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EC number: 700-071-4
CAS number: 932742-30-8
Due to rapid hydrolysis of SIKA Hardener LI (see: Section 5.1.2 on hydrolysis study) upon contact with water, measurement of the partition coefficient of SIKA Hardener LI was technically not feasible. Instead the log Pow of the hydrolysis product were determined. The log Pow of the hydrolysis product was determined to be log Pow 7.41.
In accordance with column 2 adaptation
statement of Annex VII Regulation (EC) No 1907/2006 (REACH), the
determination of the partition coefficient (as required in section 7.8
of Annex VII) the study does not need to be conducted as the substance
decompose (fast hydrolysis) during the performance of the test. Thus the
experimental determination was replaced by an appropriate calculation
method. Please refer to IUCLID section 5.1 for more details about
Using KOWWIN v.168 the log Kow of SIKA
Hardener LI was calculated to be 16.97 at 25 °C (EPI Suite, 2014). The
substance is not within the applicability domain of the model. Therefore
the estimation may be less accurate. The QMRF and QPRF documentation are
attached to the respective study record.
The partition coefficient
(n-octanol/water) of the first hydrolysis product (Aldehyde L) of the
test item was assessed in accordance with OECD guideline no. 117, EU
method A.8 and OPPTS 830.7570 guideline. In the course of this study the
partition coefficient (Pow) of Aldehyde L was determined using high
performance liquid chromatography. Retention times of components of
Aldehyde L are higher than the last eluting standard (DDT); therefore an
accurate value of log Pow could not be given. The extrapolated log Pow
value calculated for Aldehyde L (peak 1, retention time: 12.56 minutes)
and Aldehyde L (peak 2, retention time: 13.53 minutes) are 7.20 and
Furthermore s study was conducted
according to Regulation (EC) 440/2008 Part A A.8 to determine the logPow
of the second hydrolysis product of the test item. Using the shake flask
method the log Pow was determined to be 0.99 at 23 °C.
In conclusion the logPow of the first
hydrolysis product was regarded as worst case. Consequently a logPow of
7.41 was chosen as key value for chemical safety assessment.
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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