Registration Dossier
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EC number: 202-895-5 | CAS number: 100-85-6
- 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

Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 15 March 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The substance can be produced through different process routes, yielding solutions in water or organic solvent (e.g. methanol or ethylene glycol).
It was initially unclear how to register the substance (mono-constituent or multi-constituent substance) and which manufactured substance to test to fulfil the REACH data requirements. After consultation with the ECHA helpdesk, the test program was started with the manufactured substance of the Lead registrant (solvent: methanol) in which the highest amount of solvent could be removed without causing degradation of the substance. This resulted in the selection of a solution of 56-57% BTMAOH in methanol as test substance.
During the course of the test program, and in order to aid meaningful risk assessment, after consultation with ECHA and upon ECHA's recommendation, it was considered to be more appropriate to test the water-based manufactured substance. As a consequence, some testing was performed with a BTMAOH solution in methanol, and some testing was performed with a BTMAOH solution in water.
The current entry reflects a test performed with a water-based test solution.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report Date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- OECD harmonised ring method
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
- Test material form:
- liquid
- Details on test material:
- Appearance: Clear almost colourless liquid
Test item storage: At room temperature
Stable under storage conditions until: 30 November 2020 (expiry date)
Results and discussion
Surface tensionopen allclose all
- Key result
- Surface tension:
- 74.7 mN/m
- Temp.:
- 20 °C
- Remarks on result:
- other: Conc.= 1 g/L (corrected for the water content)
- Key result
- Surface tension:
- 75.3 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
Any other information on results incl. tables
Table 1: Surface tension measurements at 1 g/L (corrected for the water content)
Measurement | Time passed after transfer test solution to test vessel | Surface tension | ||
individual | mean (1) | mean (2) | ||
1 | 15 | 73.4 | 74.01 | 74.7 |
2 | 16 | 73.8 |
|
|
3 | 17 | 73.9 |
|
|
4 | 18 | 74.3 |
|
|
5 | 19 | 74.2 |
|
|
6 | 20 | 74.0 |
|
|
(1) Mean calculated from measurements 2 to 6, after equilibrium was reached.
(2) Mean multiplied by the calibration factor and Harkins-Jordan corrected.
Table 2: Surface tension measurements at 1 g/L
Measurement | Time passed after transfer test solution to test vessel | Surface tension | ||
individual | mean | mean (1) | ||
1 | 15 | 74.5 |
|
|
2 | 16 | 74.3 | 74.6 | 75.3 |
3 | 17 | 74.8 |
|
|
4 | 18 | 74.8 |
|
|
5 | 19 | 74.8 |
|
|
(1) Mean multiplied by the calibration factor and Harkins-Jordan corrected.
Applicant's summary and conclusion
- Conclusions:
- The surface tension of a solution of 1 g/L of Benzyltrimethylammonium hydroxide in water was determined to be 74.7 mN/m (at 20°C).
The surface tension of a solution of 0.2 g/L of Benzyltrimethylammonium hydroxide in water was determined to be 75.3 mN/m (at 20°C). - Executive summary:
The OECD harmonized ring method (EC A.5 and OECD 115) was performed (GLP-compliant study). Two test solutions were prepared from aqueous test material containing Benzyltrimethylammonium hydroxide: 1 g/L and 0.2 g/L.
The surface tension of solution of 1 g/L of Benzyltrimethylammonium hydroxide in water was determined to be 74.7 mN/m (at 20°C).
The surface tension of solution of 0.2 g/L of Benzyltrimethylammonium hydroxide in water was determined to be 75.3 mN/m (at 20°C).
According to the EC A.5 guideline Benzyltrimethylammonium hydroxide is not surface active.
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.
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