Registration Dossier
Registration Dossier
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EC number: 248-468-7 | CAS number: 27458-90-8
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
A read-across is proposed to fulfil the requirements of PBT/vPvB assessment between di-tert-dodecyl polysulfides (TPS) and di-tert-dodecyl disulfide (DTDDS). TPS and DTDDS are not readily biodegradable. TPS is very persistent in the sediment compartment (DT50 > 180 days at 20°C). By analogy, DTDDS is also considered very persistent in the sediment compartment. Both substances are therefore P/vP according to criteria of annex XIII of REACH regulation EC 1907/2006. TPS and DTDDS both have a log Kow value of 12.5, which indicates that they should not have a high potential for bioaccumulation. This was confirmed in a bioconcentration study in fish for TPS (BCF = 0 L/kg). TPS is therefore not B/vB according to criteria of annex XIII. By analogy, DTDDS is not considered B/vB either. As a conclusion, TPS and DTDDS are not PBT and not vPvB according to criteria of annex XIII of REACH regulation EC 1907/2006.
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