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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The toxicity of polysulfide di-tert-nonyl to micro-organisms has been read across from polysulfide di-tert-dodecyl. The study attempts to test an insoluble substance in different types of solutions.  No effect concentrations ranged from 10mg/L (solvent added) to 10000 mg/L (ultrasonic method); direct addition of polysulfide in the GST middle culture did not determine an inhibitory effect up to a dose of 10 g/L but found that bacterial growth was superior to that of controls.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
10 g/L

Additional information

The toxicity of polysulfide di-tert-nonyl to micro-organisms has been read across from polysulfide di-tert-dodecyl. Hervouet (1989) is 16 hour, freshwater study on Pseudomonas putida following the method ISO/TC 147/SC 5 WG 1(N111). Due to the low solubility of the substance several solutions were prepared, leading to a range of No Effect Concentrations from 10mg/L to 10 g/L. The study is considered suitable for use for this endpoint.