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Diss Factsheets
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EC number: 256-380-5 | CAS number: 49564-57-0
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_ecotoxicological-information.png)
Toxicity to microorganisms
Administrative data
- Endpoint:
- activated sludge respiration inhibition testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1988 - 1989
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: well performed OECD study but without GLP
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 989
- Report date:
- 1989
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
- Deviations:
- not specified
- GLP compliance:
- no
Test material
- Reference substance name:
- 4-amino-5-methoxy-N,2-dimethylbenzenesulphonamide
- EC Number:
- 256-380-5
- EC Name:
- 4-amino-5-methoxy-N,2-dimethylbenzenesulphonamide
- Cas Number:
- 49564-57-0
- Molecular formula:
- C9H14N2O3S
- IUPAC Name:
- 4-amino-5-methoxy-N,2-dimethylbenzene-1-sulfonamide
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- no
Test organisms
- Test organisms (species):
- activated sludge, domestic
- Details on inoculum:
- Origin: Sewage treatment plant at Frankfurt am Main-Sindlingen
Preparation of the suspension : sediment from activated sewage sludge was washed three times by centrifuging and resuspending in water with 0.9 % NaCl.
Content of suspended solids in the sewage sludge suspension: 2 g/L (dry matter)
Study design
- Test type:
- static
- Limit test:
- no
- Total exposure duration:
- 3 h
Test conditions
- Test temperature:
- 21 +- 1 °C
- pH:
- 7.6 - 7.7
- Nominal and measured concentrations:
- 500 mg/L and 1000 mg/L nominal
- Details on test conditions:
- Incubation vessels: Glasbottles with a diameter of 60 mm and a grounded neck (NS29), height 170 mm and a total volume of approx. 480 ml. The
bottles contained magnetic stirrer bars and were incubated in a water bath on magnetic stirrers.
Test volume: 200 ml each batch
Aeration rate/test vessel : 45 litres per hour, only during the incubation period. - Reference substance (positive control):
- yes
- Remarks:
- 3,5-Dichlorophenol
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 3 h
- Dose descriptor:
- EC10
- Effect conc.:
- 491.7 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- inhibition of total respiration
- Remarks:
- respiration rate
- Duration:
- 3 h
- Dose descriptor:
- EC50
- Effect conc.:
- 962.1 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- inhibition of total respiration
- Remarks:
- respiration rate
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The EC50 of Kresidinsulfmethylamid to activated sludge (domestic sewage treatment plant) is 962.1 mg/L.
- Executive summary:
In the respiration inhibition test, the oxygen consumption rates of aliquots of activated domestic sewage sludge were simultaneously measured in the presence of various test substance concentrations. The decreasing oxygen concentrations were monitored by recorders. The slopes of the plotted curves were used as measure for the respiratory activities. The amounts of activity reduction were calculated as percentage in relation to the controls and assessed as respiration inhibition. If the inhibition values showed a clear dose-effect-relationship, the concentrations for 10%, 50% and 90% inhibition were determined as test result.
The sensitivity of the activated sludge was tested with a reference batch. Reference substance was 3,5-Dichlorophenol in the concentrations of 5 and 30 mg/L. As blank control an inoculated test culture without addition of the test substance was used. It was topped up to the standard batch volume with water.
The EC50 of Kresidinsulfmethylamid to activated sludge (domestic sewage treatment plant) is 962.1 mg/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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