Residues, copper-iron-lead-nickel matte, sulfuric acid-insol.

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Automatic calculation with MeCLas tool

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

other: software

Title:

Unnamed

Year:

2013

Materials and methods

Principles of method if other than guideline:

Aquatic toxicity of the UVCB substance was determined by classifying based on mixture rules from EU CLP (Tier 1: summation of classified components or Tier 2: additivity of soluble components to derive Hazard class) and back calculation to the corresponding L(E)C50 range.

Test material

Test material information

Constituent 1

Reference substance name:

Matte leaching residue 1, 2, 3

IUPAC Name:

Matte leaching residue 1, 2, 3

Details on test material:

Reasonable worst-case across industry, as reported in Section 1.2.
Representative sample for mineralogical information is provided in IUCLID Section 4.23.

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Not applicable

Sampling and analysis

Analytical monitoring:

not required

Details on sampling:

Not applicable

Test solutions

Vehicle:

not specified

Details on test solutions:

Not applicable

Test organisms

Details on test organisms:

Not applicable

Study design

Test type:

not specified

Water media type:

not specified

Post exposure observation period:

Not applicable

Test conditions

Hardness:

Not applicable

Test temperature:

Not applicable

pH:

Not applicable

Dissolved oxygen:

Not applicable

Salinity:

Not applicable

Nominal and measured concentrations:

Not applicable

Details on test conditions:

Not applicable

Reference substance (positive control):

not required

Results and discussion

Effect concentrations

Duration:

72 h

Dose descriptor:

EC50

Effect conc.:

< 1 mg/L

Nominal / measured:

estimated

Conc. based on:

test mat.

Basis for effect:

other: most sensitive species

Details on results:

Not applicable

Results with reference substance (positive control):

Not applicable

Reported statistics and error estimates:

Not applicable

Any other information on results incl. tables

According to MeClas, the substance is classified as aquatic acute 1 under CLP.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

Good quality estimate of the L/EC50 of the UVCB substance.
The substance is classified as aquatic acute category 1 resulting in an L(E)C50 < 1 mg/L.

Executive summary:

The study provided a conservative estimate of the effect concentration, derived on basis of the classification outcome (mixture toxicity rules) from a reasonable worst-case sample of the substance using mineralogical information from the representative sample. 

 

Validity of the model used:

1. Defined endpoint: The endpoint is a REACH compliant defined endpoint

2. Unambiguous algorithm: EU CLP guidance based summation formula to determine classification, followed by back-calculation to related hazard criteria

3. Applicability domain: Applicable to classify complex metal containing materials

4. Mechanistic interpretation - metal species: The tool translates the elemental composition into a mineralogical composition relevant for classification