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Reaction mass of sodium(E)-6,7'-carbonylbis(azanediyl)bis(4-hydroxy-3-((E)-phenyldiazenyl) naphthalene-2-sulfonate) and disodium 3-[(4-acetamidophenyl)azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]naphthalene-2-sulphonate and disodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate]
EC number: 939-268-7 | CAS number: -
- 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
Oral toxicity: LD50 > 2000 mg/kg bw
Dermal toxicity: LD50 > 2000 mg/kg bw
Key value for chemical safety assessment
Acute toxicity: via oral route
Link to relevant study records
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 20 march to 10 april 2007
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 420 (Acute Oral Toxicity - Fixed Dose Method)
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- This study was conducted in a facility operating to Good Laboratory Practice within the UK national GLP monitoring programme, but the study report has not been audited by the QA Unit. No formal claim of GLP compliance is made for this study.
- Test type:
- fixed dose procedure
- Limit test:
- yes
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- female
- Route of administration:
- oral: unspecified
- Vehicle:
- arachis oil
- Details on oral exposure:
- VEHICLE
Dose of test material was administrated as a suspension in arachis oil BP at a dose level of 2000 mg/kg body weight - Doses:
- Single oral dose of 2000 mglkg,
- No. of animals per sex per dose:
- 4 females
- Details on study design:
- - Duration of observation period following administration: 14 days
- Necropsy of survivors performed: yes; all animals were subjected to gross necropsy.
- Other examinations performed: Clinical signs and body weight development were monitored during the study. - Sex:
- female
- Dose descriptor:
- discriminating dose
- Effect level:
- ca. 2 000 mg/kg bw
- Based on:
- test mat.
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Remarks on result:
- other: Estimated
- Mortality:
- There were no deaths.
- Clinical signs:
- other: No signs of systemic toxicity were noted during the study.
- Other findings:
- No abnormalities were noted at necropsy.
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The acute oral median lethal dose (LD50) of the test material in the female Sprague-Dawley CD strain rat was estimated to be greater than 2000 mg/kg bodyweight.
The test material was considered to have no significant acute toxic risk if swallowed and did not meet the criteria for classification. - Executive summary:
The study was performed to assess the acute oral toxicity of the test material following a single oral administration in the Sprague-Dawley CD strain rat (SPL Standard Test Method 518.04). The method followed the OECD Guidelines for the Testing of Chemicals No 420 "Acute Oral Toxicity - Fixed Dose Method" (adopted l7 December 2001). The acute oral median lethal dose (LD50) of the test material in the female Sprague-Dawley CD strain rat was estimated to be greater than 2000 mg/kg bodyweight
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 2 000 mg/kg bw
Acute toxicity: via inhalation route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Acute toxicity: via dermal route
Link to relevant study records
- Endpoint:
- acute toxicity: dermal
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 402 (Acute Dermal Toxicity)
- GLP compliance:
- not specified
- Test type:
- standard acute method
- Species:
- rat
- Strain:
- Wistar
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- According to European Union legislation substance of low toxicity (LD50 >2O0O mg/kg b.w.) is not classified to the class of toxicity based on the strength of toxicity in acute exposure conditions.
- Executive summary:
According to European Union legislation, substance of low toxicity (LD50 >2O0O mg/kg b.w.) is not classified to the class of toxicity based on the strength of toxicity in acute exposure conditions.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 2 000 mg/kg bw
Additional information
Direct Red 23 (DR23) is not toxic by oral, dermal and inhalation route. Studies available all confirm that DR23 is not toxic until very high dose.
Acute oral
In all studies, is not identified a 50-letal dose; nevertheless all confirm that DR23 is not toxic at limit fixed for classify in CLP regulation.
Acute inhalation
No study available
Acute dermal
In all studies is not identified a 50-letal dose. The Boruta study (Boruta, 1997) reported an LD50 > 2000 mg/kg tested on DR23. The other studies have been tested on some dyes, structural analogues to DR23. Also in these case has not been identified a limit dose, but all confirm that DR23 is not toxic until high doses, far from limit fixed for classify in CLP regulation.
Justification for selection of acute toxicity – oral endpoint
Study defines a LD50
Justification for selection of acute toxicity – dermal endpoint
Study on Direct Red 23
Justification for classification or non-classification
According to CLP regulation (EC1272/2008) Direct Red 23 is not classified for Acute toxicity.
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