Disodium 3,3'-[[6-[bis(2-hydroxyethyl)amino]-1,3,5-triazine-2,4-diyl]bis[imino(3-methoxy-4,1-phenylene)azo]]bis[benzenesulphonate]

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

no hazard identified

Marine water

Hazard assessment conclusion:

no hazard identified

STP

Hazard assessment conclusion:

no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:

no hazard identified

Sediment (marine water)

Hazard assessment conclusion:

no hazard identified

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

Adequate chronic toxicity data is not available for Direct Yellow 142, therefore the aquatic toxicity assessment and classification are based mainly on the short-term toxicity data available on the substance and on the structural analogues.

Direct Yellow 142 is very water soluble and it is not rapidly degradable. It has a log Kow lower than 4, indicating a low potential for bioaccumulation; in addition, on the basis of the molecular mass greater than 700, it is expected to be not readily taken up by fish, because of possible steric hindrance at passage of gill membranes or cell membranes of respiratory organs.

Key outcomes concerning the tests run on organisms belonging to the aquatic compartment:

- no effects or mortality were observed during the short-term toxicity test on fish (Cyprinus carpio) up to the limit concentration of 1000 mg/l (nominal)

- no immobilized invertebrates (Daphnia magna) were observed during the 48 -hours test; thus, the 48-h NOEC to Daphnia magna was determined to be at least 78 mg test item/l and EC50 48-h is likely to be higher than 100 mg test item/l

- for toxicity to aquatic plants (Lemna minor), the ErC50 (7d) resulted to be greater than the highest tested concentration of 100 mg/l (meas. geom mean)

- after 3 hours of exposure, no inhibition of microorganisms was recorded up to the highest concentration tested of 1000 mg/l

No acute toxicity (i.e. L(E)C50) was recorded in none of the experiments conducted on fish, invertebrate and aquatic plant, up to the higher concentration reached in the tests; therefore, the PNEC vales have been estimated using the lowest tested value.

The test substance resulted to be no harmful-toxic for activated sludge and not negatively impacting the microorganism activity; thus, it is deemed to be not able to affect the sewage treatment plants systems function.

Direct releases to air and/or sediment and/or soil are considered to be not relevant, on the basis of the substance usages describe into the IUCLID section 3.3; in addition, the physicochemical properties support the expectation of low relevance of the mentioned compartments.

The primary source of possible substance environmental release is represented by industrial waste waters.

Conclusion on classification

Adequate chronic toxicity data is not available for Direct Yellow 142, therefore the aquatic toxicity assessment and classification are based mainly on the short-term toxicity data available on the substance and on the structural analogues.

Direct Yellow 142 is very water soluble and it is not rapidly degradable; on the basis of the chemical structure characteristics and the negative log Kow (i.e. -3.31 at 20 °C), the substance is expected to be possess a low potential for bioaccumulation.

No L(E)C50 value was recorded at concentration equal/lower than 1 mg/l, thus the classification criteria for acute (short-term) aquatic hazard (category 1) of the CLP Regulation (EC) No 1272/2008 are not met.

In addition, no acute toxicity (i.e. L(E)C50) was recorded in none of the experiments conducted, up to the concentration of 100 mg/l; thus the classification criteria for long-term aquatic hazard (categories 2/3/4) of the CLP Regulation (EC) No 1272/2008 are not met.

In conclusion, the outcomes of the tests performed suggest that Direct Yellow 142 is not harmful/toxic for aquatic life.