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EC number: 222-656-9 | CAS number: 3567-66-6
- 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 aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Evaluate the toxicity of D&C Red No. 33 in aquatic algae was done by prediction metrhod. Prediction is done using QSAR Toolbox version 3.3.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 122.625 mg/L
Additional information
The effect of test item disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate, CAS No. 3567-66-6 was studied on the growth of fresh water green algaChlorella vulgaris.The study was conducted following OECD guideline 201- Alga, growth inhibition test. The test concentration chosen for the study were 6.25mg/l, 12.5mg/l, 25mg/l, 50mg/l, 100mg/l and 200mg/l. The test concentrations were prepared using stock solution of the test item using mineral media. The green alga was exposed to the test concentration for a period of 72 hours to observe average specific growth rate and % growth inhibition under the effect of the test item.
EC50 calculated graphically through probit analysis was observed to be 19.590mg/l.
Toxicity to aquatic algae and cyanonobacteriunm for D&C Red No. 33 was predicted by QSAR Toolbox version 3.3. TheEC50 was predicted to be 122.6248703 mg\L for D&C Red No. 33in Desmodesmus subspicatus for 72 hour. Based on the above mentioned values for the chemical, it is considered that D&C Red No. 33 is not hazardous to the aquatic organisms at environmentally relevant concentrations and canbe considered not classified as per the CLP classification.
The toxicity to aquatic algae was estimated by the QSAR prediction done using the EPI Suite ECOSAR version 1.1.
In Short-term toxicity toGreen Algaetest , EC50 was estimated to be1647.016mg/Lfor2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-(phenylazo)-, disodium saltinDaphnia magna for 48 Hour. Based on the above mentioned values for the chemical, it is considered that 2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-(phenylazo)-, disodium salt is not hazardous to the aquatic organisms at environmentally relevant concentrations and can not be classified as per the CLP classification.
The toxicity to aquatic algae was estimated by the Danish (Q) SAR Database 2016.Based on the QSAR prediction done using the Danish (Q)SAR Database, the 72 hours EC50 was estimated to be1121.686 mg/lonPseudokirchneriella s. for substance disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate with growth inhibition effects. Thus based on this value it can be concluded that the substance can be classified as non toxic to aquatic environment as per the criteria of CLP regulation.
In a supporting study by (Luis A.V. de Luna, et.al. ,2014 ) with the similar substance (CAS NO:633-96-5),Short term toxicity study toPseudokirchneriella subcapitatawas carried out for 72 hrs. For the preparation of the test inoculum, an algae population was harvested from the cell culture and centrifuged at 2000gfor 10 min. ICp software was used to calculate the inhibition growth concentration (IC50). One-way ANOVA andSidak-testwere also performed (OriginLab 8.5 software). Based on growth inhibition of test organism, the IC50 value was found to be > 100 mg/
Based on the experimental result,the test substanceD&C Red No.33 likely to be classified in aquatic chronic catagory 3.
But the BCF value of target substance D&C Red No. 33reported was not >= 500 as well as log Kow value is also not >=4. Thus considering the CLP Criteria for aquatic classification of the substance, it is concluded that substance does not exhibit toxicity toaquatic algae.
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