Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 701-138-0 | CAS number: 242482-67-3
- 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)
Acute Toxicity: oral
Administrative data
- Endpoint:
- acute toxicity: oral
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- From 11 APR 1996 to 02 MAY 1996
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study
- Justification for type of information:
- REPORTING FORMAT FOR THE ANALOGUE APPROACH
[Please provide information for all of the points below. Indicate if further information is included as attachment to the same record, or elsewhere in the dataset (insert links in 'Cross-reference' table)]
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
[Describe why the read-across can be performed (e.g. common functional group(s), common precursor(s)/breakdown product(s) or common mechanism(s) of action]
It is hypothesized that the target chemical and the following chemical as source chemicals should exhibit comparable toxicity profiles:
• 6-(isononanoylamino)hexanoic acid
•
It is proposed to use the toxicity data of the mentioned source chemicals to fulfill the data requirement for the target chemical on the human health endpoint. The chemical is the corresponding acid of the target chemical.
The underlying scientific rationale for the use of corresponding acid as source chemical is apparent. The target chemical is the 2,2`,2``-nitrilotriethanol (TEA) salt of the source chemical. The source chemical is a weak acid due to the terminal carboxylic acid moiety and can be neutralized/dissolved in aqueous system by reaction with base such as TEA. The target chemical can be formally described as carboxylate of the source chemical. As the carboxylate and carboxylic acid are inter-convertible, it is apparent that source and target chemicals are inter-convertible and should exhibit comparable toxicity profile. The base 2,2`,2``-nitrilotriethanol is a well-investigated substance and is considered to be less relevant for the toxicological assessment.
The proposed approach applies for all exposure routes (oral/dermal/inhalation), because both the target chemical and source chemicals are expected to be bioavailable by all exposure routes and the systemic release of the presumed metabolite is less dependent on exposure route.
2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
[Provide here, if relevant, additional information to that included in the Test material section of the source and target records]
Target chemical:
6-(isononanoylamino)hexanoic acid, compound with 2,2`,2``-nitrilotriethanol; CAS: 85702-79-0
Source chemicals:
6-(Isononanoylamino)hexanoic acid; CAS: 71902-23-3
The target chemical is a mono-substituent substance, the analytical purity being >99%. The source chemical is the raw materials (6-(isononanoylamino) hexanoic acid) of the target chemical. A toxicity difference due to different impurity profiles is not likely to occur.
3. ANALOGUE APPROACH JUSTIFICATION
[Summarise here based on available experimental data how these results verify that the read-across is justified]
Justification for the use of 6-(isononanoylamino)hexanoic acid as source chemical:
- The target chemical is an ionic compound that results from the neutralization reaction of the given source chemical and 2,2`,2``-nitrilotriethanol. When it is dissolved in an aqueous system or in a biological fluid, an immediate dissociation occurs to give the source chemical and the base, thereby explaining the expected comparable toxicity profile to that of target chemical.
A significant toxicity contribution of 2,2`,2``-nitrilotriethanol is not expected. 2,2`,2``-nitrilotriethanol is a well investigated substance. It is of low toxicity and the available kinetic data are demonstrative of efficient elimination mechanisms in animal models.
- In order to verify the expected toxicity comparability, the given source and the target chemicals were investigated under identical testing conditions. Both substances exhibited comparable findings after 7-day oral application to rat:
liver and kidney enlargement
decrease of eosinophil counts
peroxisome proliferation in the liver
The decrease of eosinophil counts is possibly a transient effect, associated with the peroxisome proliferation stimulating effect of test compounds. No such findings were present after 28-day treatment of the target chemical.
- Comparable findings were obtained in the 28-day oral toxicity study for the target chemical and in the above mentioned two 7-day repeated oral toxicity studies with the source and the target substance. Further special histopathological investigation revealed the alpha-2u-globulin accumulation in male kidneys and the peroxisome proliferation in liver.
4. DATA MATRIX
Data matrix and other information see the attached read-across justification in chapter 13
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1996
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 401 (Acute Oral Toxicity)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.1 (Acute Toxicity (Oral))
- Deviations:
- no
- GLP compliance:
- yes
- Remarks:
- according to Principles of Good Laboratory Practice, annex of paragraph 19a, section 1 of the chemical law of July 25, 1994
- Test type:
- standard acute method
- Limit test:
- yes
Test material
- Reference substance name:
- 6-[(1-oxomethyloctyl)amino]hexanoic acid
- EC Number:
- 276-173-3
- EC Name:
- 6-[(1-oxomethyloctyl)amino]hexanoic acid
- Cas Number:
- 71902-23-3
- Molecular formula:
- C15H29NO3
- IUPAC Name:
- 6-(3,5,5-trimethylhexanamido)hexanoic acid
- Test material form:
- solid: crystalline
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Hoechst Aktiengesellschaft, Kastengrund, SPF breeding colony, Germany
- Age at study initiation: male animals approximately 7 weeks; female animals approximately 8 weeks
- Weight at study initiation: males mean: 182 g; females mean: 172 g
- Fasting period before study: from about 16 hours before to 3 - 4 hours after treatment
- Housing: in fully air-conditioned rooms in macrolon cages (type 4) on soft wood granulate in groups of 5 animals
- Diet: ssniff R/M-H (V 1534), ad libitum
- Water: tap water, ad libitum
- Acclimation period: at least one day (breeding at identical conditions)
ENVIRONMENTAL CONDITIONS
- Temperature (°C):22 +/- 3
- Humidity (%): 50 +/- 20
- Air changes (per hr): fully air conditioned rooms
- Photoperiod (hrs dark / hrs light):12/12
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- other: starch mucilage (potato starch in deionised water)
- Details on oral exposure:
- VEHICLE
- Concentration in vehicle: 20% suspension in 2% starch mucilage
- Amount of vehicle (if gavage): 10 mL/kg bw - Doses:
- 2000 mg/kg body weight
- No. of animals per sex per dose:
- 5
- Control animals:
- no
- Details on study design:
- - Duration of observation period following administration: 14 days
- Frequency of observations: symptoms were recorded twice every day (in the morning and in the afternoon), on weekends and public holidays only once.
- Frequency of and weighing: weekly
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight
Results and discussion
Effect levels
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Remarks on result:
- other: no animal died during the 14-day observation period
- Mortality:
- No deaths occurred during the whole study.
- Clinical signs:
- other: The following clinical signs were observed after the application of the test material: sunken flanks, squatting posture, decreased spontaneous activity, irregular respiration, stilted and uncoordinated gait. The clinical symptoms had reversed 6 to 8 hours
- Gross pathology:
- The animals killed at the end of the observation period showed no macroscopically visible changes.
Applicant's summary and conclusion
- Interpretation of results:
- not classified
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- Single oral application of 2000 mg test substance per kg body weight via gavage did not cause lethality in male and female Wistar-rats during the 14 day observation period, resulting in a LD50 > 2000 mg/kg bw.
- Executive summary:
10 Wistar-rats (5 males and 5 females) were subjected to test acute oral toxicity. The test substance was administered by gavage at a dose of 2000 mg/kg body weight (vehicle starch mucilage). Body weight development was not impaired, general clinical signs observed were reversible within 8 hours after substance application and there were no macroscopically visible changes found. No animal died during the 14 day observation period, resulting in a LD50 > 2000 mg/kg bw.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
![ECHA](/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/echa_logo.png)