Registration Dossier
Registration Dossier
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Reaction mass of isomers disodium 8-(2-{4-[benzyl(ethyl)amino]-2-methylphenyl}diazen-1-yl)-5-(2-{2,5-dimethyl-4-[2-(3-sulfonatophenyl)diazen-1-yl]phenyl}diazen-1-yl)naphthalene-2-sulfonate, disodium 5-(2-{4-[benzyl(ethyl)amino]-2-methylphenyl}diazen-1-yl)-8-(2-{2,5-dimethyl-4-[2-(3-sulfonatophenyl)diazen-1-yl]phenyl}diazen-1-yl)naphthalene-2-sulfonate
EC number: 700-946-0 | CAS number: -
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
ErC50 (7d) = 169 mg/L, 95% confidence intervals (132 – 222)
ErdwC50 (7d) = 283 mg/L, 95% confidence intervals (191 – 469)
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 169 mg/L
Additional information
The effects of test item on the growth of the monocotyledon species Lemna minor was determined according to the principles of OECD 221.
A static exposure over 7 days was carried out. Based on a preliminary test, 5 nominal test item concentration levels were tested in a geometrical series with a dilution factor of √10: 10.0 - 31.6 - 100.0 - 316.0 - 1000 mg/L. The concentrations of the test item were analysed via HPLC-DAD at the start (day 0) and the end of the exposure (day 7). The measured concentrations of the test item at the start of the exposure were in the range of 93 to 99 % of the nominal value. The measured concentration at the end of the exposure were in the range of 95 to 108 % of the nominal value. The validity criteria of the test guideline were fulfilled.
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