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EC number: 209-529-3 | CAS number: 584-08-7
- 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
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to fish
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1993-12-31 to 1994-01-04
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: FIFRA Guideline 72-1 (national standard, US, comparable to international guidelines)
- GLP compliance:
- yes
- Analytical monitoring:
- yes
- Vehicle:
- no
- Test organisms (species):
- Oncorhynchus mykiss (previous name: Salmo gairdneri)
- Details on test organisms:
- TEST ORGANISM
- Common name: Rainbow trout
- Source: Mount Lassen Trout Farm, Red Bluff, California
- Length at study initiation (length definition, mean, range and SD): mean: 52 mm (range: 41 - 58 mm, N=30)
- Weight at study initiation (mean and range, SD): mean wet weight: 1.4 g (range: 0.78 - 2.0, N=30)
- Method of breeding: not reported
- Feeding during test:not reported
ACCLIMATION: not reported
- Test type:
- flow-through
- Water media type:
- freshwater
- Total exposure duration:
- 96 h
- Hardness:
- Total hardness as CaCO3: 11 - 39 mg/L
- Test temperature:
- 11 - 12 °C
- pH:
- 6.4 - 7.3
- Nominal and measured concentrations:
- nominal test concentrations: 18, 30, 50, 83, 140 and 230 mg a.i./L
measured test concentartions: 17, 33, 54, 85, 150 and 230 mg a.i./L - Details on test conditions:
- TEST SYSTEM: Not reported, only excerpts of study report available
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: Well water supplemented with Town of Wareham well wa
ter
- Total organic carbon: not reported
- Conductivity: 50 - 130 μmhos/cm
- Culture medium different from test medium: no reported
- Intervals of water quality measurement: not reported
OTHER TEST CONDITIONS
- Adjustment of pH: not reported
- Photoperiod: 16 hours light, 8 hours dark
- Light intensity: 26 to 100 footcandles at test termination
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) : mortality
TEST CONCENTRATIONS: Not reported, only excerpts of study report available
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- 68 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- act. ingr.
- Basis for effect:
- mortality (fish)
- Remarks on result:
- other: 95% CL: 61 - 75 mg a.i./L
- Duration:
- 96 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 33 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- act. ingr.
- Basis for effect:
- mortality (fish)
- Reported statistics and error estimates:
- LC 50 was calculated by probit analysis.
- Validity criteria fulfilled:
- not specified
- Remarks:
- no data (Not reported, only excerpts of study report available)
- Conclusions:
- In a 96-h acute toxicity study according to national guideline FIFRA Guideline 72-1 the 96-h LC50 for Rainbow trouts (Oncorhynchus mykiss) was 68 mg a.i./L (95% CL: 61 - 75 mg a.i./L). The NOEC, based on mortality, was 33 mg a.i./L.
- Executive summary:
In a 96-h acute toxicity study according to national guideline FIFRA Guideline 72-1, Rainbow trouts (Oncorhynchus mykiss) were exposed to Potassium carbonate at measured concentrations of 17, 33, 54, 85, 150 and 230 mg a.i./L under flow through conditions. The 96-h LC50was 68 mg a.i./L. The NOEC, based on mortality, was 33 mg a.i./L.
This toxicity study is classified as reliable with restrictions and satisfies the guideline requirement for acute toxicity study to fish.
Results Synopsis
Test Type (Flowthrough): FIFRA Guideline 72-1
LC50: 68 mg a.i./L 95% CL: 61 - 75 mg a.i./L
NOEC: 33mg a.i./L
Endpoint(s) Effected: mortality
Reference
Description of key information
96-h LC50 for rainbow trout (Oncorhynchus mykiss) was 68 mg a.i./L (95% CL: 61 - 75 mg a.i./L). Despite of this, potassium carbonate is an alkaline substance, which dissociates completely to form potassium cations (K+) and inorganic carbon species. Depending on pH of the receiving waters CO2 is the predominant species at pH values below 6.35, while HCO3- is the predominant species at a pH in the range between 6.35 and 10.33 and CO3 2- is the predominant species at pH values above 10.33. In the majority of the natural waters, pH levels are between 6 and 10. Thus HCO3- (pKa= 10.33) is the most important species for the buffer capacity. Therefore the pH will remain between environmentally expected ranges.
Overall, potassium carbonate is not expected to have an intrinsic toxic activity to aquatic organisms.
Key value for chemical safety assessment
Additional information
In a 96-h acute toxicity study according to national standard (US), comparable to international guideline FIFRA Guideline 72-1 the 96-h LC50 for Rainbow trouts (Oncorhynchus mykiss) was 68 mg a.i./L (95% CL: 61 - 75 mg a.i./L). The NOEC, based on mortality, was 33 mg a.i./L. In a second 96-h acute toxicity study according to national guideline FIFRA Guideline 72-1 the toxicity to Bluegill sunfish (Lepomis macrochirus) was considerably lower. The 96-h LC50 was determined to be 230 mg a.i./L (95% CL: 140 - 240 mg a.i./L). The NOEC, based on mortality, was 140 mg a.i./L.
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