Reaction mass of 2-isopropenyl-5-methylhex-4-en-1-ol and 2-isopropenyl-5-methylhex-4-enyl acetate and DL-borneol and caryophyllene and linalool and linalyl acetate and p-menth-1-en-4-ol

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:

toxicity to aquatic algae and cyanobacteria

Remarks:

Classification based on calculation rules for mixtures of the CLP Regulation

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

accepted calculation method

Justification for type of information:

Classification based on calculation rules for mixtures of the CLP Regulation. There is no experimental study reference.
Data are compiled on 7 major components which represent more than 85% of the UVCB.

Data source

Reference

Reference Type:

publication

Title:

ECOSAR v1.11

Author:

EPA United States Environnement Protection Agency

Year:

2012

Bibliographic source:

https://www.epa.gov/tsca-screening-tools/ecological-structure-activity-relationships-ecosar-predictive-model

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: QSAR ECOSAR

Version / remarks:

V1.11

Principles of method if other than guideline:

ECOSAR version 1.11

Test material

Test material information

Constituent 1

Reference substance name:

Reaction mass of 2-isopropenyl-5-methylhex-4-en-1-ol and 2-isopropenyl-5-methylhex-4-enyl acetate and DL-borneol and caryophyllene and linalool and linalyl acetate and p-menth-1-en-4-ol

EC Number:

946-901-0

Molecular formula:

not relevant

IUPAC Name:

Reaction mass of 2-isopropenyl-5-methylhex-4-en-1-ol and 2-isopropenyl-5-methylhex-4-enyl acetate and DL-borneol and caryophyllene and linalool and linalyl acetate and p-menth-1-en-4-ol

Results and discussion

Effect concentrations

Duration:

96 h

Dose descriptor:

EC50

Effect conc.:

ca. 2.436 mg/L

Remarks on result:

other:

Applicant's summary and conclusion

Validity criteria fulfilled:

not applicable

Conclusions:

Based on a weight of evidence approach, the toxicity of assessed substance to algae can be estimated using adequate toxicity data of major constituents, greater than 1% in the mixture.
Seven constituents were considered, representing more than 85% of the mixture.
These data are summarized in the above table.
The toxicity to algae were estimated using the following additivity formulas, as recommended in the Regulation (EC) No 1272/2008 (CLP) section 4.1.3.5.2:
∑ Ci / L(E)C50m = ∑ (Ci / L(E)C50i)
Where,Ci = concentration of component i (weight percentage);
L(E)C50i = LC50 or EC50 for component i, in mg/L; L(E)C50m = L(E)C50 of the part of the mixture with test data.
Based on data presented above, the EC50 value for UVCB substance is calculated at 2.44 mg/L for algae.

Executive summary:

With a EC50 algae value of 2.44 mg/l and some constituents (caryophyllene and lavandulyle acetate with logKow > 4), the substance is classified H411 (cat 2).