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Environmental fate & pathways

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Description of key information

A preliminary test (Tier 1) was performed for the determination of the rate of hydrolysis of di C8-C10, branched, C9 rich, alkylnaphthalene sulphonic acid (DNNSA) at pH values normally found in the environment (pH 4-9). At each pH value a degree of hydrolysis of < 10% was observed after 5 days. According to the guideline, performance of the main study (Tier 2) was not required.

The half-life time of the test substance at 25°C is > 1 year at the pHs tested.

Additional information