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EC number: 269-197-0 | CAS number: 68189-39-9
- 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 Irritation:
The dermal irritation potential of 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated using OECD QSAR toolbox v3.3 with logPow as the primary descriptor.
7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the skin of New Zealand White rabbits.
Based on the estimated results, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to skin and can be classified under the category “Not Classified” as per CLP regulation.
Eye Irritation:
The ocular irritation potential of 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated using OECD QSAR toolbox v3.3 with logPow as the primary descriptor.
7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the eyes of New Zealand White rabbits.
Based on the estimated results, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to eyes and can be classified under the category “Not Classified” as per CLP regulation.
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin irritation: 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
- Specific details on test material used for the study:
- - Name of the test material: 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid
- IUPAC name: 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid
- Molecular formula: C20H19N3O11S3
- Molecular weight: 573.578 g/mol
- Smiles: c1c(c(c(c2ccc(cc12)NC(=O)C)O)\N=N\c1ccc(cc1)S(=O)(=O)CCOS(=O)(=O)O)S(=O)(=O)O
- InChI: 1S/C20H19N3O11S3/c1-12(24)21-15-4-7-17-13(10-15)11-18(36(28,29)30)19(20(17)25)23-22-14-2-5-16(6-3-14)35(26,27)9-8-34-37(31,32)33/h2-7,10-11,25H,8-9H2,1H3,(H,21,24)(H,28,29,30)(H,31,32,33)/b23-22+
- Substance type: Organic
- Physical state: Solid - Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- no data available
- Type of coverage:
- semiocclusive
- Preparation of test site:
- abraded
- Vehicle:
- unchanged (no vehicle)
- Controls:
- not specified
- Amount / concentration applied:
- 500mg
- Duration of treatment / exposure:
- 4 hours
- Observation period:
- 14 days
- Number of animals:
- 3
- Details on study design:
- no data available
- Other effects / acceptance of results:
- no data available
- Irritation parameter:
- overall irritation score
- Basis:
- mean
- Time point:
- 14 d
- Reversibility:
- not specified
- Remarks on result:
- no indication of irritation
- Irritant / corrosive response data:
- No signs of irritation observed
- Interpretation of results:
- other: not irritating
- Conclusions:
- 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the skin of New Zealand White rabbits.
- Executive summary:
The dermal irritation potential of 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated using OECD QSAR toolbox v3.3 with logPow as the primary descriptor.
7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the skin of New Zealand White rabbits.
Based on the estimated results, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to skin and can be classified under the category “Not Classified” as per CLP regulation.
Reference
Estimation
method: Takes mode value from the 5 nearest neighbours
Domain logical expression:Result: In Domain
(((((((("a"
or "b" or "c" or "d" )
and ("e"
and (
not "f")
)
)
and ("g"
and (
not "h")
)
)
and ("i"
and (
not "j")
)
)
and ("k"
and (
not "l")
)
)
and "m" )
and "n" )
and ("o"
and "p" )
)
Domain
logical expression index: "a"
Referential
boundary: The
target chemical should be classified as Vinyl Sulfones by US-EPA New
Chemical Categories
Domain
logical expression index: "b"
Referential
boundary: The
target chemical should be classified as Acylation AND Acylation >> Ester
aminolysis AND Acylation >> Ester aminolysis >> Amides by Protein
binding by OASIS v1.3
Domain
logical expression index: "c"
Referential
boundary: The
target chemical should be classified as Acylation AND Acylation >>
Direct Acylation Involving a Leaving group AND Acylation >> Direct
Acylation Involving a Leaving group >> Acetates by Protein binding by
OECD
Domain
logical expression index: "d"
Referential
boundary: The
target chemical should be classified as Acid moiety AND Amides AND
Phenol Amines AND Phenols by Aquatic toxicity classification by ECOSAR
Domain
logical expression index: "e"
Referential
boundary: The
target chemical should be classified as Non binder, MW>500 by Estrogen
Receptor Binding
Domain
logical expression index: "f"
Referential
boundary: The
target chemical should be classified as Non binder, impaired OH or NH2
group OR Non binder, non cyclic structure OR Non binder, without OH or
NH2 group OR Strong binder, NH2 group OR Strong binder, OH group OR Very
strong binder, OH group OR Weak binder, OH group by Estrogen Receptor
Binding
Domain
logical expression index: "g"
Referential
boundary: The
target chemical should be classified as Not possible to classify
according to these rules (GSH) by Protein binding potency
Domain
logical expression index: "h"
Referential
boundary: The
target chemical should be classified as Extremely reactive (GSH) OR
Extremely reactive (GSH) >> Phenyl acrylate (MA) OR Highly reactive
(GSH) OR Highly reactive (GSH) >> Acrylates (MA) by Protein binding
potency
Domain
logical expression index: "i"
Referential
boundary: The
target chemical should be classified as No alert found by Protein
binding alerts for skin sensitization by OASIS v1.3
Domain
logical expression index: "j"
Referential
boundary: The
target chemical should be classified as Acylation OR Acylation >> Direct
acylation involving a leaving group OR Acylation >> Direct acylation
involving a leaving group >> (Thio)Acyl and (thio)carbamoyl halides and
cyanides OR Acylation >> Direct acylation involving a leaving group >>
Anhydrides (sulphur analogues of anhydrides) OR Acylation >> Direct
acylation involving a leaving group >> Carbamates OR Acylation >> Ester
aminolysis OR Acylation >> Ester aminolysis >> Amides OR Acylation >>
Ester aminolysis or thiolysis OR Acylation >> Ester aminolysis or
thiolysis >> Activated aryl esters OR Nucleophilic addition OR
Nucleophilic addition >> Addition to carbon-hetero double bonds OR
Nucleophilic addition >> Addition to carbon-hetero double bonds >>
Ketones OR Schiff base formation OR Schiff base formation >> Pyrazolones
and Pyrazolidinones derivatives OR Schiff base formation >> Pyrazolones
and Pyrazolidinones derivatives >> Pyrazolones and Pyrazolidinones OR
SN2 OR SN2 >> SN2 Reaction at a sp3 carbon atom OR SN2 >> SN2 Reaction
at a sp3 carbon atom >> Activated alkyl esters and thioesters OR SNAr
OR SNAr >> Nucleophilic aromatic substitution on activated aryl and
heteroaryl compounds OR SNAr >> Nucleophilic aromatic substitution on
activated aryl and heteroaryl compounds >> Activated aryl and heteroaryl
compounds by Protein binding alerts for skin sensitization by OASIS v1.3
Domain
logical expression index: "k"
Referential
boundary: The
target chemical should be classified as (!Undefined)Group All Lipid
Solubility < 0.01 g/kg AND (!Undefined)Group CNS Surface Tension > 62
mN/m AND Group All log Kow < -3.1 AND Group All Melting Point > 200 C
AND Group CNS log Kow < 0.5 AND Group CNS log Kow < -2 AND Group CNS
Melting Point > 120 C AND Group CNS Melting Point > 50 C by Skin
irritation/corrosion Exclusion rules by BfR
Domain
logical expression index: "l"
Referential
boundary: The
target chemical should be classified as (!Undefined)Group C Surface
Tension > 62 mN/m OR (!Undefined)Group CN Lipid Solubility < 0.4 g/kg OR
(!Undefined)Group CNHal Lipid Solubility < 4 g/kg OR (!Undefined)Group
CNHal Lipid Solubility < 400 g/kg OR Group All log Kow > 9 OR Group C
Aqueous Solubility < 0.0001 g/L OR Group C Melting Point > 55 C OR Group
C Molecular Weight > 350 g/mol OR Group C Vapour Pressure < 0.0001 Pa OR
Group CHal log Kow > 4.5 OR Group CHal Melting Point > 65 C OR Group
CHal Molecular Weight > 280 g/mol OR Group CHal Molecular Weight > 370
g/mol OR Group CN Aqueous Solubility < 0.0001 g/L OR Group CN Aqueous
Solubility < 0.1 g/L OR Group CN log Kow > 4.5 OR Group CN log Kow > 5.5
OR Group CN Melting Point > 180 C OR Group CN Molecular Weight > 290
g/mol OR Group CN Molecular Weight > 540 g/mol OR Group CN Vapour
Pressure < 0.001 Pa OR Group CNHal Aqueous Solubility < 0.001 g/L OR
Group CNHal Aqueous Solubility < 0.1 g/L OR Group CNHal log Kow > 3.8 OR
Group CNHal Molecular Weight > 370 g/mol OR Group CNHal Molecular Weight
> 380 g/mol OR Group CNS Molecular Weight > 620 g/mol by Skin
irritation/corrosion Exclusion rules by BfR
Domain
logical expression index: "m"
Similarity
boundary:Target:
CC(=O)Nc1ccc2c(c1)cc(S(O)(=O)=O)c(N=Nc1ccc(S(=O)(=O)CCOS(O)(=O)=O)cc1)c2O
Threshold=10%,
Dice(Atom centered fragments)
Atom type; Count H attached; Hybridization
Domain
logical expression index: "n"
Similarity
boundary:Target:
CC(=O)Nc1ccc2c(c1)cc(S(O)(=O)=O)c(N=Nc1ccc(S(=O)(=O)CCOS(O)(=O)=O)cc1)c2O
Threshold=20%,
Dice(Atom centered fragments)
Atom type; Count H attached; Hybridization
Domain
logical expression index: "o"
Parametric
boundary:The
target chemical should have a value of log Kow which is >= -6.01
Domain
logical expression index: "p"
Parametric
boundary:The
target chemical should have a value of log Kow which is <= -1.85
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: 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 v 3.3 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
- Specific details on test material used for the study:
- - Name of the test material: 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid
- IUPAC name: 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid
- Molecular formula: C20H19N3O11S3
- Molecular weight: 573.578 g/mol
- Smiles: c1c(c(c(c2ccc(cc12)NC(=O)C)O)\N=N\c1ccc(cc1)S(=O)(=O)CCOS(=O)(=O)O)S(=O)(=O)O
- InChI: 1S/C20H19N3O11S3/c1-12(24)21-15-4-7-17-13(10-15)11-18(36(28,29)30)19(20(17)25)23-22-14-2-5-16(6-3-14)35(26,27)9-8-34-37(31,32)33/h2-7,10-11,25H,8-9H2,1H3,(H,21,24)(H,28,29,30)(H,31,32,33)/b23-22+
- Substance type: Organic
- Physical state: Solid - Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or tissues and environmental conditions:
- no data available
- Vehicle:
- unchanged (no vehicle)
- Controls:
- not specified
- Amount / concentration applied:
- no data available
- Duration of treatment / exposure:
- 24 hours
- Observation period (in vivo):
- 72 hours
- Duration of post- treatment incubation (in vitro):
- no data available
- Number of animals or in vitro replicates:
- no data available
- Details on study design:
- no data available
- Other effects / acceptance of results:
- no data available
- Irritation parameter:
- overall irritation score
- Basis:
- mean
- Time point:
- 72 h
- Reversibility:
- not specified
- Remarks on result:
- no indication of irritation
- Irritant / corrosive response data:
- no signs of irritation observed
- Interpretation of results:
- other: not irritating
- Conclusions:
7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the eyes of New Zealand White rabbits.- Executive summary:
The ocular irritation potential of 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated using OECD QSAR toolbox v3.3 with logPow as the primary descriptor.
7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the eyes of New Zealand White rabbits.
Based on the estimated results, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to eyes and can be classified under the category “Not Classified” as per CLP regulation.
Reference
Estimation
method: Takes mode value from the 5 nearest neighbours
Domain logical expression:Result: In Domain
((((((("a"
or "b" or "c" or "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 "o" )
)
Domain
logical expression index: "a"
Referential
boundary: The
target chemical should be classified as Vinyl Sulfones by US-EPA New
Chemical Categories
Domain
logical expression index: "b"
Referential
boundary: The
target chemical should be classified as Acylation AND Acylation >> Ester
aminolysis AND Acylation >> Ester aminolysis >> Amides by Protein
binding by OASIS v1.3
Domain
logical expression index: "c"
Referential
boundary: The
target chemical should be classified as Acylation AND Acylation >>
Direct Acylation Involving a Leaving group AND Acylation >> Direct
Acylation Involving a Leaving group >> Acetates by Protein binding by
OECD
Domain
logical expression index: "d"
Referential
boundary: The
target chemical should be classified as Acid moiety AND Amides AND
Phenol Amines AND Phenols by Aquatic toxicity classification by ECOSAR
Domain
logical expression index: "e"
Referential
boundary: The
target chemical should be classified as No alert found by DNA binding by
OECD ONLY
Domain
logical expression index: "f"
Referential
boundary: The
target chemical should be classified as Non binder, MW>500 by Estrogen
Receptor Binding
Domain
logical expression index: "g"
Referential
boundary: The
target chemical should be classified as Non binder, impaired OH or NH2
group OR Non binder, non cyclic structure OR Non binder, without OH or
NH2 group OR Strong binder, NH2 group OR Strong binder, OH group OR Very
strong binder, OH group by Estrogen Receptor Binding
Domain
logical expression index: "h"
Referential
boundary: The
target chemical should be classified as Aromatic diazo AND Aromatic
N-acyl amine AND H-acceptor-path3-H-acceptor by in vivo mutagenicity
(Micronucleus) alerts by ISS
Domain
logical expression index: "i"
Referential
boundary: The
target chemical should be classified as Hydrazine OR Oxolane OR
Polycyclic Aromatic Hydrocarbons OR Quinones by in vivo mutagenicity
(Micronucleus) alerts by ISS
Domain
logical expression index: "j"
Referential
boundary: The
target chemical should be classified as Not possible to classify
according to these rules by Keratinocyte gene expression
Domain
logical expression index: "k"
Referential
boundary: The
target chemical should be classified as High gene expression OR High
gene expression >> Activated esters OR High gene expression >>
N-Acylamides OR Very high gene expression OR Very high gene expression
>> Activated halo-benzenes by Keratinocyte gene expression
Domain
logical expression index: "l"
Referential
boundary: The
target chemical should be classified as No alert found by Protein
binding alerts for skin sensitization by OASIS v1.3
Domain
logical expression index: "m"
Referential
boundary: The
target chemical should be classified as Acylation OR Acylation >> Ester
aminolysis OR Acylation >> Ester aminolysis >> Amides OR Acylation >>
Ester aminolysis or thiolysis OR Acylation >> Ester aminolysis or
thiolysis >> Activated aryl esters OR SNAr OR SNAr >> Nucleophilic
aromatic substitution on activated aryl and heteroaryl compounds OR SNAr
>> Nucleophilic aromatic substitution on activated aryl and heteroaryl
compounds >> Activated aryl and heteroaryl compounds by Protein binding
alerts for skin sensitization by OASIS v1.3
Domain
logical expression index: "n"
Parametric
boundary:The
target chemical should have a value of log Kow which is >= -4.14
Domain
logical expression index: "o"
Parametric
boundary:The
target chemical should have a value of log Kow which is <= 7.2
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Skin Irritation:
In different studies,7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid has been investigated for potential for dermal irritation to a greater or lesser extent. The studies are based on in vivo experiments in rabbits along with human data for target chemical and its structurally similar read across substances,disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate [CAS: 3734-67-6] and D&C Red 6 [CAS: 5858-81-1].The predicted data using the OECD QSAR toolbox has also been compared with the experimental data.
In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the dermal irritation potential was estimated for7-acetamido-4-hydroxy-3-[(E)-2 -{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid . 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acidwas estimated to beirritating(corrosive) to the skin of New Zealand White rabbits.
This result is supported by the experimental study conductedin an OECD GLP laboratory (Sustainability Support Services (Europe) AB has the letter of access) for thestructurally similar read across substance, disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate [CAS: 3734-67-6].The study was performed as per OECD Guidelines 402 and complying to the GLP procedures.
The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days.
Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.
The overall irritation score of the substance was determined to be 0 and no erythema and edema (skin irritation) were observed at the end of 14 days after patch removal. Hence, it was concluded that disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate was not-Irritating to the skin of rats under the experimental conditions tested .Thus it can be concluded that the substance, disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate can be classified under the category "Not Classified" as per CLP regulation.
These studies are further supported by the experimental study summarized in J. Soc. Cosmet. Chem., 40, 321-333 (November/December 1989); for the structurally similar read across substance, D&C Red 6 [CAS: 5858-81-1]. D&C Red 6 was mixed in propylene glycol at a 9 to 1 dilution for testing unless otherwise indicated (10% concentration). A colony of New Zealand albino rabbits that have genetically good ears and free from mites were used. Three rabbits, weighing two to three kilograms, were used for each assay. Animals were housed singly in suspended cages and fed Purina Rabbit Chow and water ad libitum. Animals were maintained on a 12-hour light and 12-hour dark cycle. A dose of 1 ml of the test material was applied and spread once daily to the entire inner surface of once for five days per week for two weeks. The opposite untreated ear of each animal served as an untreated control.
The irritancy produced by repeated application of the chemical on the surface epidermis in the rabbit ear is evaluated on a scale of 0 to 5. The grades are summarized as follows:
0 = No irritation; 1 = few scales, no Erythema; 2 = diffuse scaling, no Erythema; 3 = Generalized scaling with Erythema; 4 = Scaling, Erythema and Edema; 5 = Epidermal necrosis and slough.
D&C Red 6 falls under Grade 0 (no irritation observed).
Based on the available data for the target and read across substances and applying the weight of evidence approach, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to skin.Comparing the above annotations with the criteria of CLP regulation, it can be classified under the category “Not Classified”.
Eye Irritation:
In different studies, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid has been investigated for potential for ocular irritation to a greater or lesser extent. The studies are based on in vivo experiments along with predicted data for target chemical and its structurally similar read across substances,D&C Red 6 [CAS: 5858-81-1] and disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate[CAS:3567-66-6].The predicted data using the OECD QSAR toolbox has also been compared with the experimental data.
In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the ocular irritation potential was estimated for 7-acetamido-4-hydroxy-3-[(E)-2-{4 -[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid . 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid was estimated to be not irritating to the eyes of New Zealand White rabbits.
This result is supported by the experimental study summarized in GESTIS SUBSTANCE Database (information system in hazardous substance of the Berufsgenossenscheftn), 2017;for the structurally similar read across substance, D&C Red 6 [CAS: 5858-81-1]. Each rabbit received 2 installation of 0.2 ml of a 10% D & C Red No. 6 aqueous suspension into the conjunctival sac of rabbits 5 times per week for 4 weeks. The chemical produced only minimal irritative effects after 2 hours which could not confirmed the irritation potential. Hence, on the basis of findings the chemical D & C Red No. 6 (CAS no: 5858-81-1) can be considered as not irritating to the rabbits’ eye.
These results are further supported by the experimental study summarized in Scientific Committee on Consumer Safety (SCCS)-SCCP/1102/07; for the structurally similar read across substance, disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate[CAS:3567-66-6]. 0.2 ml of a 10% aqueous solution (20 mg) or suspension of the test material was applied twice daily, five times weekly, for four weeks to the conjunctival sac of one eye of each of a group of six or more albino rabbits (40 applications). One hour after each application, the eyes were examined for evidence of staining and the irritation was scored according to Draize.
The overall irritation score after 20 days of observation was 0.0. Hence, disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate was considered to be not irritating to rabbit eyes.
Based on the available data for the target and read across substances and applying the weight of evidence approach, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be considered to be not irritating to eyes.Comparing the above annotations with the criteria of CLP regulation, it can be classified under the category “Not Classified”.
Justification for classification or non-classification
Based on the available information, 7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acidis not likely to cause any irritation to eyes and skin.
Hence,7-acetamido-4-hydroxy-3-[(E)-2-{4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonic acid can be classified under the category “Not Classified” as per CLP regulation.
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