Registration Dossier
Registration Dossier
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EC number: 811-484-5 | CAS number: 680972-33-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
There are no biodegradation studies for ammonium cumenesulphonate but there are other studies on the Hydrotropes category members. All the OECD 301B demonstrate that the hydrotropes are readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Ammonium cumenesulphonate is a member of the Hydrotropes Category, which comprises substances used to solubilise complex formulas in water. It is structurally related to the substances of the OECD SIDS Hydrotropes category, comprising three sub-groups: the methyl, dimethyl and methylethyl benzene sulphonates (or the toluene, xylene and cumene sulphonates). In addition, there are differences in counter ions (i.e. Na+, NH4+ and Ca++) in commercial hydrotropes. The chemical reactivity of the different counter ions is not expected to significantly influence the physical and chemical behaviour of the compounds with regard to environmental fate, ecotoxicity and mammalian toxicity. The presence of one or two methyl groups or a methylethyl group on the benzene ring is not expected to have a significant influence on chemical reactivity. As defined in the ‘Read-Across Justification Document’ section 13, data provided for this category are representative of ammonium cumenesulphonate and suitable for assessment purposes. Experimental data for the Hydrotrope category has been evaluated and trends in the environmental fate of these hydrotopes were used to meet the requirements for the biodegradation endpoint.
It is concluded that given the similarity between ammonium cumenesulphonate and the hydrotrope substances tested using the OECD biodegradation test guidelines, as well as similar physico-chemical properties and structure, it is fully expected that ammonium cumenesulphonate is readily biodegradable. The key study, supported by a number of biodegradation studies using hydrotropes, confirms that the hydrotrope category substances are readily biodegradable. In addition, the OECD SIDS Report (2006) for the hydrotropes category concluded that “studies across the hydrotropes category demonstrate rapid and complete biodegradation under aerobic conditions and the hydrotopes are considered to be readily biodegradable according to OECD criteria”. The OECD SIDS Report conclusion supports the experimental evidence provided.
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