Registration Dossier
Registration Dossier
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EC number: 200-681-6 | CAS number: 68-22-4
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Norethisterone in a saturated solution (approx. 7.8 mg/L) had no inhibitory effect on the growth of Pseudomonas putida. The growth inhibition of the reference substance was in good agreement with the historical data base of this laboratory.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 7.8 mg/L
Additional information
"Should read: > 7.8 mg/L"
The slight increase of growth is not considered to be relevant in ecotoxicological terms, since the test is not designed to assess growth-stimulating effects.
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