Registration Dossier
Registration Dossier
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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
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Diss Factsheets
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EC number: 627-872-0 | CAS number: 1514-82-5
- 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
Skin sensitisation
Administrative data
- Endpoint:
- skin sensitisation: in vitro
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
2-BTP is highly volatile at room temperature and boils slightly below body temperature (e.g. 37°C, c.f. 2-BTP boiling temperature = 34.4°C; refer to dossier section 4.3 for details). Of the three key events in skin sensitisation described by REACH Annex VII Section 8.3.1, two of these events (specifically 8.3.1(b) inflammatory response in keratinocytes and 8.3.1(c) activation of dendritic cells) would be expected to be assessed by in-vitro studies:
EC test method B.60 (also OECD Test Guideline 442D), analysed by the KeratinoSens method involves a 48-hour incubation at 37°C; as the entire incubation step would take place above the boiling temperature of the test material it is highly likely that the test material would predominantly evaporate or otherwise volatilise out of solution and as such the study is not technically feasible.
Analysis of Activation of Dendritic cells as described in OECD Test Guideline 442E similarly describes a number of in-vitro tests, all of which involve incubation of the test substance at 37°C; for the reason described above these tests would similarly not be technically feasible.
It is noted that the in-chemico assessment of Molecular Interaction with Proteins (EC method B.59) is conducted typically at room temperature (c.a. 21°C) and it may be technically possible to conduct this study on 2-BTP. On the basis that at least two out of the three key events listed under Annex VII Section 8.3.1 must be assessed to be positive before a conclusion about Skin Sensitisation may be drawn, this assessment would not provide sufficient information in isolation from the other assessment of key events, and is therefore considered not to be scientifically justified.
According to REACH Annex XI Section 2, in-vitro testing for Skin Sensitisation is waived on the basis that testing is not technically possible.
Data source
Materials and methods
Results and discussion
Applicant's summary and conclusion
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.