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EC number: 279-075-9 | CAS number: 79135-28-7
- 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
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 103 (Boling point)
- Version / remarks:
- 1995
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 113 (Thermal stability)
- Version / remarks:
- 1981
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Decomposition:
- yes
- Decomp. temp.:
- 220 - 380 °C
- Remarks on result:
- other: - 760 J/g (thermal stability assay)
- Conclusions:
- The test item has no melting point up to its decomposition starting at temperature of ca. 220 °C, as determined by DSC and capillary method.
The test item has no boiling point up to its decomposition starting at temperature of ca. 220 °C, as determined by DSC.
In DSC-measurements, the test item showed an exothermic effect between 220 and 380 °C with an average energy release of -760 J/g. - Executive summary:
Melting and boiling point
Acid Brown 303 has no melting point up to its decomposition starting at a temperature of approx. 220 °C as determined by differential scanning calorimetry (perforated crucible) and capillary method according to OECD guideline 102 (1995).
Acid Brown 303 has no boiling point up to its decomposition starting at a temperature of approx. 220 °C as determined by differential scanning calorimetry according to OECD guideline 103 (1995).
Thermal stability
In the DSC-measurements (closed crucible), Acid Brown 303 showed an exothermic effect between 220 and 380 °C with an average energy release of -760 J/g.
Reference
Melting and boiling point (DSC)
In the thermograms of the DSC runs in a perforated aluminium crucible under air, test item showed first a broad endothermic effect in the temperature range of 90 °C to 210 °C. An exothermic effect could be detected in the temperature range of 290 – 450 °C with an average energy of -620 J/g.
sample weight / mg | range of effect / °C |
weight loss / mg | atm pressure / hPa |
15.4 | 90-210 (endo) 290-460 (exo) |
5 33 % |
1007 |
18.18 | 90-210 (endo) 290-450 (exo) |
5.95 33 % |
1007 |
It is not possible to assign the observed endothermic effect definitely to melting or boiling of the test item.
Due to the fact that the measured weight loss of each sample was approx. 33 % of the initial sample weight, none of the observed endothermic effects can be assigned to boiling of test item. The endothermic effect might be a drying of the test item. The exothermic effect can be attributed to the decomposition of the test item.
Measurements by the capillary method
To verify the results of the DSC measurement, one additional measurement with the capillary method was performed in the temperature range of 25 – 400 °C with a heating rate of 10 K/min. The test item showed no optical change up to a temperature of 210 °C. At a temperature of 250 °C the color of the test item changed to grey / brown. At a temperature of 285 °C the test item is grey and changed its color to dark grey at 340 °C.The measurement was stopped at 400 °C with a black residue solid in the capillary. Neither a melting nor a boiling of the test item could be observed. Due to this fact, it can be stated that the test item has no melting and boiling point up to its decomposition starting at approx. 220 °C.
Thermal stability (DSC)
In the DSC runs, in the temperature range from 220 °C to 380 °C, an exothermic effect could be observed with an average decomposition energy of -760 J/g. After the measurement a black residual of the test item remained in the crucible.
sample weight / mg | start of effect / °C | energy J/g |
4.27 | 220 - 380 | -790 (exothermic) |
4.35 | 220 - 380 | -730 (exothermic) |
Final Results
Melting and boiling point
The test item has no melting point up to its decomposition starting at a temperature of approx. 220 °C as determined by differential scanning calorimetry and capillary method.
The test item has no boiling point up to its decomposition starting at a temperature of approx. 220 °C as determined by differential scanning calorimetry.
Thermal stability
In the DSC-measurements the test item showed an exothermic effect from 220 °C with an average energy release of -760 J/g.
Description of key information
No melting point up to decomposition starting at ca. 210 °C.
Exothermic decomposition between 220 and 380 °C with an average energy release of - 760 J/g.
Key value for chemical safety assessment
Additional information
Melting and boiling point: OECD guideline 102, 103.
Thermal stability: OECD guideline 113.
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