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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC 50 = 10000 mg/L

Key value for chemical safety assessment

EC50 for microorganisms:
10 000 mg/L

Additional information

This highly insoluble substance makes aquatic toxicity testing impractical. A data waiver is specified.

According to the REACH Regulation, annex VIII, section 9.1.4, Column 2 “Specific rules for adaptation from Column 1”the study does not need to be conducted if:

1.     there is no emission to a sewage treatment plant; or

2.     there are mitigating factors indicating that microbial toxicity is unlikely to occur, for instance the substance is highly insoluble in water; or

3.     the substance is found to be readily biodegradable and the applied test concentrations are in the range of concentrations that can be expected in the influent of a sewage treatment plant.

 

Regarding point 2, the substance is technically highly insoluble in water, with a water solubility < 0.6 mg/l, but the substance also exhibits significant surface active properties and it forms very fine and stable dispersions. In this respect the substance is in a certain extent available into the water compartment, therefore the specific mitigating effect do not completely apply.

 

On the other side, according to the estimation and weight of evidence, the substance can be considered as readily biodegradable and the estimated PEC, according to the Exposure scenarios, are in the range of 2.77x10-4-3.82x10-6mg/l, well below the applied test concentrations.

 

ES 1: Manufacturing

Local PEC:5.84E-5 mg/L

RCR = 0.014

ES 2: Cosmetics-Formulation or re-packing

Local PEC: 2.77E-4 mg/L

RCR = 0.064

ES 3: Cosmetics- Consumer use

Local PEC: 3.76E-6 mg/L

RCR < 0.01

ES 4: Leather - Formulation

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 5: Leather – Use at industrial site

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 6: Textile - Formulation

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 7: Textile – Use at industrial site

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 8: Coatings and Paints - Formulation

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 9: Coatings and Paints – Use at industrial site

Local PEC: 4.47E-5 mg/L

RCR = 0.01

ES 10: Coatings and Paints – Professional use

Local PEC: 3.82E-6 mg/L

RCR < 0.01

ES 11: Coatings and Paints – Professional use

Local PEC: 3.76E-6 mg/L

RCR < 0.01

ES 12: Washing and Cleaning - Formulation

Local PEC: 9.16E-6 mg/L

RCR < 0.01

ES 13: Washing and Cleaning - Use at industrial site

Local PEC: 2.77E-4 mg/L

RCR = 0.064

ES 14: Biocides - Formulation

Local PEC: 3.1E-5 mg/L

RCR < 0.01

ES 15: Biocides - Use at industrial site

Local PEC: 3.1E-5 mg/L

RCR < 0.01

ES 16: Biocides - Professional use

Local PEC: 7.46E-6 mg/L

RCR < 0.01

ES 17: Biocides - Consumer use

Local PEC: 7.46E-6 mg/L

RCR < 0.01

ES 18: Filler and Putties- Formulation

Local PEC: 5.84E-5 mg/L

RCR = 0.014

ES 19: Filler and Putties - Use at industrial site

Local PEC: 2.56E-5 mg/L

RCR < 0.01

ES 20: Filler and Putties - Professional use

Local PEC: 3.82E-6 mg/L

RCR < 0.01

ES 21: Base metal and alloys- Formulation

Local PEC: 6.43E-6 mg/L

RCR < 0.01

ES 22: Base metal and alloys - Use at industrial site

Local PEC: 5.06E-6 mg/L

RCR < 0.01

ES 23: Fuels- Formulation

Local PEC: 3.1E-5 mg/L

RCR < 0.01

ES 24: Flocculants- Formulation

Local PEC: 1.46E-5 mg/L

RCR < 0.01

ES 25: Flocculants- Use at industrial site

Local PEC: 9.16E-6 mg/L

RCR < 0.01

ES 26: Polishes and wax blends- Formulation

Local PEC: 1.46E-5 mg/L

RCR < 0.01

ES 27: Polishes and wax blends- Use at industrial site

Local PEC: 9.16E-6 mg/L

RCR < 0.01

 

Based on the article of Dahong Sun 2008 (Sun, Danhong; He, Qiang; Zhang, Wenjun; Xin, Liu; Shi, Bi, Evaluation of environmental impact of typical leather chemicals: Part I biodegrability of fatliquors in activated sludge treatment, Journal of the Society of Leather Technologists and Chemists (2008), 92(1), 14-18. Language: English), sulphated castor oil not only showed a good biodegradability rate, but also no inhibilition of the respiration has been reported at any dose up to 1500 mg/l over 5 days

Read across from a similar substance (rape oil, sulphonated, sodium salt, EC 293-618-7) estimates no effects on the respiration of Psuedomonas putida at loading rates up to 10,000 mg/l (4900 mg/l active substance) (WAF testing approach taken). This result indicates a substance with low aquatic toxicity.

No effect loading = 10,000 mg/L

The substance used in read across is FLL Sample 9