Reaction products of 6-amino-4-hydroxynaphthalene-2-sulphonic acid and 7-amino-4-hydroxynaphthalene-2-sulphonic acid, condensed with Formaldehyde and Sodium hydrogensulfite, coupled with diazotised Sodium 2-amino-4,6-dinitrophenoxide, metalized with Sodium Dichromate, sodium salts

Endpoint summary

Description of key information

Short-term toxicity to aquatic invertebrates:

EC50 (48h) > 100 mg/l

Toxicity to aquatic plants other than algae:

ErC50 (7d,Lemna minor) > 100 mg/l

Additional information

The aquatic toxicity of the substance was investigated on aquatic invertebrates and on aquatic plants other than algae:

Short-term toxicity to aquatic invertebrates:

The acute toxicity of the test item to aquatic invertebrated was investigated on Daphnia magna STRAUS according to the OECD Guideline 202. Five concentrations were tested (4.6 - 100 mg/l nominal) on 20 daphnia each in a static test system.

After 48 hours in the highest concentration the immobilised daphnia were in the percentage of 35%. for this reason the 48h-EC50 was set as higher than the highest tested concentration (EC50 48h >100 mg/l)

Toxicity to aquatic plants other than algae:

The following data was obtained for the Similar Substance 01. It is expected that the Target substance will present similar effect levels to daphnia. Justification for Read Across is given in Section 13 of IUCLID.

The acute toxicity of the test item to aquatic plants was investigated in a 7–day static test to Lemna minor, according to the OECD Guideline 221 (2006). Six concentrations were tested (0 to 100 mg/l nominal). The frond number and the dry mass of each replicate were determined. Subsequently, Growth rate µ and the yield were determined from these parameters. The ErC50 (7d) based on both frond number and dry mass was found to be > 100 mg/l.