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EC number: 292-697-5
CAS number: 90989-41-6
ecotoxicology studies are available for streams within the High Benzene
Naphthas as detailed below. These
were all proprietary studies. The
most sensitive endpoint was a 96 hr LL50 of 1.1 mg/L. This
was a GLP compliant study which followed a standard guideline. It is
considered reliable and suitable for use as a key study.
data provided for this Category was generated via use of WAFs. Deriving
PNEC’s for UVCB substances based on WAF information is inappropriate.
PNECs were derived using the PETROTOX v.3.05 model as implemented in Petrorisk.The
hydrocarbon block method is used for environmental risk assessment (see
REACH guidance, R7, app.13-1). PNECs for hydrocarbon blocks have been
derived using the HC5 statistical extrapolation method and the target
lipid model using representative structures.
The complete results of this evaluation are
found in the Petrorisk Output Annex.
the large database of organisms included in the target lipid model, an
assessment factor of one has been applied to the HC5.
on the acute aquatic toxicity of 2 members of this category (CAS Numbers: 68513-69-9;
68921-67-5) were obtained from proprietary sources. No
data was identified in the published literature. The
data from these streams have been read across to the other category
studies were conducted to standard guidelines and according to GLP and
so are considered fully reliable for use as key/supporting studies. Authors
report the LC50 based on nominal loading rates (WAF) and mean measured
the test substance is a hydrocarbon stream with various components
reporting a measured concentration could be misleading as the measured
concentration does not relate to a concentration of the raw stream. Instead
we have used the results reported as WAF, which better represent the
potential toxicity of the test substance. Similar
sensitivity was found in all three trophic levels (fish 96 hr LL50 range
1.1 -5.6 mg/L; invertebrates
48hr EL50 1.2 -2.3 mg/L; algae 72 hr ErL50 range 2.2-2.3 mg/L)
data can be used for comparison with the criteria for environmental
classification under the CLP Regulation. However,
its use must be considered carefully. Based
on the available data (96 hr LL50 1.1 mg/L WAF) streams in this category
should have the classification Chronic 2 under the CLP Regulation.
partition coefficients of three streams in this category have log Kow
ranges from 2.2 to >6.5. Therefore,
the classifications cannot be removed.
on the available experimental data (96 hr LL50 1.1mg/L WAF) streams in
this category should have the classification Chronic 2 under the CLP
the classification of streams in this category may be impacted by other
constituents. Components which may impact the classification should be
identified by the registrants and the impact of their environmental
classification included in the assessment. The classification of each
stream can be determined following the equations given in the notes
the CLP Regulations
applies where: Acute 1 x M ≥ 25 %
applies where: Chronic 1 × M ≥ 25 %
applies where: (M × 10 × Chronic 1) + Chronic 2 ≥ 25 %
applies where: (M × 100 × Chronic 1) + (10 × Chronic 2) + Chronic 3 ≥ 25
applies where: Chronic 1 + Chronic 2 + Chronic 3 + Chronic 4 ≥ 25 %
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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