Registration Dossier
Registration Dossier
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EC number: 203-180-0 | CAS number: 104-15-4
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Determination of the potential for bioaccumulation follows Guidance on Information Requirements and Chemical Safety Assessment Chapter R.16: Environmental Exposure Estimation (ECHA, 2012). Chapter R.16 and REACH Annex IX states that there may be bioaccumulation potential if log Kow is >3. Experimentally measured log Kow for ASA Category substances range between -0.96 to 0.41. The likelihood of bioaccumulation is very low and the requirement for further testing is waived.
The substance is not bioaccumulative.
The BCF value has been estimated with BCFBAF v3.01 and for all substances the Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt). This value has been use for the Chemical safety assessment
Key value for chemical safety assessment
- BCF (aquatic species):
- 3.162 L/kg ww
Additional information
One study investigated bioaccumulation of PTSA, whose ring was evenly labelled with 14C, in guppies ( Poecilla reticulata) under semistatic conditions. The fish were exposed in aerated spring water which was renewed each day. During the course of 9 days exposure, at an initial PTSA concentration of 2.91 +/- 0.07 ug/l and a temperature of 22 -23 °C, the absorbtion factor (the ratio of measured radioactivity in the fish to that in the water) remained under 1.
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