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EC number: 947-977-8
CAS number: -
diisobutylnaphthalenesulphonate is like the longer alkyl chain fraction
of aromatic hydrocarbons, C10-13, reaction products with branched
nonene, sulphonated, sodium salts not expected to be readily
biodegradable. For the half-life's in soil and sediment the default
half-life's as suggested by REACH guidance R.16 will be used for risk
assessment as a worst-case.
biodegradation results as observed for aromatic hydrocarbons, C10-13,
reaction products with branched nonene, sulphonated, sodium salts will
be read across to the structural analogue Sodium
biodegradation potential of aromatic hydrocarbons, C10-13, reaction
products with branched nonene, sulphonated, sodium salts has been
assessed in an inherent test (SCAS test) in combination with Closed
Bottle tests. The results reveal that methylnaphthalenesulphonate, and
part of the isomers of dimethylnaphthalenesulphonate, degrade. The other
constituents are not readily biodegradable. The substance is considered
to be inherently degradable not fulfilling the specific criteria
outlined in the REACH guidance.
substance is expected to be stable in the environment on the basis of
the chemical structure.
bioaccumulation test on aquatic species is waived because the available
information (log Kow and calculated BCF values) is deemed sufficient for
the PBT assessment, classification and labelling and the chemical safety
assessment. The log Kow of 0 and the chemical structure of the substance
suggest a very low bioaccumulation potential. The calculated BCF is 3.16
sorption/desorption data is available for Sodium
diisobutylnaphthalenesulphonate. The sorption data from a structurally
similar substance aromatic hydrocarbons, C10-13, reaction products with
branched nonene, sulphonated, sodium salts (source) is read across to
Sodium diisobutylnaphthalenesulphonate (target).
source substance has a slightly longer alkyl chain than the target
substance; Sodium diisobutylnaphthalenesulphonate and is therefore
expected to have a slightly stronger sorption. The use of the Koc of the
source substance aromatic hydrocarbons, C10-13, reaction products with
branched nonene, sulphonated, sodium salts can therefore be considered
as a worst-case approach (will lead to higher PECsoil and sediment
log Koc of aromatic hydrocarbons, C10-13, reaction products with
branched nonene, sulphonated, sodium salts of 3.5 was experimentally
determined in an adsorption/desorption study according to OECD Guideline
121 under GLP conditions
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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