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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 278-189-6 | CAS number: 75314-27-1
- 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
Endpoint summary
Administrative data
Description of key information
Skin Sensitization:
The skin sensitization potential of Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was predicted to be not sensitizing to the skin of female CBA mice.
Key value for chemical safety assessment
Skin sensitisation
Link to relevant study records
- Endpoint:
- skin sensitisation
- Remarks:
- in vivo
- Type of information:
- (Q)SAR
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
- Justification for type of information:
- data is from OECD QSAR toolbox v3.3 and the QMRF report has been attached
- Qualifier:
- according to guideline
- Guideline:
- other: Estimated data
- Principles of method if other than guideline:
- Prediction was done using OECD QSAR toolbox v3.3
- GLP compliance:
- not specified
- Type of study:
- other: Estimated data
- Specific details on test material used for the study:
- - Name of test material: Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)] [6-amino-5- [(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-)
- IUPAC name: Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-)
- Molecular formula: C33H22CoN9O11S2. 2 Na
- Molecular weight: 890 g/mole
- Smiles :Cc1cc(N(=O)=O)c2c(c1)N=N1c3c4ccc(S(O)(=O)=O)cc4ccc3N[Co]{2+}113(Nc4ccc5cc(S(=O)(=O)N C)ccc5c4N1=Nc1ccc(N(=O)=O) cc1O{-}.3).O{-}2Na
- Substance type: Organic
- Physical state: Solid - Species:
- mouse
- Strain:
- CBA
- Sex:
- female
- Details on test animals and environmental conditions:
- no data available
- Vehicle:
- acetone/olive oil (4:1 v/v)
- Concentration:
- 15% w/v
- No. of animals per dose:
- 4
- Details on study design:
- no data available
- Positive control substance(s):
- not specified
- Parameter:
- SI
- Test group / Remarks:
- test group- no reactions observed
- Remarks on result:
- no indication of skin sensitisation based on QSAR/QSPR prediction
- Interpretation of results:
- other: Negative
- Conclusions:
- Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was predicted to be not sensitizing to the skin of female CBA mice.
- Executive summary:
The skin sensitization potential of Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was predicted to be not sensitizing to the skin of female CBA mice.
Reference
The
prediction was based on dataset comprised from the following
descriptors: "Skin Sensitisation"
Estimation method: Takes highest mode value from the 5 nearest neighbours
Domain logical expression:Result: In Domain
((((((((("a"
or "b" )
and ("c"
and (
not "d")
)
)
and "e" )
and ("f"
and (
not "g")
)
)
and ("h"
and (
not "i")
)
)
and ("j"
and (
not "k")
)
)
and ("l"
and (
not "m")
)
)
and ("n"
and (
not "o")
)
)
and ("p"
and "q" )
)
Domain
logical expression index: "a"
Referential
boundary: The
target chemical should be classified as Radical OR Radical >> Radical
mechanism via ROS formation (indirect) OR Radical >> Radical mechanism
via ROS formation (indirect) >> Diazenes OR Radical >> Radical mechanism
via ROS formation (indirect) >> Nitro Azoarenes OR SN1 OR SN1 >>
Nucleophilic attack after reduction and nitrenium ion formation OR SN1
>> Nucleophilic attack after reduction and nitrenium ion formation >>
Nitro Azoarenes by DNA binding by OASIS v.1.3 ONLY
Domain
logical expression index: "b"
Referential
boundary: The
target chemical should be classified as SN1 OR SN1 >> Nitrenium Ion
formation OR SN1 >> Nitrenium Ion formation >> Aromatic azo OR SN1 >>
Nitrenium Ion formation >> Aromatic nitro by DNA binding by OECD ONLY
Domain
logical expression index: "c"
Referential
boundary: The
target chemical should be classified as Non binder, MW>500 by Estrogen
Receptor Binding
Domain
logical expression index: "d"
Referential
boundary: The
target chemical should be classified as Non binder, impaired OH or NH2
group OR Non binder, without OH or NH2 group OR Strong binder, OH group
OR Weak binder, OH group by Estrogen Receptor Binding
Domain
logical expression index: "e"
Similarity
boundary:Target:
CNS(=O)(=O)c1ccc2c(c1)ccc1c2N2=Nc3ccc(N(=O)=O)cc3O{-}.[Co]{2+}223(N1)Nc1ccc4cc(S(=O)(=O)O{-}.[Na]{+})ccc4c1N2=Nc1ccc(N(=O)=O)cc1O{-}.3
Threshold=20%,
Dice(Atom centered fragments)
Atom type; Count H attached; Hybridization
Domain
logical expression index: "f"
Referential
boundary: The
target chemical should be classified as Stable form by Tautomers unstable
Domain
logical expression index: "g"
Referential
boundary: The
target chemical should be classified as Lactim form by Tautomers unstable
Domain
logical expression index: "h"
Referential
boundary: The
target chemical should be classified as Stable form by Tautomers unstable
Domain
logical expression index: "i"
Referential
boundary: The
target chemical should be classified as Cyanamide form OR Enol form by
Tautomers unstable
Domain
logical expression index: "j"
Referential
boundary: The
target chemical should be classified as Aryl AND Cobalt, salt AND Fused
carbocyclic aromatic AND Fused saturated heterocycles AND Heterocyclic
spiro rings AND Naphtalene AND Nitrobenzene AND Phenol AND Sulfonamide
AND Sulfonic acid by Organic Functional groups
Domain
logical expression index: "k"
Referential
boundary: The
target chemical should be classified as Biphenyl by Organic Functional
groups
Domain
logical expression index: "l"
Referential
boundary: The
target chemical should be classified as Aryl AND Cobalt, salt AND Fused
carbocyclic aromatic AND Fused saturated heterocycles AND Heterocyclic
spiro rings AND Naphtalene AND Nitrobenzene AND Phenol AND Sulfonamide
AND Sulfonic acid by Organic Functional groups
Domain
logical expression index: "m"
Referential
boundary: The
target chemical should be classified as Urea derivatives by Organic
Functional groups
Domain
logical expression index: "n"
Referential
boundary: The
target chemical should be classified as Aryl AND Cobalt, salt AND Fused
carbocyclic aromatic AND Fused saturated heterocycles AND Heterocyclic
spiro rings AND Naphtalene AND Nitrobenzene AND Phenol AND Sulfonamide
AND Sulfonic acid by Organic Functional groups
Domain
logical expression index: "o"
Referential
boundary: The
target chemical should be classified as Ketone by Organic Functional
groups
Domain
logical expression index: "p"
Parametric
boundary:The
target chemical should have a value of Molecular weight which is >= 829
Da
Domain
logical expression index: "q"
Parametric
boundary:The
target chemical should have a value of Molecular weight which is <= 931
Da
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not sensitising)
- Additional information:
Skin Sensitization:
Various studies have been investigated to ascertain the degree of dermal sensitization caused by Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) to a greater or lesser extent. The studies are based on in vivo experiments in humans along with predicted data for target chemical and its structurally similar read across chemicals, Disodium 6-hydroxy-5-[(2-methoxy-4-sulphonato-m-tolyl)azo]naphthalene-2-sulphonate(Allura Red AC)[CAS: 25956-17-6] and disodium 4-[(E)-2-(4-methyl-2-sulfophenyl)diazen-1-yl]-3-oxidonaphthalene-2-carboxylate(D&C Red 6)[CAS: 5858-81-1].The predicted data using the OECD QSAR toolbox has also been compared with the experimental data.
The skin sensitization potential of Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) was predicted to be not sensitizing to the skin of female CBA mice.
Draize-Shelanski repeated insult patch test was conducted (487. Allura red AC (WHO Food Additives Series 15), 1981) on 200 human subjects to assess the skin sensitization potential of the structurally similar read across chemical,Disodium 6-hydroxy-5-[(2-methoxy-4-sulphonato-m-tolyl)azo]naphthalene-2-sulphonate(Allura Red AC)[CAS: 25956-17-6]. The chemical applied to the subject’s volvar forearms (200 subjects) as an aqueous solution for 10 alternate days, for 24-hour periods, followed by a 14-day rest period. Challenge batches were then applied under occlusion to fresh skin sites on the subjects scapular backs for 24 hours. The colour did not produce either irritation or allergic responses during the induction phase nor contact dermatitis in the challenge period.
Therefore Allura Red AC dye was considered to be not sensitizing in a Draize-Shelanski repeated insult patch test conducted on 200 human subjects.
The above results are also supported by a series of patch tests performed by Guin JD. (Contact Dermatitis 2003: 49: 217–218) to determine the allergenic potential of the structurally similar read across chemical, disodium 4-[(E)-2-(4-methyl-2-sulfophenyl)diazen-1-yl]-3-oxidonaphthalene-2-carboxylate(D&C Red 6)[CAS: 5858-81-1].The dye was applied on15 patients in Finn Chambers and read first at 2 or (more commonly) 3 days and again at 4–7 days. The reactions of the patients were graded as ‘?+ ‘ , ‘+’ and ‘++’ categories.
None of the treated patients showed any signs of allergic contact dermatitis. Hence, the chemical D & C Red No. 6 (CAS no: 5858-81-1) can be considered as non sensitizer to human skin.
Based on the available data for the target as well as read across substances and applying the weight of evidence approach,Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-)was not sensitizing to skin.Comparing the above annotations with the criteria of CLP regulation, test chemical can be classified under the category “Not Classified”.
Respiratory sensitisation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Justification for classification or non-classification
Available data for Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) indicates that it is not likely to cause any dermal sensitization to skin.
Disodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-N-methylnaphthalene-2-sulphonamidato(2-)][6-amino-5-[(2-hydroxy-4-nitrophenyl) azo]naphthalene-2-sulphonato(3-)]cobaltate(2-) can be considered to be not sensitizer to skin and can be classified under the category “Not Classified” as per CLP regulation.
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.