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EC number: 250-705-4
CAS number: 31566-31-1
The chemical safety assessment according to Annex I of Regulation (EC) No. 1907/2006 does not indicate the need to investigate further the toxicity to terrestrial plants.
No experimental data evaluating the toxicity of Stearic acid,
monoester with glycerol (CAS No. 31566 -31 -1) to terrestrial plants are
available. The test substance is characterized by a log Kow (> 5)
indicating high potential for adsorption to soil particles. Tests with
soil-dwelling organisms that feed on soil particles are therefore most
relevant for the evaluation of soil toxicity Stearic acid, monoester
with glycerol (Guidance on information requirements and chemical safety
assessment, Chapter R7.c (ECHA, 2012)). Due to the low water solubility
(< 1 mg/L) and high adsorption potential of this substance, it is not
expected to be found in the soil pore water, and uptake by plants is
therefore highly unlikely. On the other hand, the Guidance on
information requirements and chemical safety assessment, Chapter R7.c
states that earthworm testing allows potential uptake via surface
contact, soil particle ingestion and pore water, while plant exposure
will be largely via pore water (ECHA, 2012). Therefore, earthworm was
chosen as the most suitable organism to assess the terrestrial toxicity
of this substance. Earthworm toxicity data from a suitable read-across
substance (Glycerides, C14-18 and C16-18 unsatd. mono-, di- and tri-
(CAS No. 91052-28-7) in accordance with Regulation (EC) No. 1907/2006,
Annex XI, 1.5) are available. In this test performed according to OECD
207, no effects on survival or biomass of Eisenia fetida were reported,
leading to a NOEC (14 d) ≥ 1000 mg/kg dw (Moser, 2013). Stearic acid,
monoester with glycerol is readily biodegradable. Therefore, rapid and
ultimate degradation in the environment, including soil, can be
expected. Chronic exposure of terrestrial organisms is thus very
Based on the available information, the chemical safety assessment
according to Regulation (EC) No. 1907/2006, Annex I, does not indicate
the need to conduct further tests on terrestrial plants.
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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