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Diss Factsheets
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EC number: 401-700-2 | CAS number: 3100-36-5 CYCLOHEXADECENON; CYCLOHEXADECENONE
- 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:
- from 2021-05-26 to 2021-06-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 25 °C
- Atm. press.:
- 1 001.3 hPa
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting point of the test item was determined to be 25.0 °C.
- Executive summary:
An experimental study was conducted according to Regulation (EC) No 440/2008 Methods A.1. and OECD Test Guidelines 102 to determine the melting point of the test item. The test item was mostly solid, partly molten when it was delivered. In order to take a representative sample, the substance was completely molten at 40 °C and the substance remained liquid at ambient temperature. Therefore, the tests were started with the liquid state of the substance. The crucibles were firstly cooled down at a constant cooling rate of -0.25 K/min to -90 °C. Afterwards, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min under air. During cooling a first exothermic effect was observed at approx. 20 °C and a second between -50 – -70 °C. During heating a first endothermic effect was observed in the temperature range of -70 – -30 °C. A second endothermic effect was detected in the temperature range of 20 – 40 °C. During the heating phase two endothermic effects with corresponding exothermic effects during the cooling phase were observed up to 40 °C, at which the substance is liquid. By visual inspection of the substance cooled to 0.8 °C in a test tube the thermic effect at approx. 20 °C could be identified as freezing and melting effect, respectively. The second effect at approx. -60 °C might be explained by different melting points of cis- and trans-isomers, but was not further investigated in this study. As the onset temperatures in both tests during the warming up do not deviate by more than 0.5 K from their mean value of 24.98 °C, this temperature can be used as melting point. The test item has a melting point of 25.0 °C, which could be confirmed by the visual inspection in a cooled test tube (25 °C).
Reference
DSC-measurements
During cooling a first exothermic effect was observed at approx. 20 °C and a second between -50 – -70 °C. During heating a first endothermic effect was observed in the temperature range of -70 – -30 °C. A second endothermic effect was detected in the temperature range of 20 – 40 °C. Between 220 – 360 °C a third endothermic effect could be detected.
Results of the DSC-measurements during cooling
Sample weight / mg | Onset of Effect / °C | Range of effect / °C | Weight loss / mg | Atmospheric pressure / hPa |
10.70 | 17.89 -60.69 | Approx.. 20 (exo) -50 - -70 (exo) | 10.71 | 1001.3 |
9.52 | 15.55 -57.63 | Approx.. 20 (exo) -50 - -70 (exo) | 9.54 | 1001.3 |
Results of the DSC-measurements during heating
Sample weight / mg | Onset of Effect / °C | Range of effect / °C | Weight loss / mg | Atmospheric pressure / hPa |
10.70 | -63.07 24.57 333.07 | -70 - -30 (endo) 20 - 40 (endo) 220 - 360 (endo) | 10.71 | 1001.3 |
9.52 | -62.21 25.39 336.04 | -70 - -30 (endo) 20 - 40 (endo) 220 - 360 (endo) | 9.54 | 1001.3 |
During the heating phase two endothermic effects with corresponding exothermic effects during the cooling phase were observed up to 40 °C, at which the substance is liquid. By visual inspection of the substance cooled to 0.8 °C in a test tube the thermic effect at approx. 20 °C could be identified as freezing and melting effect, respectively. The second effect at approx. -60 °C might be explained by different melting points of cis- and trans-isomers, but was not further investigated in this study.
As the onset temperatures in both tests during the warming up do not deviate by more than 0.5 K from their mean value of 24.98 °C, this temperature can be used as melting point. The test item has a melting point of 25.0 °C, which could be confirmed by the visual inspection in a cooled test tube (25 °C).
Description of key information
The melting point of the test item was determined to be 25.0 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 25 °C
Additional information
An experimental study was conducted according to Regulation (EC) No 440/2008 Methods A.1. and OECD Test Guidelines 102 to determine the melting point of the test item. The test item was mostly solid, partly molten when it was delivered. In order to take a representative sample, the substance was completely molten at 40 °C and the substance remained liquid at ambient temperature. Therefore, the tests were started with the liquid state of the substance. The crucibles were firstly cooled down at a constant cooling rate of -0.25 K/min to -90 °C. Afterwards, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min under air. During cooling a first exothermic effect was observed at approx. 20 °C and a second between -50 – -70 °C. During heating a first endothermic effect was observed in the temperature range of -70 – -30 °C. A second endothermic effect was detected in the temperature range of 20 – 40 °C. During the heating phase two endothermic effects with corresponding exothermic effects during the cooling phase were observed up to 40 °C, at which the substance is liquid. By visual inspection of the substance cooled to 0.8 °C in a test tube the thermic effect at approx. 20 °C could be identified as freezing and melting effect, respectively. The second effect at approx. -60 °C might be explained by different melting points of cis- and trans-isomers, but was not further investigated in this study. As the onset temperatures in both tests during the warming up do not deviate by more than 0.5 K from their mean value of 24.98 °C, this temperature can be used as melting point. The test item has a melting point of 25.0 °C, which could be confirmed by the visual inspection in a cooled test tube (25 °C).
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