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Diss Factsheets
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EC number: 200-655-4 | CAS number: 67-48-1
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- > 250 °C
- Atm. press.:
- 1 013 hPa
- Decomposition:
- yes
- Decomp. temp.:
- > 300 °C
- Conclusions:
- No unambiguous melting temperature was found up to 200°C via DSC, in addition no melting point found up to 250 °C via capillary tube method. From 300 °C decomposition is observed.
- Executive summary:
The melting point of the substance was assessed in a non-GLP study according to OECD guideline 102 via differential scanning calometry and with the capillary tube method.
No unambiguous melting temperature was found up to 200°C via DSC, in addition no melting point found up to 250 °C via capillary tube method. From 300 °C decomposition is observed.
Reference
No unambiguous melting temperature was found up to 200°C, even when there is an endothermic peak at 68 to 80°C (Test 2). The existence of a crystallisation peak during the cooling and the nearly identical endothermic peak in the following heating run might be taken as a proof for the melting of the sample. But the optical check of the samples after the heating and cooling cycles did not show any indication for a flow of the granules.
This is in accordance with the measurement in a capillary tube in a metal block, an also applicable method to determine the melting temperature according OECD 102.
This test was performed at GMC/V, where no melting point was found up to 250°C (see section 2.2).:
"The capillary was inserted at a temperature of +50°C, heating rate: 25°C/min up to +250°C. The test item was analyzed twice.
No melting point was observed (Melting point > +250°C) "
Also an additional test in a test tube with a hot air blower showed no melting of the test item up to its decomposition (change to brown colour) after a long heating at higher temperature. With these additional observations, the endothermic curve was interpreted as a melting in, but not as the melting of the sample.
"To survey the thermic behaviour of the test item a preliminary TG/DTA-Test (non-ISO 9001) was run up to 700°C. An endothermic peak starting at about 300°C with the weight loss up to about 85% shows the vaporization / decomposition of the test item."
Description of key information
The melting point of the substance was assessed in a non-GLP study according to OECD guideline 102 via differential scanning calometry and with the capillary tube method.
No unambiguous melting temperature was found up to 200 °C via DSC, in addition no melting point found up to 250 °C via capillary tube method. From 300 °C decomposition is observed.
Key value for chemical safety assessment
Additional information
A supporting study was performed on the substance contaminated with beet pulp equivalent to OECD Guideline 102 using differential thermal analysis (BASF, 1983). The first signs of an exothermal reaction were denoted at ca. 110 °C, whereas the maximum of this reaction was ca. 200 °C. An additional exothermic reaction took place at about 250 °C with a maximum at 300 °C. This study supports the fact, that the substance decomposes at higher temperatures.
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