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Diss Factsheets
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EC number: 252-156-6 | CAS number: 34690-00-1
- 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
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions, however no formal claim of GLP compliance was made.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Remarks:
- The test item has been determined to undergo decomposition from approximately 80°C.
- Decomp. temp.:
- ca. 80 °C
- Sublimation:
- no
- Conclusions:
- The test item has been determined to undergo decomposition from approximately 80°C in a study using a relevant test method. The result is considered to be reliable.
- Executive summary:
The determination was carried out by differential scanning calorimetry (DSC) using a procedure designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
Conclusion
The test item has been determined to undergo decomposition from approximately 80°C.
Reference
Results
Thermograms and thermographic data can be found in Attachment 1 of this Summary.
Please see results of the visual assessment in the table below:
Table: Results of visual assessment
Reading Number |
Temperature (°C) |
Observations |
1 |
20 |
Test item is a white powder. |
2 |
39 |
No change. |
3 |
71 |
No change. |
4 |
91 |
Test item is a white powder that is shrinking. |
5 |
94 |
Vapour droplets on the capillary tube; test item is still a white powder. |
6 |
103 |
Vapour droplets on the wall of the capillary tube; test item is still a white powder. |
7 |
108 |
Test item is a white powder that is expanding up the capillary tube with vapour droplets still present. |
8 |
116 |
Test item is a white solid inside white bubbles/foam. |
9 |
134 |
Test item is a white solid inside white bubbles/foam; bubbles are becoming larger. |
10 |
152 |
Amount of bubbles have decreased from previous observation. |
11 |
162 |
Test item is a white solid inside white bubbles/foam. |
12 |
174 |
White foam is rising up the capillary tube. |
13 |
238 |
Test item is white foam. |
14 |
255 |
Foam bubbles are bursting. |
15 |
263 |
Small amount of bubbles/foam remaining. |
16 |
281 |
Small amount of foam/bubbles. |
17 |
314 |
Test item has risen up capillary tube and out of sight. |
Description of key information
Melting point (BHMT-H): Decomposition at approximately 80°C (Atwal, 2012).
Key value for chemical safety assessment
Additional information
A decomposition temperature of approximately 80°C was determined for BHMT-H using an appropriate test method. A recent, reliable DSC test demonstrates that the anhydrous form of the acid decomposes from approximately 80°C at 1013 hPa. In addition to the DSC method, a visual assessment was performed by heating an aliquot of the registered substance in a capillary tube from room temperature to 314°C. In the visual assessment, decomposition of the substance was observed from approximately 100°C. The result of the visual assessment indicates that the onset of the endotherm observed at approximately 80°C is likely a result of decomposition of the substance.
Melting point of -8°C was reported for the substance in secondary sources to which no reliability could be assigned; these results likely refer to aqueous solution products.
HMDTMP-H is a named impurity in the registered substance. The melting point of the anhydrous form of the HMDTMP-H was determined using differential scanning calorimetry (DSC) in accordance with EU Method A.1 test method. HMDTMP-H (anhydrous form) was observed to undergo thermal decomposition from approximately 200°C. In addition to the DSC method, a visual assessment was performed by heating an aliquot of HMDTMP-H in a capillary tube from room temperature to 350°C. The visual assessment was performed to assist with the interpretation of the thermographic profiles observed in the DSC. In the visual assessment, HMDTMP-H was observed to undergoes a colour change at approximately the same temperature at which HMDTMP-H starts to melt, i.e. HMDTMP-H undergoes simultaneous melting and decomposition.
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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