What is the WHO LD50 of ibuprofen in rats?
The World Health Organization (WHO) does not publish a single, universal “LD50 of ibuprofen in rats.” LD50 values come from toxicity studies run by researchers or manufacturers, and they can vary by experimental conditions (rat strain, route of exposure such as oral vs. intraperitoneal, study design, and the formulation used). WHO databases often summarize or refer to such data rather than provide one fixed LD50 number for all cases.
Which LD50 value should people mean (route matters)?
If you search “ibuprofen LD50 rats WHO,” you may be mixing two different concepts:
- Oral LD50 (most common for ingestion scenarios)
- LD50 by another route (e.g., intraperitoneal)
Different routes produce different LD50 values, so any quoted number needs a route and study context.
Can I find an authoritative WHO table for it?
To give an exact WHO-referenced LD50 number, I would need the specific WHO document or dataset you’re referring to (for example, a particular WHO chemical safety guide or e-waste/chemical hazard listing). With only the question as written, there’s no way to verify which WHO entry you mean, and WHO does not itself guarantee one “the” LD50 figure.
What I can do next
If you share the WHO link, document title, or screenshot of the table/entry you saw, I can extract the exact LD50 value and quote it with the associated route (and any other conditions WHO lists).
Sources
No WHO-specific source link or excerpt was provided in your prompt to verify an exact “WHO LD50” number.