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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Sediment toxicity

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Administrative data

Link to relevant study record(s)

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Endpoint:
sediment toxicity: short-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Endpoint:
sediment toxicity: long-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:

Description of key information

The HYDROTOPES Category comprises the following 6 substances:
STS - Sodium toluene 4-sulphonate (CAS 657-84-1, EC 211-522-5)
SXS - Sodium (xylenes and 4-ethylbenzene) sulphonate (EC 701-037-1)
NH4XS - Ammonium (xylenes and 4-ethylbenzene) sulphonate (EC 943-024-5)
SCS - Sodium p-cumenesulphonate (CAS 15763-76-5, EC 239-854-6)
KCS - Potassium p-cumenesulphonate (CAS 164524-02-1, EC 629-764-9)
NH4CS - Ammonium p-cumenesulphonate (CAS 680972-33-2, EC 811-484-5) 
In addition CaXS (Calcium Xylenesulphonate, CAS 28088-63-3, EC 248-829-9) was evaluated for complete the assessment despite it is not registered under REACH.


The members of the hydrotrope category are all readily biodegradable with low logPow. It can be assumed that they will be completely biologically degraded within the STP process. Therefore tests on sediment organisms are not provided. Since the physicochemical data indicate that the substances are unlikely to be bioaccumulative (low log Kow), a significant distribution into the sediment compartment and a significant exposure of sediment organisms is not expected. Hence, information about effects on sediment organisms is not required. For the purposes of the risk assessment, PNEC aqua are converted to PNEC sediment using the equilibrium partitioning method.

Key value for chemical safety assessment

Additional information