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EC number: 609-066-0
CAS number: 35123-06-9
A valid OECD study in Avena sativa, Brassica napus and Vicia sativa is available using the following test concentrations : 62.5, 125, 250, 500 and 1000 mg/kg dry weight. An influence to emergence ws not observed resulting in a NOEC > 1000 mg/kg soil dw for all three species. The influence on growth was determined to be : NOEC =250 mg/kg soil dw. and the influence on dry weight was NOEC = 62.5 mg/kg soil dw.
The test substance was mixed via aliquots of a test substance stock
solution with natural soil (sandy loam) in the test concentrations 62.5,
125, 250, 500 and 1000 mg/kg dry weight. The water content in the test
was about 40 % of the maximal water holding
capacity of the soil. The test system Avena sativa, Brassica napus and
Vicia sativa were sowed in the test pots in four replicates per test
concentration. The test pots were incubated in a test chamber at
19.6-20.8°C, 65.1-72.5% relative humidity and a day/night
light rhythm of 16/8 hours. The test pots were watered daily and the
position of the test pots in the test chamber was randomized daily also.
The number of the emerged seedlings was recorded for the exposure period
of 21 days. After 16 days 50 per cent of the seedlings had been emerged
in all control assays, all plants were harvested.
The emergence rates of the seed, dry weight, shoot length of the plants
at the end of the exposure period were determined as test criteria and
given as EC10, EC25, EC50 (effect concentration with confidence limits)
and NOEC. Additional morphological changes were evaluated.
An influence to emergence rate caused by the test substance was not
observed. However during the course of the exposure period clear effects
to the development of the plants of all species were observed. The
growth of the plants was effected by increasing
concentrations. The plants of oil seed rap begin to die in the highest
test concentration. The plants of oat show with increasing test
concentrations a reduced growth and changes at leaves. The clearest
effects were observed at oilseed rape and vetch at the parameter formed
bio mass expressed as dry weight. The test substance has an influence to
the early stage of development all the tested species at the higher test
concentrations has an influence to the early stage of development all
the tested species at the higher test concentrations.
As laid down in the "Endpoint Spefic Guidance" Chapter R.7.c
(Terrestrial Pant Test), data from an OECD 208 test covering the
sensitive stage in the life-cycle of a plant can be uses as estimates of
chronic toxicity. Therefore, the received data are considered as long
term results in the context of the derivation of PNEC soil.
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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