1. What are VTRs?
A VTR is a toxicological value defined for the purpose of quantifying a risk to human health from respiratory exposure based on exposure duration (acute, subchronic, or chronic). These values apply to the population as a whole, including sensitive population groups (children, pregnant women, the elderly, and the sick).
Acute and chronic VTRs can also be defined orally, in cases of food poisoning, but this is not the subject of this fact sheet.
1.1 Definition
VTRs are defined for all possibilities of accidental or fugitive exposure by inhalation. A distinction is made between:
acute VTRs (VTR/A) defined in the industrial context...
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Bibliography
Also in our database
Bibliography
ANSES - REPORT, Guide to developing VTRs: criteria and methods (2010).
ECETOC - ECETOC Technical Report 43 Emergency Exposure Indices for Industrial Chemicals (1991).
ECETOC - Technical Report 87, Evaluation of existing Methodologies for setting Acute Exposure Threshold Levels to Derive an European AETL Methodology (2006).
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Websites
This site offers various guides and resources to help you define your emergency response in the event of an accidental release.
In particular, you will find reports on acute toxicity thresholds, including the procedure for determining thresholds...
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