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EC number: 247-852-1 | CAS number: 26628-22-8
- 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

Flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- pyrophoric solids
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
- Endpoint:
- pyrophoric liquids
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is a solid
- Endpoint:
- substances / mixtures which in contact with water emit flammable gases
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is known to be soluble in water to form a stable mixture
- Endpoint:
- flammable gases
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is a solid
- Endpoint:
- flammable solids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-01-13
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.10 (Flammability (Solids))
- Deviations:
- no
- GLP compliance:
- no
- Specific details on test material used for the study:
- Chemical Name: sodium azide, NaN3
CAS No.: 26628-22-8
Molar mass: 65.01 g/mol
Molecular formula: N3Na
Physical state: solid
Purity: 99.3%
Bulk density: 0.86 g/ml
Origin of the sample(s): Island Veer Chemie Private Ltd.
Lot. No. of vendor: SA0801149
Raw material code: R1024
Lot No.: R1024-0077 - Test procedure:
- burning rate test: preliminary screening test
- Remarks on result:
- other: The substance cannot be ignited by ferrocerium sparks. A match or the hot flame of a small gas burner is capable to ignite the substance. After ignition it burns unsteadily with a small yellow flame, white fume, and partially sparkling.
- Key result
- Test procedure:
- other: Burning rate test over 200 mm length
- Burning time:
- 600 s
- Remarks on result:
- other: The pile was ignited at one end with a hot flame of a small gas burner within 15 seconds. After ignition the substance burns slowly, partially incomplete, and with some sparkling.
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Sodium azide can be ignited with a match or a gas burner flame. In the main test, the burning time for a 200 mm pile was 10 minutes. According to the test guideline, a substance can be considered as not flammable, if the burning time exceeds 4 minutes for a 200 mm distance. Moreover, no further testing is then required.
- Executive summary:
The flammability of sodium azide was tested according to EU method A.10 (Flammability (solids)). This comprises a preliminary test in which the test substance is tried to be ignited by spark or flame, and a main test, in which a defined pile of the test substance (250 x 20 x 10 mm, triangular profile) is ignited at the one end and the burning rate over a 200 mm distance is measured.
Sodium azide could be ignited by use of a gas burner flame or a match, but not by a ferrocerium spark.
The burning time for a 200 mm distance of sodium azide was measured to be 10 minutes. According to the test guideline, a substance can be considered as not flammable, if the burning time exceeds 4 minutes for a 200 mm distance, which is the case for sodium azide.
Referenceopen allclose all
PRELIMINARY SCREENNG TEST:
The substance cannot be ignited by ferrocerium sparks. A match or the hot flame of a small gas burner is capable to ignite the substance. After ignition it burns unsteadily with a small yellow flame, white fume, and partially sparkling.
BURNING RATE TEST:
The pile was ignited at one end with a hot flame of a small gas burner within 15 seconds. After ignition the substance burns slowly, partially incomplete, and with some sparkling. For a length of 200 mm a burning time of 10 min was measured.
The substance has not to be considered as a flammable solid.
Description of key information
The flammability of sodium azide was tested according to EU method A.10 (Flammability (solids)). This comprises a preliminary test in which the test substance is tried to be ignited by spark or flame and a main test, in which a defined pile of the test substance (250 x 20 x 10 mm, triangular profile) is ignited at the one end and the burning rate over a 200 mm distance is measured.
Sodium azide could be ignited by use of a gas burner flame or a match, but not by a ferrocerium spark.
The burning time for a 200 mm distance of sodium azide was measured to be 10 minutes. According to the test guideline, a substance can be considered as not flammable, if the burning time exceeds 4 minutes for a 200 mm distance, which is the case for sodium azide.
Key value for chemical safety assessment
- Flammability:
- not classified
Additional information
Justification for classification or non-classification
The burning time for a 200 mm distance of sodium azide was measured to be 10 minutes. According to the test guideline, a substance can be considered as not flammable, if the burning time exceeds 4 minutes for a 200 mm distance, which is the case for sodium azide.
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