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EC number: 248-698-8 | CAS number: 27859-58-1
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
According to the ECHA guidance on PBT/vPvB assessment (draft version 3.0, 2017) 2-(C12-rich-branched olefins from propene oligomerization)-1,4-butanedioic acid commonly known as (tetrapropenyl)succinic acid is regarded as being potentially persistent (P) or very persistent (vP) and bioaccumulative (B). However, there is not sufficient data to determine if the substance fulfils or not the toxicity (T) criteria.
Persistence Assessment
The OECD 301 F test conducted determined that the substance is not readily biodegradable. According to Table R.11 – 4 of the ECHA guidance on PBT/vPvB assessment (draft version 3.0, 2017), the substance can be therefore regarded as being potentially persistent (P) or very persistent (vP).
Bioaccumulation Assessment
Log Kow values were calculated for each of the constituents of the test substance (i.e.(tetrapropenyl)succinic acid). These values ranged from 3.2863 (for (E)-2-(nonenyl)butane-1,4-dioic acid) to 6.0859 (for (E)-2-(pentadecenyl)butane-1,4-dioic acid). Since all of the constituents are present in variable ranges in the test substance, the log Kow values were normalized to 100% based on the highest values of the percentages ranges for all constituents; the resulting weighted average log Kow is 4.76 (see table below).
Therefore, based on the log Kow of 4.76,(tetrapropenyl)succinic acid is potentially bioaccumulative (B) or very bioaccumulative (vB) as the log Kow is greater than the trigger value of 4.5 (ECHA guidance on PBT/vPvB assessment, draft version 3.0, 2017).
Constituent common name
Percentage range [%]
Log Kow
Maximum adjusted percentage [%]
Adjusted
log Kow contribution
(tetrapropenyl)succinic acid
50-85
4.6861
53.46
2.51
(nonenyl)succinic acid
0-2
3.2863
1.26
0.04
(decenyl)succinic acid
3-7
3.7774
4.40
0.17
(undecenyl)succinic acid
10-25
4.2685
15.72
0.67
(tridecenyl)succinic acid
0-20
5.1772
12.58
0.65
(tetradecenyl)succinic acid
0-15
5.6683
9.43
0.53
(pentadecenyl)succinic acid
0-5
6.0859
3.14
0.19
Weighted average
4.76
No bioaccumulation experimental studies are known to have been undertaken. Therefore EPI Suite has been used to estimate the Bioconcentration Factor (BCF) based on theconstituents’ Log Kow values(which ranged from 3.2863 (for (E)-2 -(nonenyl)butane-1,4-dioic acid) to 6.0859 (for (E)-2-(pentadecenyl)butane-1,4-dioic acid).
BCF estimations were greatest using the Arnot-Gobas method (upper trophic) (compared to the regression based method). Therefore, based on the Arnot-Gobas (upper trophic) estimated BCFs (shown in the table below), it can be concluded that (tetrapropenyl)succinic acid meets the B criteria as the fish BCF is greater than 2000 for (tetradecenyl)succinic acid and (pentadecenyl)succinic acid.
Constituent common name
Log Kow
EPI-Suite calculated BCF [l/kgwwt]
(tetrapropenyl)succinic acid
4.6861
1154
(nonenyl)succinic acid
3.2863
153.7
(decenyl)succinic acid
3.7774
361.7
(undecenyl)succinic acid
4.2685
723.3
(tridecenyl)succinic acid
5.1772
1752
(tetradecenyl)succinic acid
5.6683
2364
(pentadecenyl)succinic acid
6.0859
2734
However maximum values calculated (which ranged from 153.7 to 2734 l/kg wet-wt) indicate that BCF of the any individual component of the substance would not meet the vB criterion (BCF =5000).
Toxicity Assessment
The substance does not demonstrate signs of short term aquatic toxicity in either the studies required as a part of the standard Annex VII and VIII information requirements or any other available information. There are no long term NOEC or EC10 values for marine or freshwater organisms less than 0.01 mg/L, and the substance does not meet the criteria for classification as carcinogenic, mutagenic or toxic for reproduction and there is no evidence of chronic toxicity meeting the criteria for classification in appropriate repeated exposure studies.
Comparison of the available data on the substance against the both the screening criteria and assessment criteria set out respectively in Sections 3.1.3 and 1.1.3 of Annex XIII to the REACH Regulation indicates that the existing data demonstrate a lack of applicable hazard classification and thus (tetrapropenyl) succinic acid does not meet the Toxicity (T) criterion.
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