LD50 is an abbreviation of Lethal Dose 50, which is the amount of a substance per kilogram of body weight that can kill 50% of the test animals when a substance is injected into a test animal.
The unit is LD50 (g/kg), and if 1 LD50 at a time, it means a substance that has a target amount that can kill 1 kg of test animals with 50% probability.
The lower the value, the greater the toxicity to the substance, indicating a dangerous substance.
As a test animal, the human LD50 value is officially unknown because the intake amount of a normal white rat or a poisoned suicide person is analyzed by data.
The LD50 value cannot be presented for diseases such as cancer or inflammation because it is a value that affects exposure to the substance in a short short period of time, not the risk of long-term exposure.
http://whs.rocklinusd.org/documents/Science/Lethal_Dose_Table.pdf
Please refer to the LD50 table in the PDF.
As the title, LD50 was written as the national health indicator of the country.
This means that advanced countries such as the United States and Europe ban pesticides containing the substance with the LD50 value, confirming the possibility that profits in food production pose a health risk.
Of course, each country has different views.
An example is the use of atrazine. In the US, atrazine is used, and in Europe, the use of atrazine is decreasing, so each country chooses the benefit of food production or the possibility of threatening health through pesticides. Depends on whether you do.
You can read this post translated in korean : https://biostudy.tistory.com/15
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