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The Inhalation Hazard Test; principle and method.

H J Klimisch1

  • 1BASF Aktiengesellschaft, Department of Toxicology, Ludwigshafen, Federal Republic of Germany.

Archives of Toxicology
|April 1, 1988
PubMed
Summary
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The Inhalation Hazard Test (IHT) assesses volatile substance hazards, not just toxicity. This method efficiently compares inhalation risks using fewer animals than traditional LC50 tests.

Area of Science:

  • Toxicology
  • Environmental Health
  • Occupational Safety

Background:

  • Traditional toxicity tests like LC50 are resource-intensive.
  • Assessing acute inhalation hazards of volatile substances requires specific methodologies.
  • Understanding the hazard versus toxicity of inhaled substances is crucial for safety.

Purpose of the Study:

  • To introduce and validate the Inhalation Hazard Test (IHT) as a method for volatile substances.
  • To establish a classification system for differentiating acute inhalation hazards.
  • To demonstrate the IHT's efficiency compared to LC50 tests.

Main Methods:

  • Generation of saturated vapor atmospheres and specialized exposure systems.
  • Determination of nominal concentration and LT0 (lethal time zero) for hazard assessment.

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  • Comparison of IHT results with traditional LC50 methods.

    • Main Results:

    • The IHT effectively measures the hazard, not solely toxicity, of volatile substances.
    • Nominal concentration and saturation temperature are key parameters influencing results.
    • The LT0 determination allows for comparative analysis of different inhalation hazards.
    • A proposed classification system differentiates toxic hazards of volatile substances.

    Conclusions:

    • The Inhalation Hazard Test (IHT) is a suitable method for characterizing acute inhalation hazards.
    • IHT requires fewer animals and is less elaborate than LC50 testing.
    • The proposed classification system aids in differentiating volatile substance hazards.