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EC number: 231-672-5 | CAS number: 7681-55-2
- 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
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- 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 aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- not reported
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- other: read-across target
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Study to investigate the effect of growth inhibition on the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp. following exposure to potassium iodide.
- GLP compliance:
- not specified
- Analytical monitoring:
- not specified
- Vehicle:
- not specified
- Test organisms (species):
- Chlorella sp.
- Test type:
- not specified
- Water media type:
- not specified
- Total exposure duration:
- 10 d
- Test temperature:
- 25 °C
- Dissolved oxygen:
- above 45 % saturation
- Details on test conditions:
- TEST SYSTEM
- Fill volume: 10 mL
- Aeration: inocula were incubated in an oscillator shaker at a rate of 150 rpm
- Initial cells density: 3 × 10^4 alga cells
TEST MEDIUM
- Standard medium used: f/2 medium
OTHER TEST CONDITIONS
- Photoperiod: 12 h/12 h light/dark cycle
- Light intensity and quality: light irradiation of 81.04 μmolm^−2 s^−1
EFFECT PARAMETERS MEASURED
The growth of algae was determined by counting the number of cells using a haemacytometer The minimum concentration of potassium iodide that inhibited growth was designated as MIC100.
ANALYSIS
Cell density was determined by a haemacytometer. Biomass was determined as cell dry weight. - Reference substance (positive control):
- not specified
- Key result
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 696.2 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Reported statistics and error estimates:
- The data collected in the experiments were processed using SPSS 10.0 software. The assumptions of analysis of variance were considered to be statistically significant at p < 0.05.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Chlorella sp.) over a 10 day study period, was determined to be 696.2 ± 9.4 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Chlorella sp.).
- Executive summary:
The effect of growth inhibition on the algae Chlorella sp. was investigated following a 10-day exposure to potassium iodide.
Under the conditions of the study, the Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Chlorella sp.) over a 10 day study period, was determined to be 696.2 ± 9.4 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Chlorella sp.).
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- not reported
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- other: read-across target
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Study to investigate the effect of growth inhibition on the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp. following exposure to potassium iodide.
- GLP compliance:
- not specified
- Analytical monitoring:
- not specified
- Vehicle:
- not specified
- Test organisms (species):
- other: Cryptomonas sp.
- Test type:
- not specified
- Water media type:
- not specified
- Total exposure duration:
- 10 d
- Test temperature:
- 25 °C
- Dissolved oxygen:
- above 45 % saturation
- Details on test conditions:
- TEST SYSTEM
- Fill volume: 10 mL
- Aeration: inocula were incubated in an oscillator shaker at a rate of 150 rpm
- Initial cells density: 3 × 10^4 alga cells
TEST MEDIUM
- Standard medium used: f/2 medium
OTHER TEST CONDITIONS
- Photoperiod: 12 h/12 h light/dark cycle
- Light intensity and quality: light irradiation of 81.04 μmolm^−2 s^−1
EFFECT PARAMETERS MEASURED
The growth of algae was determined by counting the number of cells using a haemacytometer The minimum concentration of potassium iodide that inhibited growth was designated as MIC100.
ANALYSIS
Cell density was determined by a haemacytometer. Biomass was determined as cell dry weight. - Reference substance (positive control):
- not specified
- Key result
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 475.9 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Reported statistics and error estimates:
- The data collected in the experiments were processed using SPSS 10.0 software. The assumptions of analysis of variance were considered to be statistically significant at p < 0.05.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Cryptomonas sp.) over a 10 day study period, was determined to be 475.9 ± 10.3 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Cryptomonas sp.).
- Executive summary:
The effect of growth inhibition on the algae Cryptomonas sp. was investigated following a 10-day exposure to potassium iodide.
Under the conditions of the study, the Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Cryptomonas sp.) over a 10 day study period, was determined to be 475.9 ± 10.3 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Cryptomonas sp.).
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- not reported
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- other: read-across target
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Study to investigate the effect of growth inhibition on the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp. following exposure to potassium iodide.
- GLP compliance:
- not specified
- Analytical monitoring:
- not specified
- Vehicle:
- not specified
- Test organisms (species):
- Dunaliella salina
- Test type:
- not specified
- Water media type:
- not specified
- Total exposure duration:
- 10 d
- Test temperature:
- 25°C
- Dissolved oxygen:
- above 45 % saturation
- Details on test conditions:
- TEST SYSTEM
- Fill volume: 10 mL
- Aeration: inocula were incubated in an oscillator shaker at a rate of 150 rpm
- Initial cells density: 3 × 10^4 alga cells
TEST MEDIUM
- Standard medium used: modified Johnson’s medium
OTHER TEST CONDITIONS
- Photoperiod: 12 h/12 h light/dark cycle
- Light intensity and quality: light irradiation of 81.04 μmolm^−2 s^−1
EFFECT PARAMETERS MEASURED
The growth of algae was determined by counting the number of cells using a haemacytometer The minimum concentration of potassium iodide that inhibited growth was designated as MIC100.
ANALYSIS
Cell density was determined by a haemacytometer. Biomass was determined as cell dry weight. - Reference substance (positive control):
- not specified
- Key result
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 356.8 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Reported statistics and error estimates:
- The data collected in the experiments were processed using SPSS 10.0 software. The assumptions of analysis of variance were considered to be statistically significant at p < 0.05.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Dunaliella salina) over a 10 day study period, was determined to be 356.8 ± 14.6 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Dunaliella salina).
- Executive summary:
The effect of growth inhibition on the algae Dunaliella salina, was investigated following a 10-day exposure to potassium iodide.
Under the conditions of the study, the Minimum Inhibitory Concentration (MIC100) value of potassium iodide in algae (Dunaliella salina) over a 10 day study period, was determined to be 356.8 ± 14.6 mg/L. It is therefore concluded that potassium iodide does not exhibit toxicity to algae (Dunaliella salina).
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted on read-across material
- Justification for type of information:
- The read-across chemical is potassium iodide (CAS No 7681-11-0) which belongs to the same family/category of inorganic iodine compounds as the target chemical sodium iodate. It is understood that iodide oxidises to iodate and that the anion is the fragment of the substance that drives toxicity. Furthermore potassium and sodium cations are ubiquitous in the environment and are not expected to cause an effect at dosing concentrations.
- Reason / purpose for cross-reference:
- read-across source
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 696.2 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted on read-across material
- Justification for type of information:
- The read-across chemical is potassium iodide (CAS No 7681-11-0) which belongs to the same family/category of inorganic iodine compounds as the target chemical sodium iodate. It is understood that iodide oxidises to iodate and that the anion is the fragment of the substance that drives toxicity. Furthermore potassium and sodium cations are ubiquitous in the environment and are not expected to cause an effect at dosing concentrations.
- Reason / purpose for cross-reference:
- read-across source
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 475.9 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted on read-across material
- Justification for type of information:
- The read-across chemical is potassium iodide (CAS No 7681-11-0) which belongs to the same family/category of inorganic iodine compounds as the target chemical sodium iodate. It is understood that iodide oxidises to iodate and that the anion is the fragment of the substance that drives toxicity. Furthermore potassium and sodium cations are ubiquitous in the environment and are not expected to cause an effect at dosing concentrations.
- Reason / purpose for cross-reference:
- read-across source
- Duration:
- 10 d
- Dose descriptor:
- other: MIC100
- Effect conc.:
- 356.8 mg/L
- Nominal / measured:
- meas. (not specified)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
Referenceopen allclose all
Description of key information
The Minimum Inhibitory Concentration (MIC100) value of potassium iodide in the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp., over a 10 day study period, was determined to be 356.8 ± 14.6, 475.9 ± 10.3, and 696.2 ± 9.4 mg/L, respectively. It is therefore concluded that potassium iodide does not exhibit toxicity to the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp.
Key value for chemical safety assessment
Additional information
The effect of growth inhibition on the algae Cryptomonas sp. was investigated following a 10-day exposure to potassium iodide.
Under the conditions of the study, the Minimum Inhibitory Concentration (MIC100) value of potassium iodide in the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp., over a 10 day study period, was determined to be 356.8 ± 14.6, 475.9 ± 10.3, and 696.2 ± 9.4 mg/L, respectively. It is therefore concluded that potassium iodide does not exhibit toxicity to the algae Dunaliella salina, Cryptomonas sp. and Chlorella sp.
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