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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Reference
Endpoint:
long-term toxicity to aquatic invertebrates
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
Please refer to the Analogue Justification provided in IUCLID section 13.
Reason / purpose:
read-across source
Duration:
21 d
Dose descriptor:
NOEC
Effect conc.:
>= 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Remarks:
loading rate (WAF)
Basis for effect:
reproduction
Remarks on result:
other:
Remarks:
source, RA-A, CAS 68604-38-6 , REAGENS, 2012, Daphnia magna, 21 d, RL1

Description of key information

No chronic effects up to the limit of water solubility; read-across.

Key value for chemical safety assessment

Additional information

No study investigating the long-term toxicity of Octadecanoic acid, ester with 2,2'-[oxybis(methylene)]bis[2- (hydroxymethyl)-1,3-propanediol] (CAS 70969-57-2) to aquatic invertebrates is available. Therefore, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 a read-across to the structurally related source substance Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) is applied.

Based on the high degree of similarity between the structural and physico-chemical properties of the target and source substance, the source substance is considered a suitable representative for the evaluation of the long-term toxicity of the target substance to aquatic invertebrates. The read-across approach is justified in detail within the analogue justification in IUCLID section 13.

The study investigated the chronic toxicity of Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) to aquatic invertebrates according to OECD guideline 211.Daphnia magnawere exposed to the test substance in a semi-static test system. The water accommodated fraction (WAF) was used for the preparation of the test solutions. During the exposure period of 21 days the mortality and reproduction rate of the test animals was recorded. The substance affected neither the survival rate nor the reproduction rate ofDaphnia magna. The highest tested concentration of 100 mg/L (loading rate) was determined as NOEC (NOEC (21 d) ≥ 100 mg/L). Thus toxic effects of Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) were not observed within the limit of water solubility.

Based on the available results from a structurally related source substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5) which are characterized by a similar ecotoxicological profile and comparable structure, it can be concluded that Octadecanoic acid, ester with 2,2'-[oxybis(methylene)]bis[2- (hydroxymethyl)-1,3-propanediol] (CAS 70969-57-2) will not exhibit long-term effects to aquatic invertebrates up to the limit of water solubility.