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EC number: 228-412-8 | CAS number: 6262-07-3
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Repeated dose toxicity: oral
Administrative data
- Endpoint:
- short-term repeated dose toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13.01.2016 – 20.06.2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 422 (Combined Repeated Dose Toxicity Study with the Reproduction / Developmental Toxicity Screening Test)
- Version / remarks:
- Adopted by the Council on 28th July 2015
- Deviations:
- yes
- Remarks:
- see Any other information ...
- GLP compliance:
- yes (incl. QA statement)
- Limit test:
- no
Test material
- Reference substance name:
- Disodium 6-hydroxy-5-[[4-[[4-(phenylamino)-3-sulphonatophenyl]azo]naphthyl]azo]naphthalene-2-sulphonate
- EC Number:
- 228-412-8
- EC Name:
- Disodium 6-hydroxy-5-[[4-[[4-(phenylamino)-3-sulphonatophenyl]azo]naphthyl]azo]naphthalene-2-sulphonate
- Cas Number:
- 6262-07-3
- Molecular formula:
- C32H23N5O7S2.2Na
- IUPAC Name:
- disodium 6-hydroxy-5-[[4-[[4-(phenylamino)-3-sulphonatophenyl]azo]naphthyl]azo]naphthalene-2-sulphonate
- Reference substance name:
- Sodium chloride
- EC Number:
- 231-598-3
- EC Name:
- Sodium chloride
- Cas Number:
- 7647-14-5
- Molecular formula:
- ClNa
- IUPAC Name:
- sodium chloride
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Name of test material (as cited in study report): Acid Black 26- Other name: Midlonová čerň VL, Rybacid Black VL- Lot/batch No.: 5008- Expiration date of the lot/batch: 09/2017 - Storage condition of test material: The test substance should be stored in dry room in dark in closed container at the room temperature.
Constituent 1
impurity 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL- Source and lot/batch No.of test material: by Sponsor, Batch No. 5008- Expiration date of the lot/batch: 09/2017- Storage condition of test material: The test substance was stored in dry and dark place at room temperature- Stability under test conditions:testing laboratory analysis of homogeneity and stability: the both application forms (1000 mg 10 mL and 10 mg /10 mL) of the test substance, Acid Black 26, at defined laboratory conditions (laboratory temperature, preparation of solution by defined manner) are homogenous and stable at least for 120 minutes from the finalization of application form preparation.TREATMENT OF TEST MATERIAL PRIOR TO TESTING- Treatment of test material prior to testing: see below Details on oral exposureFORM AS APPLIED IN THE TEST (if different from that of starting material)solution in water for injection
Test animals
- Species:
- rat
- Strain:
- Wistar
- Remarks:
- CRL (SPF quality - guaranteed)
- Details on species / strain selection:
- - according to guideline- random selection according to the internal rule – at the beginning of the study the weight variation of animals in groups of each sex did not exceed ± 20% of the mean weight
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS- Source: Charles River SPF breeding, supplied via VELAZ s.r.o., Czech Republic, RČH CZ 11760500- Females (if applicable) nulliparous and non-pregnant: yes- Age at study initiation: sexually adult, 7-9 weeks on arrival- Weight at study initiation: males 412 - 426 g, females 248 - 357 g- Fasting period before study: no- Housing: SPF conditions according to internal SOP No.12; sterilized soft wood fibers Lignocel;Animal per cage: 2 rats of the same sex in one cage in pre-mating period, during mating period – 1 M + 1 F in one cage, pregnant females – individually, offspring – with mother, satellite animals - 2 rats of the same sex in one cage;- Diet (e.g. ad libitum): complete pelleted diet for rats and mice in SPF breeding - Altromin for Rats/Mice, Manufacturer: Altromin Spezialfutter GmbH & Co. KG, Germany- Water (e.g. ad libitum): ad libitum; quality corresponding to the Regulation No. 252/2004 of Czech Coll. of Law- Acclimation period: 12 days (DRFE 5 days)ENVIRONMENTAL CONDITIONS- Temperature (°C): 22±3- Humidity (%): 30-70- Air changes (per hr): approximately 15 air changes per hour- Photoperiod (hrs dark / hrs light): 12 /12STUDY TIME SCHEDULEAdministration (from 22.03.2016)Parental males (totally 49 days of administration):1st day – 14th day (pre-exposure period) → 15th day - 28th day (pre-mating period, administration ) → 29th day – 42nd day ( mating ) → 43rd day – 63rd day (administration period) → 64th day (necropsy) Satellite males (totally 49 days of administration + 14 days of observation):1st day – 14th day (pre-exposure period) → 15th day - 63rd day (administration period) → 64th day - 77th day (observation period) → 78th day (necropsy)Parental females:1st day – 14th day (pre-exposure period) → 15th day - 28th day (pre-mating period, administration ) → 29th day – 42nd day (mating)→ gestation → lactation → day 12 post partum Satellite females (totally 49 days of administration + 14 days of observation):1st day – 14th day (pre-exposure period) → 15th day - 63rd day (administration period) → 64th day - 77th day (observation period) → 78th day (necropsy)Non-pregnant females (without evidence of copulation):1st day – 14th day (pre-exposure period) → 15th day - 28th day (pre-mating period, administration ) → 29th day – 42nd day (mating) → 25 days after the end of mating period Non-pregnant females (with evidence of copulation):1st day – 14th day (pre-exposure period) → 15th day - 28th day (pre-mating period, administration ) → 29th day – 42nd day (mating) → 25th day after confirmed matingObservationsUrinalysis: only males – 63rd and 77th day of studyBlood collection for haematology and biochemistry: parental males – 64th day of study satellite males – 78th day of studyparental females - 13th day of lactation periodpups – 2 pups per litter – 4th day of lactation; 2 pups per litter – 13th day of lactationsatellite females – 78th day of studyNecropsy: parental males – 64th day of studysatellite males – 78th day of studyparental females - 13th day of lactation periodpups – 2 pups per litter – 4th day of lactation, other pups - 13th day of lactationsatellite females – 78th day of studynon-pregnant females – 26th day after the end of mating period or confirmed matingEnd of histopathological examination: till 11. 10. 2016
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- water
- Details on oral exposure:
- PREPARATION OF DOSING SOLUTIONS:The test substance was weighted into glass beaker and the beaker was replenished by water for injections. The test solution was dissolved in ultrasonic bath for a 30 minutes and then the solution was stirred by magnetic stirrer (750 rpm) for 40 minutes. Taking of the test substance was performed at reduced speed - 300 rpm. The concentrations of solution at all dose levels were adjusted to ensure the administration of 1 mL per 100 g of body weight. For each dose level concentration, the solution was prepared separately. The application forms were prepared daily just before administration. The administration of the test substance to animals was performed during one hour after preparation of application form. The stirring of solutions continued during administration.VEHICLE - Lot/batch no.: 1505050287; exp. 5/2017 - Concentration in vehicle:The concentrations of solution at all dose levels were adjusted to ensure the administration of 1 mL per 100 g of body weight.
- Analytical verification of doses or concentrations:
- no
- Details on analytical verification of doses or concentrations:
- Only stability and homogeneity were determined by means of measuring of a peak area of the test substance by a liquid chromatography based on a method developed at the test facility.
- Duration of treatment / exposure:
- The treated groups were administered daily for the following periods: males and females – 2 weeks prior to the mating period and during the mating periodpregnant females – during pregnancy and till the 12th day of lactationmales – after mating period – totally for 49 daysnonpregnant females (mated females without parturition) – for 25 days after the confirmed matingnon-mated females – for 25 days after the end of mating period
- Frequency of treatment:
- 7 days per week at the same time
Doses / concentrationsopen allclose all
- Dose / conc.:
- 250 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 500 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 1 000 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 0 mg/kg bw/day (actual dose received)
- Remarks:
- (vehicle only)
- No. of animals per sex per dose:
- 12 females and 12 males per group, 6 males and 6 females per satellite group
- Control animals:
- yes, concurrent vehicle
- Details on study design:
- - Dose selection rationale: The dose levels for study were determined on the basis of results of a dose-range finding experiment. - Post-exposure recovery period in satellite groups: 14 days
Examinations
- Observations and examinations performed and frequency:
- HEALTH CONDITION CONTROL: Yes - Time schedule: daily - during the acclimatization and the experimental partMORTALITY CONTROL: - Time schedule: twice dailyCLINICAL OBSERVATIONS: Yes males and females - daily during the administration period in natural conditions in cagesDETAILED CLINICAL OBSERVATIONS: Yes - Time schedule: before the first application and then weekly (except the mating period)FUNCTIONAL OBSERVATIONS: Yes - Time schedule: at the end of administration / observation periodNEUROBEHAVIOURAL EXAMINATION: Yes- Time schedule for examinations: at the end of administration / observation period- Dose groups that were examined: 6 males and 6 females of each group and in satellite males and females- Battery of functions tested: sensory activity / grip strength / motor activityBODY WEIGHT: Yes- Time schedule for examinations:males - the first day of administration and then weekly,females - the first day of administration and then weekly in premating and mating period, during pregnancy: 0., 7th, 14th, 20th day, during lactation: 1st, 4th, 12th and 13th day,satellite males and females - the first day of administration and then weekly.FOOD CONSUMPTION: - Food consumption determined and group mean daily diet consumption calculated as g food/animal/day: Yes- Time schedule: weekly and on the same days as body weight (except the mating period); satellite males and females – weeklyFOOD EFFICIENCY:- Body weight gain in g/food consumption in g per unit time X 100 calculated as time-weighted averages from the consumption and body weight gain data: YesTime schedule: males - weekly (except the mating period), females - weekly during premating period, during pregnancy and lactation – on the same days as body weight, satellite males and females – weeklyWATER CONSUMPTION: Yes- Time schedule for examinations: twice a week (only in satellite animals)HAEMATOLOGY: Yes- Time schedule for collection of blood: at the end of administration (M) / observation period (satellite M,F)- Anaesthetic used for blood collection: Yes, light ether narcosis- Animals fasted: Yes- How many animals: 6 males and 6 females of each group and in satellite males and females- Parameters checked in table [No.3; tables in the attached document] were examined.CLINICAL CHEMISTRY: Yes - Time schedule for collection of blood: at the end of administration (M, non-pregnant F) / observation period (satellite M,F)- Animals fasted: Yes- How many animals: 6 males and 6 females of each group and in satellite males and females- Parameters checked in table [No.4] were examined.URINALYSIS: Yes- Time schedule for collection of urine: the last day of administration / observation period – only males- Metabolism cages used for collection of urine: Yes- Animals fasted: Not specified- Parameters checked in table [No.2] were examined.
- Sacrifice and pathology:
- GROSS PATHOLOGY: Yes revision of the external surface of the body, of all orifices and the cranial, thoracic and abdominal cavities and biometry of organsHISTOPATHOLOGY: Yes (see table [No.5] Organs for histopathological examination). In Repeated dose toxicity part of study the full histopathology of the preserved organs and tissues was performed for all high dose and satellite animals. Organs with macroscopical changes and kidneys, stomach, small intestine, large intestine and caecum were examined at the lowest and middle dose level groups used for Repeated Dose Toxicity part of study.
- Statistics:
- For statistical evaluation the software Statgraphic ® Centurion (version XV, USA) was used. Males/females from control group were compared with males/females from three treated groups. Satellite males/females from control group were compared with satellite males/females from treated group. The results statistically significant on probability level 0.05 were indicated in the summary tables in report.
Results and discussion
Results of examinations
- Clinical signs:
- no effects observed
- Description (incidence and severity):
- Excrements in treated animals were thinner consistency and coloured by the test substance. After the end of application of the test substance this clinical symptom disappeared.
- Mortality:
- no mortality observed
- Description (incidence):
- Only non-treatment-related accident: Female No.166 (at the dose level 1000 mg/kg/day) died on the 39th day of application due to intubation error.
- Body weight and weight changes:
- no effects observed
- Food consumption and compound intake (if feeding study):
- no effects observed
- Food efficiency:
- no effects observed
- Water consumption and compound intake (if drinking water study):
- no effects observed
- Ophthalmological findings:
- not examined
- Haematological findings:
- effects observed, treatment-related
- Description (incidence and severity):
- Haematological examination of males and females showed altered value of reticulocytes. This is probably related to adaptation organism to the test substance treatment. Others haematological parameters of red blood line were not changed.
- Clinical biochemistry findings:
- effects observed, treatment-related
- Description (incidence and severity):
- In satellite females the value of creatinine found during the biochemical examination was changed. This value of creatinine in satellite females were out in historical control limit and can be related with histopathological findings of kidneys. Others changes of biochemical parameters observed during biochemical examination were without toxicological importance and they are related with adaptation of organism to the test substance treatment.
- Urinalysis findings:
- no effects observed
- Behaviour (functional findings):
- no effects observed
- Immunological findings:
- not examined
- Organ weight findings including organ / body weight ratios:
- no effects observed
- Gross pathological findings:
- no effects observed
- Neuropathological findings:
- no effects observed
- Histopathological findings: non-neoplastic:
- effects observed, treatment-related
- Description (incidence and severity):
- A serious kidneys chronic progressive nephropathy was found out. The influence of the test substance on kidneys could not be excluded because the intensity of chronic progressive nephropathy in kidneys irreversibly increased with dose level. Occurrence microscopic findings of stomach and/or intestines (eosinophile infiltration of mucosa and/or lamina propria) related with place of application (digestive tract) and disappear during recovery period.
- Histopathological findings: neoplastic:
- not examined
Effect levels
- Key result
- Dose descriptor:
- NOAEL
- Effect level:
- 500 mg/kg bw/day (actual dose received)
- Based on:
- test mat.
- Sex:
- male/female
- Basis for effect level:
- clinical biochemistry
- histopathology: non-neoplastic
Target system / organ toxicity
- Key result
- Critical effects observed:
- no
Any other information on results incl. tables
Deviations: During the study, short increases of temperature (22.05.2016 - for ten hour, temperature from 25.2 to 26.4°C and 23.05.2016 for two hours, temperature from 25.2 to 25.4°C) in animal room was recorded. This microclimatic deviation did not affect the welfare of animals and had no impact on the results of the study.No other deviations from study plan or test guidelines were observed during the study performance.
Applicant's summary and conclusion
- Conclusions:
- The value of NOAEL (No Observed Adverse Effect Level) for REPEATED DOSE TOXICITY was established as 500 mg/kg body weight/day both for MALES and FEMALES. The value of NOAEL was determined on the basis of increased intensity of chronic progressive nephropathy in kidneys in both sexes (dose dependent). In females also delayed increased value of creatinine was recorded (out historical control limits). The NOAEL (No Observed Adverse Effect Level) for REPRODUCTION and DEVELOPMENT was established as 1000 mg/kg body weight/day.
- Executive summary:
Introduction
The test substance, Acid Black 26, was tested for reproduction and subacute toxicity using the OECD Test Guideline No. 422: Combined Repeated Dose Toxicity Study with the Reproduction/Developmental Toxicity Screening Test, Adopted by the Council on 28th July 2015.
Methods
Wistar rats of SPF quality were used for testing. The test substance was administered in the form of solution in water for injection. Oral application by stomach tube was performed daily. The study includes four main groups and two satellite groups of animals. Each main group consisted of 12 males and 12 females; each satellite group consisted of 6 males and 6 females. Main groups contained 3 treated groups (doses 250, 500, 1000 mg/kg of body weight /day) and one control group (vehicle only). The satellite groups contained one control group (vehicle only) and one treated group (1000 mg/kg/day). The dose levels for study were determined on the basis of results of a dose-range finding experiment (see the Annex 2) and approved by Sponsor.
The treated groups were administered daily for the following periods:
males and females – 2 weeks prior to the mating period and during the mating period,
pregnant females – during pregnancy and till the 12th day of lactation,
males – after mating period – totally for 49 days,
nonpregnant females (mated females without parturition) – for 25 days after the confirmed mating,
non-mated females – for 25 days after the end of mating period
After the end of administration period the animals of main groups were sacrificed and satellite animals were observed for the next 14 days without treatment.
During the study clinical observation and health status controls were performed daily. The body weight and food consumption were measured weekly. Detailed clinical observation was carried out weekly. The functional observation was performed at the end of application and observation period. Vaginal smears were prepared daily, 2 weeks before start of administration period (oestrous cycle monitoring), during the mating period (until the presence of spermatozoa) and at necropsy day. Reproduction parameters relevant to pups (number of pups, weight of litters, weight, sex and vitality of pups, measurement of anogenital distance, nipple retention) were also recorded.
The study was finished by urinalysis, haematological and biochemical analysis and gross necropsy of animals. In all males of main groups the sperm parameters, sperm motility and sperm morphology were examined. The selected organs from parental animals and pups were removed for weighing and histopathological examination.
Results
Repeated oral administration of Acid Black 26 to rats by gavage at the dose levels of 250, 500 and 1000 mg/kg/day did not cause any mortality.
Repeated Dose Toxicity part of study:
The dose level 250 mg/kg/day – No changes during health condition control and clinical observation were observed (except thinner consistency of excrements and coloured of excrements). Body weight and body weight increments of treated animals were not significantly affected by the test substance administration.
In females increased value of total erythrocyte count was recorded during the haematological examination (but in range of historical control).
Decreased value of albumin in males and decreased value of urea in females was detected during the biochemical examination but all values were in range of historical control.
No significant changes of organs were recorded during the biometry of organs, macroscopic examination and histopathological examination.
The dose level 500 mg/kg/day – No changes during health condition control and clinical observation were observed (except thinner consistency of excrements and coloured of excrements). Body weight and body weight increments of treated animals were not significantly affected by the test substance administration.
During examination of urine in males significant increased pH of urine was recorded.
During the haematological examination the following statistically significant changes were detected: increased value of reticulocytes in both sexes and prolonged APTT in males. These parametres were in range of historical control limits.
In females increased value of cholesterol total and decreased value of urea was recorded during the biochemical examination (but in range of historical control).
No significant changes of organs were recorded during the biometry of organs, macroscopic examination and histopathological examination.
The dose level 1000 mg/kg/day - No significant changes during health condition control and clinical observation were observed (except thinner consistency of excrements and coloured of excrements).
Body weight and body weight increments of treated animals were adequate to species, sex and age of animals in experiment.
During examination of urine in males significant increased pH of urine was recorded.
Haematological examination showed irreversible prolonged APTT, reversible increased value of reticulocytes in males and increased value of monocytes, increased value of reticulocytes, delayed decreased value of reticulocytes and prolonged APTT in females.
Reversible increased value of albumin and potassium ions in males and reversible decreased activity of ALP, increased value of cholesterol total, delayed increased value of creatinine in females (above historical control limits) were recorded during the biochemical examination.
During the macroscopic examination coloured content in stomach and intestines was detected but these after end of administration of the test substance disappeared.
Histopathological examination showed eosinophil infiltration of mucosa and/or lamina propria in stomach and intestines in males. These related with place of application (digestive tract) and disappear during recovery period. In kidneys higher intensity of chronic progressive nephropathy in both sexes was found out – the influence of the test substance could not be excluded.
Conclusion
The value of NOAEL (No Observed Adverse Effect Level) for REPEATED DOSE TOXICITY was established as 500 mg/kg body weight/day both for MALES and FEMALES. The value of NOAEL was determined on the basis of increased intensity of chronic progressive nephropathy in kidneys in both sexes (dose dependent). In females also delayed increased value of creatinine was recorded (out historical control limits).
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