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EC number: 231-971-0 | CAS number: 7782-92-5
- 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
Auto flammability
Administrative data
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Grewer-Oven-Test, VDI 2263-1
- Principles of method if other than guideline:
- The self-heating in air was studied in a screening test according to Grewer (Grewer-Oven-Test, VDI 2263-1). A wire basket (V = 8 cm') was heated in a preheated air stream and any temperature change in the sample centre was measured compared to an inert reference substance (graphite). The heating rate was 1.8 K/min.
In addition to the Grewer-Oven-Test with the pure substance a mixture with Kieselgur (1:1) was tested. Kieselgur prevents the meshes of the basket to be filled with swollen material: air can diffuse into the wire basket during the whole test. Additionally, Kieselgur prevents the wire basket from emptying due to melting of the product. In this case the self-heating of the product in contact with porous material with high specific surface e.g. insulation material or deposits is simulated.
The self-ignition temperature is the temperature at which the temperature rise rate of the test item exceeds the temperature rise rate of the reference (graphite) due to an exothermal effect. - GLP compliance:
- yes
- Remarks:
- the laboratory is GLP certified, but the study was not GLP inspected
Test material
- Reference substance name:
- Sodium amide
- EC Number:
- 231-971-0
- EC Name:
- Sodium amide
- Cas Number:
- 7782-92-5
- Molecular formula:
- H2NNa
- IUPAC Name:
- sodium amide
- Test material form:
- solid: particulate/powder
- Details on test material:
- Natriumamid Pulver
Mat. Nr. 10046758
Batch Nr. GB56701
Purity: >99%
Constituent 1
Results and discussion
Relative self-ignition temperature (solids)
- Key result
- Relative self-ignition temperature:
- >= 90 °C
Any other information on results incl. tables
Due to the fact that the test item melts at ca. 210 °C, an aliquot of the test item was mixed with Kieselgur to prevent the wire basket from emptying. In the screening test with the Kieselgur mixture (1:1) an exothermal reaction was detected starting at 90 °C. Self-heating led to above 550 °C.
Applicant's summary and conclusion
- Conclusions:
- According to the guideline VDI 2263, sheet 1 (Grewer-Oven) self-ignition was observed at 90 °C.
- Executive summary:
In the Grewer-Oven-Test with the Kieselgur mixture (1:1) an exothermal reaction was detected starting at 90 °C. In the DSC measurement (absence of air) an exothermal effect starting at 150 °C was observed.
Due to the fact that the exothermal reaction in the Grewer-Oven-Test started spontaneously it can be derived that the hegt production did not base an hydrolysis due to humidity. Conclusion: The presence of oxygen decreases the thermal stability of the test item.
According to TRAS 410 "Erkennen und Beherrschen exothermer Reaktionen" safe product handling in air is only possible significantly below ambient temperature (100 K safety margin to the self-heating of the Kieselgur mixture in the Grewer-Oven).
The danger of a self-ignition does not exist during the handling under inert conditions. Furthermore, the danger of a dust explosion can also be excluded under these conditions. In this case the product temperature may be raised to the limiting temperature Texo = 50 °C.
lt has to be noted that according to literature, the test item (sodium amide) reacts strongly exothermal with water (hydrolysis) forming sodium hydroxide and ammonia. In contact with oxygen explosive reaction products could be formed.
UN Transport Regulations: Due to the results from the Grewer-Oven-Test further tests are recommended to classify (or exclude) the test item as "self-heating substance" of class 4.2 according to the transport regulations.EU-GHS/CLP: Due to the results from the Grewer-Oven-Test further tests are recommended to classify (or exclude) the test item as "self-heating substance" according to the EU-GHS/CLP regulations.
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