Registration Dossier
Registration Dossier
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EC number: 231-197-3 | CAS number: 7446-11-9
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Criterion
PBT criteria
vPvB criteria
Sulphurtrioxide
Criterion
fulfilled?P
Half-life in marine water > 60 d, or
half-life in fresh- or estuarine water > 40 d, or
half-life in marine sediment > 180 d, or
half-life in fresh- or estuarine water sediment > 120 d, or
half-life in soil > 120 dHalf-life in marine, fresh or esturarine water > 60 d, or
Half-life in marine, fresh or esturarine sediment > 180 d, or
half-life in soil > 180 dSulphurtrioxide rapidly hydrolyses in water to form sulphuric acid. Sulphuric acid dissociates readily to hydrogen (hydronium) ions and sulphate ions, both of which are ubiquitous in the environment.trioxide has no potential to persist
no
B
BCF > 2000
BCF > 5000
Sulphurtrioxide rapidly hydrolyses in water to form sulphuric acid. Sulphuric acid dissociates readily to hydrogen (hydronium) ions and sulphate ions, both of which are ubiquitous in the environment.trioxide has no potential to bioaccumulate
no
T
Long-term NOEC for marine or freshwater organisms < 0.01 mg/L
n.a.
Long-term NOEC freshwater fish (flagfish) 0.025mg/L
no
T
CMR
n.a.
Not classified as CMR
T
Other evidence of chronic toxicity, as identified by the classifications: T, R48, or Xn, R48 according to Directive 67/548/EEC
n.a.
Not classified as T, R48, or Xn, R48 according to Directive 67/548/EEC
A substance is identified as a PBT substance if it fulfils all three PBT criteria described above. None of these criteria are fulfilled, and therefore sulphur trioxide cannot be classified as PBT.
A substance is identified as a vPvB substance if it fulfils both vPvB criteria described above. The P and the B criterion are not fulfilled.
Sulphur trioxide is neither a PBT nor a vPvB substance.
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