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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Endpoint:
short-term toxicity to aquatic invertebrates
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
As the target substance hydrolyses rapidly (half-life < 30 minutes) the intrinsic properties are related to hydrolysis products of the target substance. This information is used as a supporting evidence on the toxicity of the target substance in CSA.
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
other: DIN 38412, Part 11
Principles of method if other than guideline:
Daphnien-Kurzzeittest, DIN 38412 Teil 11, Bestimmung der Wirkung von Wasserinhaltsstoffen auf Kleinkrebse
GLP compliance:
not specified
Test organisms (species):
Daphnia magna
Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
24 h
Duration:
24 h
Dose descriptor:
EC0
Effect conc.:
ca. 1 386 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality
Key result
Duration:
24 h
Dose descriptor:
EC50
Effect conc.:
ca. 1 850 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality
Duration:
24 h
Dose descriptor:
EC50
Effect conc.:
ca. 2 455 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality
Validity criteria fulfilled:
yes
Conclusions:
EC50 of the triethanolamine was tested on Daphnia magna.

Description of key information

No studies were conducted on the target substance, Tetrakis [[2,2',2"-nitrilotris[ethanolato]](1-)-N,O]zirconium. As the target substance hydrolyses rapidly (half-life < 30 minutes) the intrinsic properties are related to hydrolysis products of the target substance.

On the basis that if entering the environmental, this substance will quickly dissociate to form the inorganic (poorly soluble) zirconium dioxide and 2,2',2''-Nitrilotriethanol (triethanolamine). The zirconium dioxide is not considered further in this report as aquatic toxicity assessments do not apply.

Short-term toxicity studies of triethanolamine are well-investigated:

Fish: LC50 (96h), Pimephales promelas, was 11800 mg/l (Geiger, D.L. et al., 1985)

Invertebrates: EC50 (24h) Daphnia magna, was 1850 mg/l (Bringmann 1982)

Algae or cyanobacteria: EC50 (72h),Desmodesmus subspicatus, was 512 mg/l (Aman and Steinhaeuser, 1986)

Microorganisms: IC50 (3h), activated sludge, > 1000 mg/l (Klecka, et al. 1985).

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
1 850 mg/L

Additional information

No studies were conducted on the target substance, Tetrakis [[2,2',2"-nitrilotris[ethanolato]](1-)-N,O]zirconium. As the target substance hydrolyses rapidly (half-life < 30 minutes) the intrinsic properties are related to hydrolysis products of the target substance.

On the basis that if entering the environmental, this substance will quickly dissociate to form the inorganic (poorly soluble) zirconium dioxide and 2,2',2''-Nitrilotriethanol (triethanolamine). The zirconium dioxide is not considered further in this report as aquatic toxicity assessments do not apply.

Short-term toxicity studies of triethanolamine are well-investigated:

Fish: LC50 (96h), Pimephales promelas, was 11800 mg/l (Geiger, D.L. et al., 1985)

Invertebrates: EC50 (24h) Daphnia magna, was 1850 mg/l (Bringmann 1982)

Algae or cyanobacteria: EC50 (72h),Desmodesmus subspicatus, was 512 mg/l (Aman and Steinhaeuser, 1986)

Microorganisms: IC50 (3h), activated sludge, > 1000 mg/l (Klecka, et al. 1985).