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EC number: 283-829-2
CAS number: 84731-70-4
The available information shows that the substance is not classified
with any hazards and substance properties gives rise to predict no
effect concentrations which are undemanding andas such the chemical
safety assessment should conclude safe use of the material.
With this in mind, long-term sediment testing on the substance is
considered not necessary.
According to Regulation (EC) No. 1907/2006, Annex X, Section 9.5.1
Column 2: Long-term toxicity testing shall be proposed by the registrant
if the chemical safety assessment according to Annex I indicates the
need to investigate further the effects on sediment organisms. The
substance is not classified for any hazards and hence a Chemical Safety
Report is not required. Hence there is currently no significant concern
for long term effects in sediment organisms.
In addition to this primary argument (the absence of any hazard
classification), key elements of the substance properties are examined
to develop a secondary argument.
1) Biodegradation: While the substance is not readily biodegradable it
is inherently biodegradable and hence not persistent in environmentally
significant conditions. Ready Biodegradability test shows 54.1%
degradation after 28 days, which does not fulfil the minimum criteria
set out by the OECD method. This does however indicate T½ was achieved
within 28 days, highlighting the materials propensity for
biodegradation. An inherent biodegradability test shows 80.5%
degradation after 28 days, therefore it is considered that the material
is inherently biodegradable and as such not persistent in
environmentally significant conditions.
2) Partitioning: The substance shows a strong potential to bind to soils
and hence can be predicted to bind to sediment. The log Koc value form
an OECD 121 study was >5.63.
3) Bioaccumulation: Bioaccumulation potential of the substance is
however very low. While the Log Kow was shown to be 8.84, a
bioaccumulation study has shown the mean BCF to be 9. The substance was
shown not to significantly accumulate in fish tissue and was observed to
beeliminated from the fish tissues over a 25 day depuration period.
Based on this information the biological half-life of the test item is
considered to be between 6 to 25 days.
4) Aquatic toxicity: In toxicity tests, the substance displayed no
observable effect on fish, daphnia, algae and microorganisms at the
nominal concentration of 100mg/L. As such the material would not be
considered toxic. The above information gives rise to predicted no
effect concentrations which are undemanding and as such the chemical
safety assessmentshould conclude safe use of the material.
With this biodegradation potential, low bioaccumulation and no
environmental toxicity in mind, long-term sediment testing on the
substance is considered not necessary.
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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