Resin acids and Rosin acids, calcium salts

Long-term toxicity to aquatic invertebrates

Administrative data

Endpoint:

long-term toxicity to aquatic invertebrates

Type of information:

experimental study planned (based on read-across)

Study period:

The study will be conducted following acceptance of this testing proposal

Justification for type of information:

A discussion and report on the read across strategy is given as an attachement in Section 13.
A data matrix of the category is attached below.

TESTING PROPOSAL ON AQUATIC INVERTEBRATES
TEST PROPOSAL FOR ANNEX IX ENDPOINT
The long-term testing on aquatic invertebrates (Daphnia magna) testing proposal is submitted along with the long-term testing on fish (FELS test) testing proposal for a tiered experimental approach. This approach starting with long-term testing on invertebrates, followed by fish testing (depending on the results) is to minimise vertebrate testing where and when possible according to the ECHA guidance document R7b (2017).
The test proposal is submitted as a response to the ECHA manual completeness check letter concerning sections 6.1.2 Long-term toxicity to fish and 6.1.4 Long-term toxicity to aquatic invertebrates for three of the substances in the rosins and rosin salts category.

NON-CONFIDENTIAL NAME OF SUBSTANCE:
- Name of the substance on which testing is proposed to be carried out
Rosin Oligomers, CAS 65997-05-9, EC 500-163-2
Resin acids rosin acids, sodium salts, CAS 61790-51-0, EC 263-144-5
Resin acids rosin acids, reaction products with formaldehyde, sodium salts, CAS 91081-28-6, EC 293-631-8

- Name of the substance for which the testing proposal will be used [if different from tested substance]
1) Rosin (CAS 8050-09-7)
2) Rosin, hydrogenated (CAS 65997-06-0)
3) Resin acids and Rosin acids, potassium salts (CAS 61790-50-9)
4) Resin acids and Rosin acids, magnesium salts (CAS 68440-56-2)
5) Resin acids and Rosin acids, calcium salts (CAS 9007-13-0)
6) Resin acids and Rosin acids, calcium zinc salts (CAS 68334-35-0)
7) Resin acids and Rosin acids, aluminum salts (CAS 61789-65-9)
8) Resin acids and Rosin acids, manganese salts (CAS 9008-34-8)
9) Resin acids and Rosin acids, dimers, calcium zinc salts (CAS 1192825-55-0)
10) Resin acids and Rosin acids, hydrogenated, calcium salts (CAS 68554-12-1)
11) Resin acids and Rosin acids, hydrogenated, sodium salts (CAS 68990-02-3)
12) Rosin, reaction products with formaldehyde (CAS 91081-53-7)
13) Resin acids and Rosin acids, reaction products with formaldehyde, potassium salt (CAS 92129-53-8)

CONSIDERATIONS THAT THE GENERAL ADAPTATION POSSIBILITIES OF ANNEX XI OF THE REACH REGULATION ARE NOT ADEQUATE TO GENERATE THE NECESSARY INFORMATION [please address all points below]:
- Available GLP studies
There are no available GLP studies for long-term toxicity in aquatic organisms.

- Available non-GLP studies
There are no available studies for long-term toxicity in aquatic invertebrates.

- Historical human data
Not applicable to long-term toxicity testing in aquatic invertebrates.

- (Q)SAR
The category members are UVCBs, therefore, QSAR predictions would be only derived for single constituents. It would not be appropriate to assess hazard to the aquatic environment of poorly water-soluble UVCBs using QSARs.

- In vitro methods
Currently, there are no EU / OECD guidelines for in vitro tests of relevance to aquatic toxicity.

- Weight of evidence
Since there are no reliable data on long-term toxicity studies (experimental, QSAR or based on read across) for long-term in fish or other aquatic species, it is not possible to derive a weight of evidence for this endpoint.

- Grouping and read-across
A read-across approach has been used to fulfil several endpoints for substances in the category rosin and rosin salts. No data are available for long-term aquatic toxicity for any substance in this category. The long-term Daphnia magna toxicity test is proposed, using the three representative category members to fill the data-gaps for these substances and, to then be used to read-across to other substances in the category.

- Substance-tailored exposure driven testing [if applicable]
NA

- Approaches in addition to above [if applicable]
NA

- Other reasons [if applicable]
The results from long-term aquatic testing would improve the data-set for category.

CONSIDERATIONS THAT THE SPECIFIC ADAPTATION POSSIBILITIES OF ANNEXES VI TO X (AND COLUMN 2 THEREOF) OF THE REACH REGULATION ARE NOT ADEQUATE TO GENERATE THE NECESSARY INFORMATION:
The substances are poorly water-soluble, therefore, no adaptations are applicable from Column 2 of Annexes VI to X.

FURTHER INFORMATION ON TESTING PROPOSAL IN ADDITION TO INFORMATION PROVIDED IN THE MATERIALS AND METHODS SECTION:
- Details on study design / methodology proposed [if relevant]
The long-term testing will be carried out using Daphnia magna according to OECD TG 211 (2012). In addition, the Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures, OECD Series on Testing and Assessment, No. 23 will be considered as the proposed test materials are UVCB substances. The long-term testing will be preceded by a range finding test where concentration levels of the definitive study will be determined.

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 211 (Daphnia magna Reproduction Test)

Test material

Test material information

Constituent 1

Reference substance name:

Resin acids and Rosin acids, sodium salts

EC Number:

263-144-5

EC Name:

Resin acids and Rosin acids, sodium salts

Cas Number:

61790-51-0

Molecular formula:

C19H29COOH

IUPAC Name:

Resin acids and Rosin acids, sodium salts