Cerium gadolinium oxide

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Ongoing

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2022

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 201 (Alga, Growth Inhibition Test)

Version / remarks:

Version: 2011.
Remark: Standard OECD TG 201 but implementing recommendations of OECD Series on Testing and Assessment No. 317: "Guidance document on aquatic and sediment toxicological testing of nanomaterials".

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: OECD Series on Testing and Assessment No. 317: "Guidance document on aquatic and sediment toxicological testing of nanomaterials

Version / remarks:

Version: 2021.
Remark: The recommendations of this guidance were implemented when applying the standard OECD 201 test guideline.

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Cerium gadolinium oxide

EC Number:

953-470-2

Molecular formula:

Gd2CeO5

IUPAC Name:

Cerium gadolinium oxide

Test material form:

solid: nanoform

Sampling and analysis

Analytical monitoring:

yes

Test solutions

Vehicle:

no

Details on test solutions:

The preparation of the stock suspension is based on the recommendations of OECD Series on Testing and Assessment No. 317: "Guidance document on aquatic and sediment toxicological testing of nanomaterials" and on preliminary assays to determine relevant sonication time/amplitude, and concentration.

Test organisms

Test organisms (species):

Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

72 h

Test conditions

Details on test conditions:

The test conditions will be further described when the study will be finished and the study report will become available (see in the field "Overall remarks, attachments" for further information).

Results and discussion

Effect concentrations

Key result

Remarks on result:

other: Results not yet available; see in the field "Overall remarks, attachments" for further information.