Registration Dossier
Registration Dossier
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EC number: 231-116-1 | CAS number: 7440-06-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no hazard identified
Marine water
- Hazard assessment conclusion:
- no hazard identified
STP
- Hazard assessment conclusion:
- no hazard identified
Sediment (freshwater)
- Hazard assessment conclusion:
- no hazard identified
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no hazard identified
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential to cause toxic effects if accumulated (in higher organisms) via the food chain
Additional information
Direct ecotoxicity testing of poorly soluble metal substances is not appropriate, instead the standard approach for assessing the toxicity of poorly soluble metals is to compare the release of metal ions in transformation / dissolution (TD) tests conducted at different loading rates and for different time periods, with acute and chronic environmental reference values (ERVs) for a soluble form of the metal. This approach is used to classify platinum metal, and direct testing of platinum itself has not been conducted.
Conclusion on classification
Classification of poorly soluble metal substances is conducted by comparing the results from 7 and 28-day transformation / dissolution (TD) tests against acute and chronic environmental reference values (ERVs). For platinum substances the ERVs are based on ecotoxicity data for hexachloroplatinic acid, as the most toxic platinum substance. The acute and chronic ERVs for hexachloroplatinic acid are 20 and 7 µg Pt L-1, respectively (based on a 48-hour Daphnia EC50 value and a 21-day Daphnia NOEC value).
The results of the definitive TD test with platinum showed 0.01 and 0.08 µg Pt L-1 after 7 days at loading rates of 10 and 100 mg L-1, and 0 µg Pt L-1 after 28 days at a loading rate of 1 mg L-1. Some of these results are <LOQ (0.1 µg Pt L-1 for the 28-day test and 0.01 µg Pt L-1 for the 7 day tests) therefore in these cases 0.5 x LOQ has also been compared against the ERV in order to assess classification. As the TD test results are not above the acute or chronic ERV, platinum is not classified for the environment.
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