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EC number: 607-957-9 | CAS number: 26567-10-2
- 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
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 014
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
Test material
- Reference substance name:
- 3,3',5,5'-tetramethyl-[1,1'-biphenyl]-2,2'-diol
- EC Number:
- 607-957-9
- Cas Number:
- 26567-10-2
- Molecular formula:
- C16 H18 O2
- IUPAC Name:
- 3,3',5,5'-tetramethyl-[1,1'-biphenyl]-2,2'-diol
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- 137.2 °C
Any other information on results incl. tables
The melting point was determined by differential scanning calorimetry (DSC). In the preliminary DSC screening a melting point of 135.0 °C (onset) was measured. Based on this result, the temperature range to be examined in the main test was set to 90°C – 190°C.
The test was performed with a heat flux differential scanning calorimeter. Details of the DSC experiment are summarized in the table below.
Parameters Test 1 / Pre-Test Test 2 Test 3
System DSC 822 DSC 822 DSC 822
Start Temp. [°C] 25 90 90
Rate (heating 1) [K/min] 10 10 10
End Temp. [°C] 400 190 190
Rate (cooling) [°C/min] --- -10 -10
End Temp. [°C] --- 90 90
Rate (heating 2) [°C/min --- 10 10
End Temp. [°C] --- 190 190
Crucible type aluminium, high aluminium, high aluminium, high
Open / Sealed open (perforated) sealed sealed
Test atmosphere air air air
Air pressure ambient --- ---
Amount [mg] 12.26 15.04 21.4
Mass loss [mg] / [%] 10.59 / 86 0.00 / --- 0.00 / ---
The solid test item was weighed into an aluminium crucible and was measured against a sealed reference aluminium crucible filled with 16.58 mg aluminium oxide. The sample crucible was sealed at ambient atmosphere (air) and then the test program was started.
For the calculation of the melting point only the values measured in the second heating step were taken into account. The values of the first heating step show a deviation of more than ± 0.5°C which is caused by the fact that the test item powder was not compressed in the measuring crucible. Therefore the contact to the bottom of the aluminium crucible was different resulting in a different heat transfer in the first heating step. Once the material was melted for the first time, the contact to the bottom of the crucible is equivalent for both samples and the found melting points are almost identical. Despite the higher deviation in the first heating step the cyclic measurement shows that the melting reaction is a reversible process.
Applicant's summary and conclusion
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