How are chemical substances classified?
Acute systemic toxicity: lethal doses LD50 and LC50, in vitro tests

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How are chemical substances classified?


Acute systemic toxicity: lethal doses LD50 and LC50, in vitro tests

Author : Alain LOMBARD

Publication date: May 10, 2025 | Lire en français

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3. How are chemical substances classified?

The value obtained is compared with a table which classifies the chemical substance in a hazard category.

The table below shows a comparison between the old EU DSD classification, which was discontinued in 2009 but whose data are still used, and the new European CLP (Classification-Labelling-Packaging) classification, as well as the new international GHS (Global Harmonisation System) classification for oral LD50. An identical table is available for all routes of administration.

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