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PBT assessment

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PBT assessment: overall result

PBT status:
PBT assessment does not apply

According to Annex XIII of Regulation (EC) No 1907/2006, no PBT and vPvB assessment is needed since triple superphosphate is inorganic. Nevertheless a qualitative assessment has been performed to show that the substance is not PBT.

Persistence Assessment

For inorganic salts, including triple superphosphate, the concept of biodegradation is not applicable in general (OECD, 2001).The degradation pathway is through simple dissociation into phosphates and the corresponding cation (Ca2+).

Bioaccumulation assessment 

Bioaccumulation and secondary poisoning are not considered significant.Simple inorganic salts with high aqueous solubility will exist in a dissociated form in an aqueous solution. Such a substance has a low potential for bioaccumulation.

Toxicity assessment

There are no long-term data available to assess the parent substance according to the definitive criteria for T for the environment. Short term tests were conducted and based on these tests, the test substance can be regarded as acutely not harmful to aquatic organisms. Short term toxicity data of the substance towards fish, daphnia and algae give an EC/LC50 >100 mg/l. The substance is not considered as T for the environment as the available data (E/LC50 > 100 mg/L) do not meet the screening criteria for T for the environment (E/LC50 <0.1 mg/L).Moreover, the test substance is not classified according to Directive 67/548/EEC and Regulation (EC) No. 1272/2008 (2nd ATP). Thus, the criteria set out in Annex XIII of Regulation (EC) No. 1907/2006 are not met and the test substance is not considered to meet the T criterion.

Triple superphosphateis not classified as carcinogenic, mutagenic or toxic for reproduction nor is there any evidence of chronic toxicity according to Directive 67/548/EEC and Regulation (EC) No 1272/2008. Therefore,triple superphosphatedoes not meet the T criterion.

Emission Characterisation

Not relevant, since the substancedoes not fulfil the PBT / vPvB criteria.

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