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EC number: 257-269-4 | CAS number: 51548-48-2
- 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
- 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
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- Nanomaterial surface chemistry
- Nanomaterial dustiness
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- Nanomaterial pour density
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- 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:
- (Q)SAR
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Justification for type of information:
- QSAR prediction: migrated from IUCLID 5.6
- Qualifier:
- according to guideline
- Guideline:
- other: as mentoned below
- Principles of method if other than guideline:
- Prediction is done using QSAR Toolbox version 3.3
- GLP compliance:
- not specified
- Analytical monitoring:
- not specified
- Vehicle:
- not specified
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 72 h
- Hardness:
- No data available
- Test temperature:
- 22 °C
- pH:
- 8.1-8.3
- Dissolved oxygen:
- No data available
- Salinity:
- No data available
- Nominal and measured concentrations:
- No data available
- Reference substance (positive control):
- not specified
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 110.385 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The median Effective concentration (EC50) value for (5Or8)-aminonaphthalene-2-sulphonic acid on Desmodesmus subspicatus in a 72 hour study was estimated to be 110.384 mg/L on the basis of effects on growth rate.
- Executive summary:
72 hrs aquatic toxicity study was predicted to assess toxic effects of the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no. 51548 -48 -2) and the result were predicted. The study was based on the effects of the test compound on Desmodesmus subcapitata in a static fresh water
system. The predicted data suggests the effective concentration (EC50) for the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no.51548 -48 -2) was estimated to be 110.384 mg/l on the basis of growth rate. Thus, based on this value, it can be concluded that the test chemical can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.
Reference
The prediction was based on dataset comprised from the following descriptors: EC50
Estimation method: Takes average value from the 5 nearest neighbours
Domain logical expression:Result: In Domain
(((("a" or "b" or "c" or "d" or "e" ) and ("f" and ( not "g") ) ) and "h" ) and ("i" and "j" ) )
Domain logical expression index: "a"
Referential boundary: The target chemical should be classified as Anilines (Acute toxicity) by US-EPA New Chemical Categories
Domain logical expression index: "b"
Referential boundary: The target chemical should be classified as Aniline AND Aryl AND Fused carbocyclic aromatic AND Naphtalene AND Sulfonic acid by Organic Functional groups
Domain logical expression index: "c"
Referential boundary: The target chemical should be classified as Aniline AND Fused carbocyclic aromatic AND Naphtalene AND Overlapping groups AND Sulfonic acid by Organic Functional groups (nested)
Domain logical expression index: "d"
Referential boundary: The target chemical should be classified as Aliphatic Nitrogen, one aromatic attach [-N] AND Aromatic Carbon [C] AND Hydroxy, sulfur attach [-OH] AND Miscellaneous sulfide (=S) or oxide (=O) AND Olefinic carbon [=CH- or =C<] AND Suflur {v+4} or {v+6} AND Sulfinic acid [-S(=O)OH] AND Sulfonate, aromatic attach [-SO2-O] by Organic functional groups (US EPA)
Domain logical expression index: "e"
Referential boundary: The target chemical should be classified as Amine AND Aromatic compound AND Primary amine AND Primary aromatic amine AND Sulfonic acid AND Sulfonic acid derivative by Organic functional groups, Norbert Haider (checkmol)
Domain logical expression index: "f"
Referential boundary: The target chemical should be classified as No alert found by Protein binding alerts for Chromosomal aberration by OASIS v.1.2
Domain logical expression index: "g"
Referential boundary: The target chemical should be classified as Acylation OR Acylation >> Acylation involving an activated (glucuronidated) carboxamide group OR Acylation >> Acylation involving an activated (glucuronidated) carboxamide group >> Carboxylic Acid Amides OR Acylation >> Direct acylation involving a leaving group OR Acylation >> Direct acylation involving a leaving group >> Carboxylic Acid Amides OR AN2 OR AN2 >> Michael addition to activated double bonds in heterocyclic ring systems OR AN2 >> Michael addition to activated double bonds in heterocyclic ring systems >> Pyrazolone and Pyrazolidine Derivatives OR AN2 >> Michael addition to the quinoid type structures OR AN2 >> Michael addition to the quinoid type structures >> Carboxylic Acid Amides OR AN2 >> Michael addition to the quinoid type structures >> Substituted Anilines OR AN2 >> Shiff base formation with carbonyl compounds OR AN2 >> Shiff base formation with carbonyl compounds >> Pyrazolone and Pyrazolidine Derivatives by Protein binding alerts for Chromosomal aberration by OASIS v.1.2
Domain logical expression index: "h"
Similarity boundary:Target: Nc1cccc2cc(S(O)(=O)=O)ccc12
Threshold=50%,
Dice(Atom centered fragments)
Atom type; Count H attached; Hybridization
Domain logical expression index: "i"
Parametric boundary:The target chemical should have a value of log Kow which is >= -2.08
Domain logical expression index: "j"
Parametric boundary:The target chemical should have a value of log Kow which is <= 0.593
Description of key information
72 hrs aquatic toxicity study was predicted(SSS QSAR Prediction model, 2016)to assess toxic effects of the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no. 51548 -48 -2) and the result were predicted. The study was based on the effects of the test compound on Desmodesmus subcapitata in a static fresh water system. The predicted data suggests the effective concentration (EC50) for the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no.51548 -48 -2) was estimated to be 110.384 mg/l on the basis of growth rate.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 110.384 mg/L
Additional information
Various predicted data for the test chemical(5Or8)-aminonaphthalene-2-sulphonic acid(CAS No. 51548-48-2)were reviewed to summarize the following information:
72 hrs aquatic toxicity study was predicted(SSS QSAR Prediction model, 2016)to assess toxic effects of the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no. 51548 -48 -2) and the result were predicted. The study was based on the effects of the test compound on Desmodesmus subcapitata in a static fresh water system. The predicted data suggests the effective concentration (EC50) for the test compound (5Or8)-aminonaphthalene-2-sulphonic acid (CAS no.51548 -48 -2) was estimated to be 110.384 mg/l on the basis of growth rate.
Based on the QSAR prediction done using the EPI Suite ECOSAR version 1.10 (EPI Suite, 2016), the 96 hours EC50 was estimated to be 7965.639 mg/l on green algae for substance (5Or8)-aminonaphthalene-2-sulphonic acid with growth inhibition effects.
Estimated 72 hrs EC50 value (Danish QSAR database, 2016) of test substance (5Or8)-aminonaphthalene-2-sulphonic acid on Pseudokirchneriella subcapitatawas determined by three different models i.e, Battery, Leadscope and SciQSAR used within Danish QSAR database. Based on inhibition in growth rate of test organism Pseudokirchneriella subcapitata, the estimated 72 hrs EC50 value was found to be 2728.812 mg/l.
Based on the overall reported results for test substance, it can be concluded that the substance(5Or8)-aminonaphthalene-2-sulphonic acid can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.
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