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Key value for chemical safety assessment

Effects on fertility

Description of key information

The NOAEL was estimated to be 793.5 mg/kg bw when rats were orally exposed with 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid.  

Thus, as per criteria of CLP regulation, 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid can be not classified for reproductive toxicity. 

Link to relevant study records
Reference
Endpoint:
toxicity to reproduction
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 predicted using OECD QSAR toolbox version 3.3 and the supporting QMRF report has been attached
Qualifier:
according to guideline
Guideline:
other: as below
Principles of method if other than guideline:
Prediction is done using QSAR Toolbox version 3.3
GLP compliance:
not specified
Limit test:
no
Specific details on test material used for the study:
Name: 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid
InChI:1S/C44H35N13O11S3/c45-24-3-12-35(33(47)17-24)54-51-28-5-1-22-15-39(70(63,64)65)41(43(58)31(22)19-28)56-50-27-9-7-26(8-10-27)49-37-14-11-30(21-38(37)69(60,61)62)53-57-42-40(71(66,67)68)16-23-2-6-29(20-32(23)44(42)59)52-55-36-13-4-25(46)18-34(36)48/h1-21,49,58-59H,45-48H2,(H,60,61,62)(H,63,64,65)(H,66,67,68)/b54-51+,55-52+,56-50+,57-53+
Smiles: c1cc(ccc1Nc2ccc(cc2S(=O)(=O)O)/N=N/c3c(cc4ccc(cc4c3O)/N=N/c5ccc(cc5N)N)S(=O)(=O)O)/N=N/c6c(cc7ccc(cc7c6O)/N=N/c8ccc(cc8N)N)S(=O)(=O)O
- Molecular formula (if other than submission substance):C44H35N13O11S3
- Molecular weight (if other than submission substance):1018.0385 g/mole
- Substance type:Organic
Species:
rat
Strain:
Wistar
Sex:
male/female
Route of administration:
oral: feed
Type of inhalation exposure (if applicable):
not specified
Vehicle:
other: Diet
Details on exposure:
not specified
Details on mating procedure:
not specified
Analytical verification of doses or concentrations:
not specified
Details on analytical verification of doses or concentrations:
not specified
Duration of treatment / exposure:
22 months
Frequency of treatment:
daily
Dose / conc.:
793.5 mg/kg bw/day
No. of animals per sex per dose:
7 males and 50 females per group (mating: males 6/dose; females 48/dose)
Control animals:
yes, plain diet
Details on study design:
not specified
Positive control:
not specified
Parental animals: Observations and examinations:
not specified
Oestrous cyclicity (parental animals):
not specified
Sperm parameters (parental animals):
not specified
Litter observations:
not specified
Postmortem examinations (parental animals):
not specified
Postmortem examinations (offspring):
not specified
Statistics:
not specified
Reproductive indices:
not specified
Offspring viability indices:
not specified
Clinical signs:
not specified
Dermal irritation (if dermal study):
not specified
Mortality:
not specified
Body weight and weight changes:
not specified
Food consumption and compound intake (if feeding study):
not specified
Food efficiency:
not specified
Water consumption and compound intake (if drinking water study):
not specified
Ophthalmological findings:
not specified
Haematological findings:
not specified
Clinical biochemistry findings:
not specified
Urinalysis findings:
not specified
Behaviour (functional findings):
not specified
Immunological findings:
not specified
Organ weight findings including organ / body weight ratios:
not specified
Histopathological findings: non-neoplastic:
not specified
Histopathological findings: neoplastic:
not specified
Other effects:
not specified
Reproductive function: oestrous cycle:
not specified
Reproductive function: sperm measures:
not specified
Reproductive performance:
not specified
Dose descriptor:
NOAEL
Effect level:
793.5 mg/kg bw/day
Based on:
test mat.
Sex:
male/female
Basis for effect level:
reproductive performance
Remarks on result:
other: No effect observed
Critical effects observed:
not specified
System:
other: not specified
Organ:
not specified
Treatment related:
not specified
Dose response relationship:
not specified
Relevant for humans:
not specified
Clinical signs:
no effects observed
Dermal irritation (if dermal study):
not specified
Mortality / viability:
no mortality observed
Body weight and weight changes:
not specified
Food consumption and compound intake (if feeding study):
not specified
Food efficiency:
not specified
Water consumption and compound intake (if drinking water study):
not specified
Ophthalmological findings:
not specified
Haematological findings:
not specified
Clinical biochemistry findings:
not specified
Urinalysis findings:
not specified
Sexual maturation:
not specified
Organ weight findings including organ / body weight ratios:
not specified
Gross pathological findings:
no effects observed
Histopathological findings:
not specified
Other effects:
not specified
Behaviour (functional findings):
not specified
Developmental immunotoxicity:
not specified
Dose descriptor:
other: not specified
Generation:
other: not specified
Based on:
not specified
Sex:
not specified
Basis for effect level:
other: not specified
Remarks on result:
other: not specified
Critical effects observed:
not specified
System:
other: not specified
Organ:
not specified
Treatment related:
not specified
Dose response relationship:
not specified
Relevant for humans:
not specified
Reproductive effects observed:
not specified
Treatment related:
not specified
Relation to other toxic effects:
not specified
Dose response relationship:
not specified
Relevant for humans:
not specified

The prediction was based on dataset comprised from the following descriptors: NOAEL
Estimation method: Takes average 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 ( not "n") )  )  and "o" )  and ("p" and ( not "q") )  )  and ("r" and "s" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Amine OR Aromatic compound OR Azo compound OR Hydroxy compound OR Phenol OR Primary amine OR Primary aromatic amine OR Secondary amine OR Secondary aromatic amine OR Sulfonic acid OR Sulfonic acid derivative by Organic functional groups, Norbert Haider (checkmol) ONLY

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Alcohol, olefinic attach [-OH] OR Aliphatic Nitrogen, one aromatic attach [-N] OR Aliphatic Nitrogen, two aromatic attach [-N-] OR Aromatic Carbon [C] OR Azo [-N=N-] OR Hydroxy, aromatic attach [-OH] OR Hydroxy, sulfur attach [-OH] OR Miscellaneous sulfide (=S) or oxide (=O) OR Nitrogen, two or tree olefinic attach [>N-] OR Olefinic carbon [=CH- or =C<] OR Oxygen, one aromatic attach [-O-] OR Suflur {v+4} or {v+6} OR Sulfinic acid [-S(=O)OH] OR Sulfonate, aromatic attach [-SO2-O] by Organic functional groups (US EPA) ONLY

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Aminoaniline, meta OR Aromatic amine OR Aryl OR Azo OR Fused carbocyclic aromatic OR Overlapping groups OR Phenol OR Sulfonic acid by Organic Functional groups (nested) ONLY

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Aminoaniline, meta OR Aniline OR Aromatic amine OR Aryl OR Azo OR Fused carbocyclic aromatic OR Naphtalene OR Phenol OR Sulfonic acid by Organic Functional groups ONLY

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as No alert found by DNA binding by OASIS v.1.3

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as Michael addition OR Michael addition >> Quinone type compounds OR Michael addition >> Quinone type compounds >> Quinone methides OR Radical OR Radical >> Radical mechanism via ROS formation (indirect) OR Radical >> Radical mechanism via ROS formation (indirect) >> Single-Ring Substituted Primary Aromatic Amines OR Radical >> ROS formation after GSH depletion OR Radical >> ROS formation after GSH depletion >> Quinone methides OR SN1 OR SN1 >> Alkylation after metabolically formed carbenium ion species OR SN1 >> Alkylation after metabolically formed carbenium ion species >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN2 OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as Non binder, MW>500 by Estrogen Receptor Binding

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as Non binder, without OH or NH2 group by Estrogen Receptor Binding

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as Non binder, MW>500 by Estrogen Receptor Binding

Domain logical expression index: "j"

Referential boundary: The target chemical should be classified as Weak binder, OH group by Estrogen Receptor Binding

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as Non binder, MW>500 by Estrogen Receptor Binding

Domain logical expression index: "l"

Referential boundary: The target chemical should be classified as Strong binder, OH group by Estrogen Receptor Binding

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Non-Metals by Groups of elements

Domain logical expression index: "n"

Referential boundary: The target chemical should be classified as Halogens by Groups of elements

Domain logical expression index: "o"

Referential boundary: The target chemical should be classified as Aminoaniline, meta AND Aniline AND Aromatic amine AND Aryl AND Azo AND Fused carbocyclic aromatic AND Naphtalene AND Phenol AND Sulfonic acid by Organic Functional groups ONLY

Domain logical expression index: "p"

Referential boundary: The target chemical should be classified as Not categorized by Repeated dose (HESS)

Domain logical expression index: "q"

Referential boundary: The target chemical should be classified as Oxyphenistain (Hepatotoxicity) Alert by Repeated dose (HESS)

Domain logical expression index: "r"

Parametric boundary:The target chemical should have a value of log Kow which is >= -4.28

Domain logical expression index: "s"

Parametric boundary:The target chemical should have a value of log Kow which is <= 9.1

Conclusions:
The NOAEL was estimated to be 793.5 mg/kg bw when rats were orally exposed with 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid.
Executive summary:

In a prediction done by SSS (2018) using the OECD QSAR toolbox with log kow as the primary descriptor, the reproductive toxicity was estimated for 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid. The NOAEL was estimated to be 793.5 mg/kg bw when rats were orally exposed with 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid.  

Effect on fertility: via oral route
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
NOAEL
793.5 mg/kg bw/day
Study duration:
subchronic
Species:
rat
Quality of whole database:
Data is Klimisch 2 and from OECD QSAR toolbox
Effect on fertility: via inhalation route
Endpoint conclusion:
no study available
Effect on fertility: via dermal route
Endpoint conclusion:
no study available
Additional information

Reproductive toxicity:

In different studies, 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid has been investigated for reproductive toxicity to a greater or lesser extent. Often are the studies based on in vivo experiments and estimated data in rodents, i.e. most commonly in rats for 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid along with the study available on structurally similar read across substance Black PN (CAS no 2519-30-4). The predicted data using the OECD QSAR toolbox has also been compared with the experimental studies.

In a prediction done by SSS (2018) using the OECD QSAR toolbox with log kow as the primary descriptor, the reproductive toxicity was estimated for 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid. The NOAEL was estimated to be 793.5 mg/kg bw when rats were orally exposed with 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid.  

In another experimental study conducted by Gaunt et al (Food and Cosmetics Toxicology Volume 5, 1967, Pages 171-177) on structurally similar read across substance Black PN (CAS no 2519-30-4), male and female rat were treated with Black PN in the concentration of 0,300, 1000 and 3000 mg/kg bw orally in feed for 90 days. No significant changes were observed at any dose level in both treated male and female rats compare to control. Except for two females, one was from control group and other was from 300 mg/kg/day showed unaccountable tremors and ataxia. They were killed at day 17. The nervous disorder observed in two female rats at an early stage of the experiment cannot be attributed to Black PN since the two animals were in the control and lowest level groups, respectively. Moreover, no comparable effect was seen after more prolonged treatment or at 3000 mg/kg bw. Significant growth retardation was observed in males at the 3000 mg/kg/day level and it associated with a reduced food intake. No effect on Hematology, clinical chemistry and urine analysis of treated male and female rats were observed as compared to control. In addition, there were significant increase in the relative weights of the testes and kidneys at the dose level of 3000 mg/kg/day in treated male was observed as compare to control. The elevated relative kidney weights were not accompanied by changes in the kidney function tests or in organ pathology. Decrease liver weight was also observed in 1000 and 3000 mg/kg/day in treated female rat as compare to control. Decreased liver weight in these instances arose from the fact that autopsles were performed late in the day, so that the animals were not fasted overnight, in accordance with the standard procedure but were only fasted during the day. No significant change in the female gonads weight was observed. Significant change was observed in the foci of inflammatory cell infiltration of the myocardium in treated males at 3000 mg/kg/day. The foci of inflammatory cell infiltration of the myocardium which occurred occasionally in males of the 3000 mg/kg/day group were of spontaneous origin. Similar Historical control data was found in the Wilens & Sproul (1938) study. Therefore, NOAEL was considered to be 1000 mg/kg bw for male and 3000 mg/kg bw for female rats when treated with Black PN orally in feed for 90 days.

Further supported by experimental study conducted by Gaunt et al (Food and Cosmetics Toxicology Volume 5, 1967, Pages 171-177) on structurally similar read across substance Black PN (CAS no 2519-30-4), CFE male and female rats were treated with Black PN in the concentration of 0, 50, 250 and 500 mg/kg bw orally in feed for 2 years. The fur and faeces of the rats fed diets containing Black PN were coloured black. There was no black colour in urine collected free of faecal or other contamination. No mortality, no change in body weight and food consumption was observed in treated rats as compared to control. Similarly, No adverse haematological changes were seen in either sex or at any dose level up to 12 months. At week 82, the hemoglobin concentration and packed cell volume were reduced in females at 500 mg/kg bw. These effects were not found after 2 yr, although at this time this group showed a reduction in the total leucocyte count. The terminal hemoglobin concentration and packed cell volume of male rats were reduced at all dietary levels. No effect on biochemical analyses of serum, urine or of the renal concentration test were observed in treated rats as compared to control. In addition, There were no statistically significant differences between the absolute organ weights of control rats and those of rats fed diets containing Black PN However, in male rats, the relative liver weights were significantly higher in all treated groups (0,50, 250 and 500 mg/kg bw) than in the controls. No changes in reproductive organ of treated male and female rats were observed as compared to control. No significant change were observed in histopathology of treated group when compare to control group at all dose level. No carcinogenic effect was observed in treated animal compare to control group. Therefore, NOAEL was considered to be 500 mg/kg bw when CFE male and female rats were treated with Black PN orally in feed for 2 years.

Thus, based on the above study and predictions on 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid and its read across substances, it can be concluded that NOAEL value is 793.5 mg/kg bw with no effect on reproduction. Thus, as per criteria of CLP regulation, 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid can be not classified for reproductive toxicity. 

Effects on developmental toxicity

Effect on developmental toxicity: via oral route
Endpoint conclusion:
no study available
Effect on developmental toxicity: via inhalation route
Endpoint conclusion:
no study available
Effect on developmental toxicity: via dermal route
Endpoint conclusion:
no study available

Justification for classification or non-classification

Based on the above study and predictions on 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid and its read across substances, it can be concluded that NOAEL value is 793.5 mg/kg bw with no effect on reproduction. Thus, as per criteria of CLP regulation, 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid can be not classified for reproductive toxicity. 

Additional information

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