Aluminum magnesium sodium oxide (Al10.33Mg0.67Na1.67O17)

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February 03,2017 - March 17,2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Aluminum magnesium sodium oxide (Al10.33Mg0.67Na1.67O17)

EC Number:

807-888-6

Cas Number:

110621-40-4

Molecular formula:

Al10.33Mg0.67Na1.67O17

IUPAC Name:

Aluminum magnesium sodium oxide (Al10.33Mg0.67Na1.67O17)

Sampling and analysis

Analytical monitoring:

yes

Details on sampling:

The test solutions were collected from each loading rate, the negative control and the WSF control at test initiation and at test completion.

Test solutions

Vehicle:

no

Details on test solutions:

The test item is a difficult item as defined by the OECD Guideline 23 (2000) because it isa multicomponent substance with low water solubility. In order to maximise the amount of test item in solution, the test solutions were prepared as water soluble
fractions (WSF) using the methodology described below.
Water soluble fractions (WSFs) were prepared at 6.25, 12.5, 25, 50, and 100 mg/Lnominal loading rates and tested alongside a negative control and a WSFcontrol.

Test organisms

Test organisms (species):

Daphnia magna

Details on test organisms:

In‐house culture; original culture was obtained from Aquatic BioSystems (Fort Collins, CO) in April 2016(identified by EcoAnalysts Inc. on March 10, 2016 as D.magna)

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Test conditions

Hardness:

88 mg/L CaCO3

Test temperature:

21.9 °C

pH:

8.2

Dissolved oxygen:

8.6 mg/L

Conductivity:

313 µS/cm

Nominal and measured concentrations:

Nominal loading rates of the test item: 6.25, 12.5, 25.0, 50.0 and 100 mg/L
Measured Loading Rates of Aluminium: 0.02, 0.07, 0.14, 0.28 0.53 mg/L

Results and discussion

Effect concentrations

Effect concentrations 1

Key result

Duration:

48 h

Dose descriptor:

EL50

Effect conc.:

75.17 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Effect concentrations 2

Key result

Duration:

48 h

Dose descriptor:

NOELR

Effect conc.:

50 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility