Registration Dossier
Registration Dossier
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EC number: 235-185-9 | CAS number: 12125-01-8
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
A number of fumigation studies are reported in the EU RAR on Potassium fluoride.
One 6 year field study is also available on ammonium sulphate.
Key value for chemical safety assessment
Additional information
On the basis of a large number of fumigation experiments with plants (ornamental crops, fruit crops and conifers) exposed to HF, a relationship was derived between the NOEC and exposure time (all plant species). NOEC values were calculated for highly sensitive, sensitive and slightly sensitive plant species. NOEC values of between 0.2 - 7.5 mg/m³ HF are reported for plant species (EU RAR, 2001).
The 6 year effect of ammonium sulphate spread as a solid fertilizer was investigated in a stand of trees (Picea abies, 12 years old at the beginning of the test) in southern Sweden (Rosengren-Brinck and Nihlgard, 1995). Spreading at 471 kg ammonium sulphate (calculated from 100 kg N) per ha per year affected resistance to drought, which was evident in a reduction in the flushing of new shoots. This effect can be explained by salt effects.
These studies cannot allow us to derive an EC50 or a NOEC with relevant units.
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