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 microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
NOEC (3h) = 500 mg/L
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 500 mg/L
Additional information
A Respiration Inhibition Test with activated sludge according to OECD Guideline No. 209 was carried out with the test item.
The test was carried out under static conditions with the substance concentrations of 250 - 500 - 1000 mg/L. The respiration rates of the control, reference and test item replicates were measured after a contact time of three hours, and the inhibitory effects of the test and reference item were determined in comparison to the control respiration rates. The mean inhibition of respiration for the test item replicates were in the range from 13 % to 25 %. The NOEC of the test item is 500 mg/L.
The test item is not toxic up to the concentration of 500 mg/L to activated sludge of a municipal sewage treatment plant.
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