990
PubMed
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Adding iron sulfate to cement transforms harmful hexavalent chromium into a safe form. This prevents allergic reactions in individuals sensitive to chromate in cement.

Area of Science:

  • Environmental chemistry
  • Occupational health
  • Dermatology

Background:

  • Hexavalent chromium (chromate) in cement is a known skin sensitizer.
  • Chromate allergy can cause allergic contact dermatitis.
  • Iron sulfate is added to cement to reduce chromate sensitization.

Purpose of the Study:

  • To evaluate the efficacy of iron sulfate in preventing allergic reactions to cement.
  • To compare the allergenic potential of cement with and without iron sulfate in vivo.

Main Methods:

  • An in vivo study involving eight individuals with known chromate hypersensitivity.
  • Patch testing was performed using water extracts of cement with and without iron sulfate.
  • Extracts were appropriately buffered to ensure accurate results.

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Main Results:

  • Cement containing iron sulfate did not elicit any allergic patch-test reactions.
  • A water extract of cement with iron sulfate, when buffered, showed no allergenic potential.
  • This suggests iron sulfate effectively neutralizes the allergenic properties of cement.

Conclusions:

  • Iron sulfate addition to cement is an effective preventive measure against chromate-induced allergic contact dermatitis.
  • The transformation of hexavalent chromium to trivalent chromium by iron sulfate mitigates sensitization risks.
  • Further research can explore optimal concentrations and long-term effects.