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Related Experiment Videos

Estimating in vitro glass fiber dissolution rate from composition.

W Eastes1, R M Potter, J G Hadley

  • 1Owens Corning, Science and Technology Center, 2790 Columbus Road, Route 16, Granville, OH 43023-1200, USA. walter.eastes@owenscorning. com

Inhalation Toxicology
|March 15, 2000
PubMed
Summary

This study presents a new method to calculate the dissolution rate constant of borosilicate glass fibers in the lung using their oxide composition. This calculation aids in predicting potential health risks from fiber inhalation.

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Area of Science:

  • Materials Science
  • Toxicology
  • Inorganic Chemistry

Background:

  • Borosilicate glass fibers are used in various applications, and their dissolution in biological environments is crucial for toxicological assessment.
  • Accurate prediction of dissolution rates is essential for understanding potential health effects, particularly following inhalation exposure.

Purpose of the Study:

  • To develop and validate a method for calculating the in vitro dissolution rate constant of borosilicate glass fibers.
  • To correlate the dissolution rate constant with the oxide composition of the glass fibers.

Main Methods:

  • A linear function was established correlating the logarithm of the dissolution rate with the oxide composition (weight percent).
  • The method was validated using a set of borosilicate glass fiber compositions with varying dissolution rate constants.

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Main Results:

  • The calculated dissolution rate constants showed good agreement with measured values across a range of compositions.
  • The predictive capability of the method was demonstrated over a significantly wider range of dissolution rates than initially used for parameter determination.

Conclusions:

  • The developed method provides a reliable estimation of borosilicate glass fiber dissolution rates based on composition.
  • This approach can be utilized to assess the potential for disease development after animal inhalation or intraperitoneal studies, aiding in risk assessment.