Pressure is building on the US and Japan to abandon the LD50
toxicity test. The test, which involves finding the dose of a chemical needed to
kill half a population of laboratory animals, has long been attacked as cruel
and unnecessary. The two countries are now the only major industrialised nations
which still require the test as part of standard toxicity testing for new
chemicals. Last month, Britain said it would no longer issue licences to conduct
LD50 tests where alternatives are available.
More from Â鶹´«Ã½
Explore the latest news, articles and features
Popular articles
Trending Â鶹´«Ã½ articles
1
Neanderthal infants were enormous compared with modern humans
2
Exclusive report: Inside Chernobyl, 40 years after nuclear disaster
3
Largest ever map of universe captures 47 million galaxies and quasars
4
The rise, the fall and the rebound of cyclic cosmology
5
The biggest threat to Chernobyl is no longer radiation
6
Electric vehicle owners could earn thousands by supporting power grid
7
The man who crawls into the perilous heart of the Chernobyl reactor
8
Why is it so hard to change your mind?
9
How working out like an astronaut can reduce back pain and slow ageing
10
A key solution to climate change isn't happening – and that's good
