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EC number: 213-742-7 | CAS number: 1006-23-1
- 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
Toxicity to microorganisms
Administrative data
- Endpoint:
- activated sludge respiration inhibition testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study according OECD 209
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
- Deviations:
- yes
- Remarks:
- ; Exceeding the test temperature range of 20 ± 2 °C with 0.2°C. An influence to the results of this study can be excluded.
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.11 (Biodegradation: Activated Sludge Respiration Inhibition Test)
- Deviations:
- yes
- Remarks:
- ; Exceeding the test temperature range of 20 ± 2 °C with 0.2°C. An influence to the results of this study can be excluded.
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 5-nitro-2,4,6-triaminopyrimidine
- EC Number:
- 213-742-7
- EC Name:
- 5-nitro-2,4,6-triaminopyrimidine
- Cas Number:
- 1006-23-1
- Molecular formula:
- C4 H6 N6 O
- IUPAC Name:
- 5-nitropyrimidine-2,4,6-triamine
- Details on test material:
- - Physical state: Solid/ pink to red
- Storage condition of test material: Ambient at room temperature
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- no
- Details on test solutions:
- - Application of the test substance: Direct addition by initial weight into the test flasks. The test substance was weighed in the required amounts for the test concentrations directly to the test vessels.
Test organisms
- Test organisms (species):
- activated sludge, domestic
- Details on inoculum:
- Test system: municipal Activated sludge
Reason for the selection of the test system: required by the test guidelines
Age: 1 day
Origin: aeration tank of the wastewater treatment plant of Mannheim, Germany
Collection of the test system: 14 Jan 2015
Arrival in the test facility: 14 Jan 2015
After arrival of the activated sludge suspension in the test facility the suspension was sieved with a fine woven mesh (mesh size about 1 mm). This suspension was pre-aerated over night at room temperature. At the next day the sludge suspension was washed once with drinking water and the suspension was adjusted to 3 g/L Dw.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 3 h
Test conditions
- Test temperature:
- 21.3 - 22.2 °C
- pH:
- 7.4 - 7.5
- Dissolved oxygen:
- Oxygen concentration during aeration: > 2 mg/L
Oxygen concentration immediately before measurement: > 7 mg/L - Nominal and measured concentrations:
- 1000, 500, 250, 125, 62.5 mg/L as nominal concentration based on test substance and blank controls.
100, 10, 1 mg/L as nominal concentration based on reference substance. - Details on test conditions:
- TEST SYSTEM
- Test vessel: Glas-beakers (nominal volume 1L)
- Test volume: 500 mL
- Sludge concentration in the test vessel: 1.5 g/L Dw
- No. of vessels per concentration (replicates): 3
- No. of vessels per control (replicates): 6
- No. of vessels per each reference substance (replicates): 2
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: 16 mL/test vessel of 100-fold concentrated OECD medium
OTHER TEST CONDITIONS
- Adjustment of pH: no
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
TEST CONCENTRATIONS
- Spacing factor for test concentrations: According to the test guidelines, at least 5 concentrations in a geometric series with a separation factor of ≤ 3.2 should be used, preferably encompassing the range from 10 – 80% inhibition. - Reference substance (positive control):
- yes
- Remarks:
- 3,5 dichlorophenol
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 3 h
- Dose descriptor:
- EC10
- Effect conc.:
- > 1 000 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:
- other: EC20
- Effect conc.:
- > 1 000 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.:
- > 1 000 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:
- other: EC80
- Effect conc.:
- > 1 000 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- inhibition of total respiration
- Remarks:
- respiration rate
- Details on results:
- Validity criteria:
The coefficient of variation of the six replicates of blank control was 3.6 % O2 consumption.
The EC50 of 3,5-dichlorophenol was 8.6 mg/L
The mean oxygen uptake of the blank controls was 22 mg/g*h
In conclusion, the test conformed to all validity criteria and is valid. - Results with reference substance (positive control):
- In order to verify that the microorganisms are responding normally to toxic stress, tests with a reference substance are conducted according to OECD 209 guideline. The results from the reference substance test are compared to EC50 values published in OECD 209 guideline, which represent the typical response range.
According to the test guideline OECD 209 the EC50 values of the reference substance 3,5-dichlorophenol should be in the range of 2-25 mg/L after 3 hours of incubation.
The EC50 of the reference substance 3,5-dichlorophenol was in the range of 2-25 mg/L in 3 hours.
These results indicate that the microorganisms are responding normally to toxicant stress.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The inhibition of the degradation activity of activated sludge is not anticipated when introduced to biological treatment plants in appropriate low concentrations.
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