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EC number: 205-055-6
CAS number: 132-27-4
According to Annex VII of Regulation (EC) No 1907/2006 the
generation of soil data is not required. Experimental data on the
toxicity of sodium 2-biphenylate (CAS 132-27-4) to terrestrial
arthropods is not available.
The assessment of terrestrial toxicity is based on read across data
available for 2-phenylphenol (CAS 90-43-7), the conjugate acid of sodium
2-biphenylate (CAS 132-27-4). Data are available for three trophic
levels. In an earthworm test the effects of the source substance
2-phenylphenol (CAS 90-43-7) onEisenia fetidawere investigated.
The LC50 value was 198.2 mg test item/kg dw. The NOEC for mortality as
well as the NOEC for biomass was determined to be 125 mg test item/kg dw.
The effects of the source substance 2-phenylphenol (CAS 90-43-7)
on terrestrial plants were studied in three plant species of three
different families:Brassica napus, Glycine maxandAvena sativa.
Test parameters were germination rate, mortality and phytotoxicity.
Phytotoxic effects observed were growth reduction (all species), slight
chlorosis (Brassica napusandGlycine max) and slight
necrosis (all species). Additionally,Brassica napusshowed
abnormal growth of the leaves, andGlycine maxshowed abnormal
growth of the leaves and the stems.
The most sensitive species in terms of fresh weight wasAvena
sativawith EC50 value of 53.9 mg/kg soil dry weight and NOEC 12.5
mg/kg soil dry weight. It was followed byBrassica napus(EC50 62.9
and NOEC 25 mg/kg soil dry weight). The least sensitive species wasGlycine
maxwhich showed an EC50 value of 89.7 and NOEC 25 mg/kg soil dry
Furthermore, the effects the source substance 2-phenylphenol on
soil nitrification of soil micro-organisms were tested over an exposure
period of 100 days. The NOEC of 2-phenylphenol (CAS 90-43-7) was
calculated to be 300 mg/kg soil dry weight 28 days and 100 days after
application. The EC50 was calculated to be 633.5 mg/kg and 829.1 mg/kg
soil dry weight 28 days and 100 days after application, respectively. In
an additional test on soil respiration and nitrification, 2-phenylphenol
(CAS 90-43-7) had no impact on respiration and nitrogen transformation
of soil microflora when applied up to 1.0 mg a.i./kg soil.
The source and the target substance are considered as readily
biodegradable and are characterised by a low adsorption potential. Thus,
the exposure of terrestrial organisms like terrestrial arthropods is
considered to be low. Since only very small amounts of the substances
are expected to reach the soil and the available data on microorganisms,
terrestrial plants and earthworms are sufficient for the risk
assessment, no further testing is required.
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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