Registration Dossier
Registration Dossier
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EC number: 274-986-8 | CAS number: 70892-34-1
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Ready biodegradability and inherent biodegradability was investigated in well documented studies according to OECD guideline 301F and OECD 302C. The test item was found slightly biodegradable by 11.8% in OECD 301F test. Leuco Sulphur Brown 37 has a high molecular weight (98.98% > 1000 Dalton). Under environmental conditions the substance will be oxidized to very big polymeric structures with a very high molecular weight. The bioavailability of the substance is negligible (low potential to cross biological membranes). Although the criteria for ready biodegradability are not fulfilled the results show that the substance has the potential to biodegrade in the environment.
The ‘P’ criterion according to Annex XIII is fulfilled for environmental compartments.
The log Pow has been calculated based on the solubility of the substance in water and octanol and is < -1.6.
Furthermore, a potential for bioaccumulation can be ruled out because the substance will be oxidized to very big polymeric structures with a very high molecular weight under environmental conditions. The bioavailability of the substance is negligible (low potential to cross biological membranes).
The ‘B’ criterion for Leuco Sulphur brown 37 is NOT fulfilled.
The substance is non toxic to mammalian and aquatic organisms.
The 'T' criterion for Leuco Sulphur brown 37 is NOT fulfilled.
For Leuco Sulphur brown 37 the ‘P’ criteria is fulfilled but the ‘B’ and ‘T’ criteria not. Leuco Sulphur brown 37 is neither a 'PBT' nor a 'vPvB' substance.
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