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EC number: 213-964-4 | CAS number: 1070-00-4
- 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
Explosiveness
Administrative data
Link to relevant study record(s)
- Endpoint:
- explosiveness
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- not reported
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted in accordance with generally accepted scientific principles, possibly with incomplete reporting or methodological deficiencies, which do not affect the quality of the relevant results.
- Principles of method if other than guideline:
- Determination of the thermal stability and the maximum safe handling time at various temperatures of Tri-n-octylaluminum, trade name TNOAL.
The thermal stability is measured by means of Differential Scanning Calorimetry (DSC) and Setaram C80. The maximum safe handling time is the maximum safe time that a compound can be stored or handled at a certain temperature. After this time the temperature of the compound should be decreased immediately. - GLP compliance:
- not specified
- Key result
- Parameter:
- other: More sensitive to shock than m-dinitrobenzene
- Remarks on result:
- not measured/tested
- Key result
- Parameter:
- other: More sensitive to friction than m-dinitrobenzene
- Remarks on result:
- not measured/tested
- Key result
- Parameter:
- other: Explosive under influence of flame
- Remarks on result:
- not measured/tested
- Key result
- Parameter:
- other: Explosive (not specified)
- Remarks on result:
- not measured/tested
- Conclusions:
- Like other Metal Alkyls, TNOAL shows a combined endothermic/exothermic effect. Due to this combination no accurate determination of the decomposition heat is possible from the scan. However during isothermal measurements a total heat production (delta Hexo) of 165 J/g is measured.
For TNOAL the ln C is 29.94 and the activation energy (Ea) is 114.32 kJ/mol, this can be derived from the Arrhenius curve. - Executive summary:
Determination of the thermal stability and the maximum safe handling time at various temperatures of Tri-n-octylaluminum, trade name TNOAL.
The thermal stability is measured by means of Differential Scanning Calorimetry (DSC) and Setaram C80. The maximum safe handling time is the maximum safe time that a compound can be stored or handled at a certain temperature. After this time the temperature of the compound should be decreased immediately.
Like other Metal Alkyls, TNOAL shows a combined endothermic/exothermic effect. Due to this combination no accurate determination of the decomposition heat is possible from the scan. However during isothermal measurements a total heat production (delta Hexo) of 165 J/g is measured.
For TNOAL the ln C is 29.94 and the activation energy (Ea) is 114.32 kJ/mol, this can be derived from the Arrhenius curve.
Reference
The results of the isothermal experiments are presented in table 1.
Table 1: DSC & Setaram isothermal data for TNOAL
Equipment |
Temperature (°C) |
Intake (mg) |
Max. heat production, Qmax(W/kg) |
Setaram |
197.8 |
1156.3 |
2.13 |
Setaram |
222.5 |
1095.6 |
8.89 |
Setaram |
237.4 |
668 |
19.8 |
DSC |
250 |
22.06 |
39.7 |
With the combined DSC and Setaram data an Arrhenius curve is constructed as is visualized in figure 3. The activation energy (Ea) and the Ln C value can be determined with this curve. For TNOAL the ln C is 29.94 and the activation energy (Ea) is 114.32 kJ/mol.
The combination of endothermic and exothermic peak just after each other is observed also for other Metal Alkyls (like DMAL-H. DIBAL-H and TIBAL). The endothermic effect is most probably due to the first step of the decomposition mechanism of the Metal Alkyl.
Safe handling times
DSC and Setaram experiments were performed in order to determine the kinetic parameters of TNOAL. With these kinetic parameters the maximum safe handling times were calculated (see table 2). The maximum safe handling time is ¼ value of the adiabatic induction time. The adiabatic induction time (tad) is the time to maximum decomposition rate under adiabatic circumstances starting at a certain temperature level T1. Recommendations for the safe handling times of TNOAL are given in table 2. A detailed graph with safe handling times at different temperatures is presented in figure 4.
Table 2: Maximum safe handling times at various temperatures for TNOAL:
Temperature (°C) |
Safe Handling Time (hours) |
150 |
23.0 |
160 |
11.4 |
170 |
5.8 |
180 |
3.1 |
190 |
1.7 |
200 |
0.9 |
210 |
0.5 |
220 |
0.3 |
With ln C and Ea, the adiabatic induction times (tsaf,max) were calculated. The maximum safe handling time is derived from the adiabatic induction time:
tsaf,max = ¼ tad
Description of key information
Key value for chemical safety assessment
Additional information
Justification for classification or non-classification
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