Registration Dossier
Registration Dossier
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EC number: 916-540-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Aquatic Chronic 3 (H412), according to the CLP Regulation (EC) No 1272/2008.
Additional information
Adequate chronic toxicity data is not available for Acid Orange 127, therefore the aquatic toxicity assessment and classification are based mainly on the short-term toxicity available information.
Acid Orange 127 has a log Kow lower than 4, indicating a low potential for bioaccumulation and it is expected to be not rapidly degradable.
According to the CLP Regulation (EC) No 1272/2008, acute aquatic toxicity is normally determined using a fish 96-hour LC50, a crustacean species 48-hour EC50 and/or an algal species 72- or 96-hour EC50; nevertheless it is also specified in the Regulation that data on other species (e.g. Lemna spp.) shall also be considered if the test methodology is suitable. These species cover a range of trophic levels and taxa and are considered as surrogate for all aquatic organisms.
Reliable data is available for invertebrates (Daphnia magna) and aquatic plants (Lemna minor); unfortunately, a reliability cannot be assigned to the available fish information, thus it has not been considered for the classification purpose.
The outcomes of the tests performed on two trophic levels suggest that invertebrate is the most sensitive species, thus the classification should be based on the related data.
No L(E)C50 value was recorded at concentration equal/lower than 1 mg/l, thus the classification criteria for acute (short-term) aquatic hazard (category 1) of the CLP Regulation (EC) No 1272/2008 are not met.
On the basis of the short-term toxicity data on two out of three trophic levels, effects were recorded in the range of 10 - 100 mg/l; therefore, the substance can be classified as hazard to the aquatic environment in category 3 (H412), according to the CLP Regulation (EC) No 1272/2008.
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