Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 243-754-8 | CAS number: 20349-39-7
- 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
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
- Endpoint:
- bioaccumulation in aquatic species, other
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Justification for type of information:
- data is from computational model developed by USEPA.
- Qualifier:
- according to guideline
- Guideline:
- other: Modeling database
- Principles of method if other than guideline:
- BCFBAF Program (v3.00)
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- - Name of test material: Disodium 4-hydroxynaphthalene-2,7-disulphonate
- Common name: 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2)
- Molecular formula: C10H6Na2O7S2
- Molecular weight: 348.2624 g/mol
- Smiles notation: c1cc2c(cc1S(=O)(=O)[O-])cc(cc2O)S(=O)(=O)[O-].[Na+].[Na+]
- InChl: 1S/C10H8O7S2.2Na/c11-10-5-8(19(15,16)17)4-6-3-7(18(12,13)14)1-2-9(6)10;;/h1-5,11H,(H,12,13,14)(H,15,16,17);;/q;2*+1/p-2
- Substance type: Organic - Radiolabelling:
- not specified
- Vehicle:
- not specified
- Test organisms (species):
- other: Fish
- Route of exposure:
- aqueous
- Test type:
- other: estimated
- Water / sediment media type:
- natural water: freshwater
- Test temperature:
- 25 deg. C
- Key result
- Temp.:
- 25 °C
- Type:
- BCF
- Value:
- 3.162 L/kg
- Basis:
- whole body w.w.
- Calculation basis:
- other: estimated
- Remarks on result:
- other: Non bioaccumulative
- Validity criteria fulfilled:
- not specified
- Conclusions:
- From BCFBAF Program (v3.00) model of EPI suite the estimated bio concentration factor (BCF) for 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000. Thus it is concluded that the test chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) is not expected to bio accumulate in the aquatic environment.
- Executive summary:
From BCFBAF Program (v3.00) model of EPI suite the estimated bio concentration factor (BCF) for 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000. Thus it is concluded that the test chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) is not expected to bio accumulate in the aquatic environment.
Reference
BCFBAF Program (v3.01) Results:
==============================
SMILES : c12c(O)cc(S(=O)(=O)O)cc1cc(S(=O)(=O)O)cc2
CHEM : 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, disodium salt
MOL FOR: C10 H8 O7 S2
MOL WT : 304.29
--------------------------------- BCFBAF v3.01 --------------------------------
Summary Results:
Log BCF (regression-based estimate): 0.50 (BCF = 3.16 L/kg wet-wt)
Biotransformation Half-Life (days) : 0.00271 (normalized to 10 g fish)
Log BAF (Arnot-Gobas upper trophic): -0.05 (BAF = 0.894 L/kg wet-wt)
Log Kow (experimental): not available from database
Log Kow used by BCF estimates: -1.42
Equation Used to Make BCF estimate:
Log BCF = 0.50 (Ionic; Log Kow dependent)
Estimated Log BCF = 0.500 (BCF = 3.162 L/kg wet-wt)
Description of key information
From BCFBAF Program (v3.00) model of EPI suite the estimated bio concentration factor (BCF) for 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000. Thus it is concluded that the test chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) is not expected to bio accumulate in the aquatic environment.
Key value for chemical safety assessment
- BCF (aquatic species):
- 3.162 L/kg ww
Additional information
Various predicted data for the target compound 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) and supporting weight of evidence study for its read across chemical were reviewed for the bioaccumulation end point which are summarized as below:
First predicted data study done from BCFBAF Program (v3.00) model of EPI suite the estimated bio concentration factor (BCF) for 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) is 3.162 L/kg wet-wt which does not exceed the bioconcentration threshold of 2000.
Another predicted weight of evidence study done by using Bio-concentration Factor (v12.1.0.50374) module of(ACD (Advanced Chemistry Development)/I-Lab predictive module, 2017)the Bio-concentration Factor at range pH 1-14 of the chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2)( CAS no.20349-39-7) estimated to be 1 dimensionless.
Further, predicted data study done from CompTox Chemistry Dashboard using OPERA (OPEn (quantitative) structure-activity Relationship Application) V1.02 model in which calculation based on PaDEL descriptors (calculate molecular descriptors and fingerprints of chemical) the bioaccumulation i.e BCF for test substance 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS no.20349 -39 -7) was estimated to be 2.32 dimensionless it is based on the 5 OECD principles.
In supporting weight of evidence study done from authoritative database ( J check, 2017) the bioaccumulation test was conducted for 6 weeks for determination the bioconcentration factor (BCF) of read across chemical dipotassium 7-hydroxynaphthalene-1,3-disulfonate (CAS no 842-18-2) on test organism Cyprinus carpio. Nominal concentrations used in the study as 1st Concentration area: 1 ppm(w/v), 2nd Concentration area: 0.1 ppm(w/v) and Range finding study was carried out on Rice fish (Oryzias latipes) TLm(48h) = 1000 ppm(w/v). Thus according to static Fish test the BCF value for read across substance dipotassium 7-hydroxynaphthalene-1,3-disulfonate was observed to be ≤0.1 L/kg at dose concentration 1.0 mg/L and ≤ 1.0 L/kg at dose concentration 0.1 mg/L on test organism Cyprinus carpio during 6 weeks period. These BCF values indicate that the read across substance dipotassium 7-hydroxynaphthalene-1,3-disulfonate is not bioaccumulative in fish and food chain.
In another supporting weight of evidence study done from same source as mentioned above ( J check, 2017) the bioaccumulation test was conducted for 6 weeks for determination the bioconcentration factor (BCF) of read across substance Sodium 5-amino-4-hydroxy-7-sulfonaphthalene-2-sulfonate (CAS no 5460-09-3) on test organism Cyprinus carpio. Nominal concentrations used in the study as - 1st Concentration area: 2 mg/L, 2nd Concentration area : 0.2 mg/L and Range finding study was carried out on Rice fish (Oryzias latipes) TLm(48h) 880 ppm(w/v). Thus according to static Fish Test the BCF value for read across substance Sodium 5-amino-4-hydroxy-7-sulfonaphthalene-2-sulfonate was observed to be ≤ 0.3 L/kg at dose concentration 2 ppm(w/v) and ≤ 2.9 L/kg at dose concentration 0.2 ppm(w/v) on test organism Cyprinus carpio during 6 weeks period. These BCF values indicate that the read across chemical Sodium 5-amino-4-hydroxy-7-sulfonaphthalene-2-sulfonate is not bioaccumulative in fish and food chain.
On the basis of above results for target chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS No: 20349-39-7) (from EPI suite, ACD labs, and CompTox Chemistry Dashboard 2017) and for its read across chemicals (From J check) it can be concluded that the BCF value of test substance chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) ranges from 1 to 3.162 dimensionless which does not exceed the bioconcentration threshold of 2000, indicating that the target chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2)is expected to be nonbioaccumulative in the food chain.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.