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Diss Factsheets
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EC number: 947-147-5 | 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
![](https://chesar.echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Endpoint summary
Administrative data
Description of key information
The acute oral toxicity of the substance, the Reaction mass of disodium N,N’-[(2-hydroxy-5-nonylphen-1,3-ylene)bis(methylene)]bis[N-methylaminoacetate] and sodium N-[(2-hydroxy-5-nonylphenyl)methyl]-N-methylaminoacetate the has been investigated in female Wistar rats a fixed dose procedure acute oral toxicity study conducted according to OECD TG 420. The acute oral LD50 of the substance was determined to be > 2000 mg/kg bw. No acute toxicity studies have been carried out via the inhalation or dermal routes. A waiver is proposed for acute inhalation toxicity based on the physiochemical properties of the substance. Additionally, a waiver is proposed for acute dermal toxicity based on the low acute oral toxicity of the substance.
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:
- Experimental Start: 23 October 2018 Experimental Completion: 13 November 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Annex VIII Data Requirement
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 420 (Acute Oral Toxicity - Fixed Dose Method)
- Version / remarks:
- 2001
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test type:
- fixed dose procedure
- Limit test:
- yes
- Species:
- rat
- Strain:
- Wistar
- Sex:
- female
- Details on test animals or test system and environmental conditions:
- Female Wistar (RccHan™:WIST) strain rats were supplied by Envigo RMS (UK) Limited, Oxon, UK. The females were nulliparous and non-pregnant. After an acclimatization period of at least 5 days the animals were selected at random and given a number unique within the study by indelible ink-marking on the tail and a number written on a cage card. At the start of the study the animals were 8 to 12 weeks of age. The body weight variation did not exceed ±20% of the mean body weight at the start of treatment.
The animals were housed in groups of up to four in suspended solid-floor polypropylene cages furnished with woodflakes. With the exception of an overnight fast immediately before dosing and for approximately 3 to 4 hours after dosing, free access to mains drinking water and food (2014C Teklad Global Rodent diet supplied by Envigo RMS (UK) Limited, Oxon, UK) was allowed throughout the study. The diet, drinking water and bedding were routinely analyzed and were considered not to contain any contaminants that would reasonably be expected to affect the purpose or integrity of the study.
The temperature and relative humidity were set to achieve limits of 19 to 25 °C and 30 to 70% respectively. The rate of air exchange was at least fifteen changes per hour and the lighting was controlled by a time switch to give 12 hours continuous light and 12 hours darkness. - Route of administration:
- oral: gavage
- Vehicle:
- arachis oil
- Details on oral exposure:
- All animals were dosed once only by gavage, using a metal cannula attached to a graduated syringe. The volume administered to each animal was calculated according to the fasted body weight at the time of dosing. Treatment of animals was sequential. Sufficient time was allowed between each dose group to confirm the survival of the previously dosed animals. The dose volume was 10 mL/kg.
- Doses:
- 300 mg/kg - 1 female
2000 mg/kg - 1 female
2000 mg/kg - 4 females - No. of animals per sex per dose:
- 300 mg/kg - 1 female
2000 mg/kg - 5 females - Control animals:
- no
- Details on study design:
- All animals were dosed once only by gavage, using a metal cannula attached to a graduated syringe. The volume administered to each animal was calculated according to the fasted body weight at the time of dosing. Treatment of animals was sequential. Sufficient time was allowed between each dose group to confirm the survival of the previously dosed animals.
Clinical observations were made 30 minutes, 1, 2, and 4 hours after dosing and then daily for up to 14 days. Morbidity and mortality checks were made twice daily, early and late during normal working days, and once daily at weekends and public holidays.
Individual body weights were recorded on Day 0 (the day of dosing) and on Days 7 and 14.
At the end of the observation period the animals were killed by cervical dislocation. All animals were subjected to gross necropsy. This consisted of an external examination and opening of the abdominal and thoracic cavities. The appearance of any macroscopic abnormalities was recorded. No tissues were retained. - Statistics:
- None
- Key result
- Sex:
- female
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Mortality:
- None
- Clinical signs:
- other: Hunched posture was noted in all animals during the day of dosing and persisted in one animal one day after dosing. Noisy respiration was also noted in one animal during the day of dosing.
- Gross pathology:
- NAD
- Other findings:
- None
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The acute oral median lethal dose (LD50) of the test item in the female Wistar strain rat was estimated to be greater than 2000 mg/kg body weight (Globally Harmonized Classification System − Unclassified).
- Executive summary:
Introduction
The study was performed to assess the acute oral toxicity of the test item in the Wistar strain rat.
Methods
Following sighting tests at dose levels of 300 mg/kg and 2000 mg/kg, an additional four fasted female animals were given a single oral dose of test item, as a suspension in arachis oil BP, at a dose level of 2000 mg/kg body weight. Clinical signs and body weight development were monitored during the study. All animals were subjected to gross necropsy.
Results
Mortality:There were no deaths.
Clinical Observations:Hunched posture with or without noisy respiration was noted in all animals treated at a dose level of 2000 mg/kg. No signs of systemic toxicity were noted in the animal treated at a dose level of 300 mg/kg.
Body Weight:Animals showed expected gains in body weight over the observation period except for one animal which showed a body weight loss (approximately 3.4%) over the second week.
Necropsy:No abnormalities were noted at necropsy.
Conclusion
The acute oral median lethal dose (LD50) of the test item in the female Wistar strain rat was estimated to be greater than 2000 mg/kg body weight (Globally Harmonized Classification System − Unclassified).
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 2 000 mg/kg bw
- Quality of whole database:
- Study is GLP compliant and reliable without restrictions.
Acute toxicity: via inhalation route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Acute toxicity: via dermal route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Acute Oral Toxicity
The acute oral toxicity of the substance, the Reaction mass of disodium 2,2'-[(2-hydroxy-5-nonyl-1,3-phenylene)bis[methylene(methylimino)] diacetate and sodium [(2-hydroxy-5-nonylbenzyl)(methyl)amino]acetate, has been investigated in female Wistar rats in an acute oral toxicity study conducted according to OECD TG 420 using the fixed dose procedure. Sighting tests were initially carried out in which two fasted rats where respectively administered the test substance, as a suspension in arachis oil BP, via oral gavage at dose levels of 300 mg/kg and 2000 mg/kg. An additional four fasted female animals were subsequently given a single oral dose of test item, at a dose level of 2000 mg/kg body weight.
No mortalities were reported in the study. Clinical observations of hunched posture with or without noisy respiration were noted in all animals treated at a dose level of 2000 mg/kg. No signs of systemic toxicity were noted in the animal treated at a dose level of 300 mg/kg. Animals showed expected gains in body weight over the observation period except for one animal which showed a body weight loss (approximately 3.4%) over the second week. No abnormalities were noted at necropsy.
The acute oral median lethal dose (LD50) of the substance was determined to be > 2000 mg/kg bw in female Wistar rats. Based on the findings of the study, the substance does not meet the criteria for classification for acute oral toxicity according to Regulation (EC) 1272/2008.
Acute Inhalation Toxicity
No data are available and no studies are required. A waiver is proposed: based on the physicochemical properties of the substance, significant exposures via the inhalation route are unlikely. Furthermore, the substance has low acute toxicity via the oral route and is unlikely to pose as an acute hazard via the inhalation or the dermal routes.
Acute Dermal Toxicity
No data are available and no studies are required. A waiver is proposed based on the low acute oral toxicity of the substance. Substances with low acute oral toxicity are unlikely to present an acute toxicity hazard via the dermal route and testing in this regard is therefore unjustified.
Justification for classification or non-classification
The acute oral median lethal dose (LD50) of the substance was determined to be > 2000 mg/kg bw in female Wistar rats in an acute toxicity study conducted according to OECD TG using the fixed dose procedure. Based on the findings of the study, the substance does not meet the criteria for classification for acute oral toxicity according to Regulation (EC) 1272/2008.
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