Tetrakis[[2,2',2''-nitrilotris[ethanolato]](1-)-N,O]zirconium

Short-term toxicity to fish

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

short-term toxicity to fish

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.

Reference 2

Endpoint:

short-term toxicity to fish

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: not specified

GLP compliance:

not specified

Analytical monitoring:

not specified

Vehicle:

not specified

Test organisms (species):

Pimephales promelas

Test type:

static

Water media type:

freshwater

Key result

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

ca. 11 800 mg/L

Nominal / measured:

meas. (not specified)

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Validity criteria fulfilled:

yes

Conclusions:

The 96 hr LC50 for triethanolamine was 11800 mg/L tested on Pimephales promelas.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish

Effect concentration:

11 800 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).