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EC number: 205-288-3 | CAS number: 137-30-4
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 11.09.2006 - 19.01.2007
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- 1992
- Deviations:
- yes
- Remarks:
- see field "any other information on results incl. tables"
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: the activated sludge was collected from the secondary treatment system of an integrated system for liquid effluent treatment from South Petrochemical Complex Triunfo- RS- Brazil.
- Preparation of inoculum for exposure: 1 L of activated sludge was aerated for 5 to 7 days and subsequently filtered.
- Initial cell/biomass concentration: 6.4 x 10^6 colony forming units/mL
- Other: 50 mL inoculum/3 L mineral medium was used - Duration of test (contact time):
- 28 d
- Initial conc.:
- 42.5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium:
KH2PO4 8.50 g/L
K2HPO4 21.75g/L
Na2HPO4.2H2O 33.40 g/L
NH4CI 0.50 g/L
MgSO4.7H20 22.50 g/L
FeCI3.6H20 0.25 g/L
CaCl2.2H2O 36.40 g/L
- Suspended solids concentration: 9.08 g/L
- Test temperature: 19.7 - 24.6 °C
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: 4 L flasks
- Number of culture flasks/concentration: 2 (0.1276 g test substance + 50 mL inoculum + 3 L mineral medium)
- Method used to create aerobic conditions: continuous air-flow system
- Details of trap for CO2 and volatile organics if used: by titration of sodium hydroxide 0.9917 M (CO2 absorbent) with chloridric acid 0.2556 N
CONTROL AND BLANK SYSTEM
- Inoculum blank: 1 (inoculum + mineral medium)
- Toxicity control: 1 (0.0633 g test substance + 0.1273 g reference substance + 50 mL inoculum + 3 L mineral medium)
- Procedure control: 1 (0.0635 g reference substance + 50 mL inoculum + 3 L mineral medium) - Reference substance:
- other: potassium hydrogen phthalate
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 7.7
- Sampling time:
- 4 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 7.7
- Sampling time:
- 28 d
- Results with reference substance:
- 85.9% after 10 days
- Validity criteria fulfilled:
- yes
- Remarks:
- For details refer to field "Any other information on results incl. tables"
- Interpretation of results:
- other: not readily biodegradable
Reference
The test could not properly investigate possible ready biodegradability since the test substance was inhibitory to microorganisms.
Biodegradation in the toxicity control was 37.7% within 14 days since test initiation.
DEVIATIONS:
The temperature reached a min. of 19.7°C and a max. of 24.6°C, which is higher than the deviation specified by the guideline (22 +/-2°C). However the temperature was within the range of 22 +/-2°C for 98.5% of the experimental time. Therefore, it is not expected that the short time would have affected the organisms and the test result.
The number of viable cells and suspended solids concentration of the inoculum was different that specified in the guideline. The concentrations were 10^7 - 10^8 and <<30 mg/L, respectively. The procedure control reached the acceptability criteria of the study. Therefore it is concluded that this incident did not affect the final result of the study.
VALIDITY CRITERIA:
Table 1: Validity criteria for OECD 301.
Criterion from the guideline |
Outcome |
Validity criterion fulfilled |
Difference of extremes of replicate values of the removal of the test chemical at the plateau, at the end of the test or at the end of the 10-d window, as appropriate, is less than 20%. |
7.7% difference
|
yes |
Percentage degradation of the reference compound reached the pass level by day 14 (≥ 60%). |
85 - 86.8% |
yes |
The toxicity control should degrade to at least 35% (based on DOC) or at least 25% (based on ThOD or ThCO2) within 14 d. |
37.7% after 4 d and 14 d |
yes |
The IC content of the test substance suspension in the mineral medium at the beginning of the test must be less than 5% of the TC. |
Not specified |
Not specified |
The total CO2 evolution in the inoculum blank at the end of the test should not normally exceed 40 mg/L medium. |
0.0293 g |
yes |
Description of key information
Zinc bis dimethyldithiocarbamate (CAS No. 137-30-4) is not readily biodegradable: 7.7% (CO2 evolution) in 28 days (OECD 301 B)
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
One study investigating the ready biodegradability of zinc bis dimethyldithiocarbamate (CAS No. 137-30-4) is available (2007). This test was conducted according to the OECD Guideline No. 301B (1992). Non-adapted activated sludge was exposed for 28 days to a test substance concentration of 42.5 mg/L. A procedure and a toxicity control were run in parallel. The test substance reached a maximum of 7.7% biodegradation after 28 d and therefore, it is considered as not readily biodegradable. In the toxicity control 37.7% degradation was observed within 14 days. Some inhibition occurred during that study as stated by the authors.
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