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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
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- An aqueous sodium azide solution was evaporated on one side of a quartz tube. The tube was sealed on the vacuum line and heated for 24 hours at a temperature of 200 °C to remove water vapour.
- GLP compliance:
- no
- Remarks:
- GLP was not existing at the time of publication (1933).
- Light source:
- other: Mercury arc lamp
- Light spectrum: wavelength in nm:
- < 405
- Details on test conditions:
- No data
- Reference substance:
- not specified
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Sodium azide was found to decompose by light of wavelengths below 405 nm.
- Executive summary:
Solid Sodium azide was found to be decomposed photochemically by wavelengths below approximately 405 nm. The rate of decomposition was directly proportional to the light intensity.
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- no guideline followed
- GLP compliance:
- not specified
- Light source:
- other: high pressure mercury-arc lamp
- Light spectrum: wavelength in nm:
- 254
- Relative light intensity:
- 90
- Quantum yield (for direct photolysis):
- 0
- Validity criteria fulfilled:
- no
- Conclusions:
- The quantum yield is only 0.001 using the full output of a high-pressure mercury arc lamp (254 nm). Therefore, direct photolysis is reported to have no influence on natural degradation of sodium azide.
- Executive summary:
The quantum yield is only 0.001 using the full output of a high-pressure mercury arc lamp (254 nm). Therefore, direct photolysis is reported to have no influence on natural degradation of sodium azide.
Referenceopen allclose all
Distance of source |
1/D² |
Rate of reaction |
Aver. Rate |
Rate × D² |
12.2 cm |
0.00672 |
2 and 3.5 |
2.75 |
409 |
19.35 cm |
0.00267 |
0.96 and 1.03 |
0.995 |
373 |
22.65 cm |
0.00195 |
0.65 and 0.71 |
0.68 |
354 |
33.50 cm |
0.000891 |
0.31 and 0.32 |
0.315 |
353 |
The rate of decomposition with the light from the full mercury arc, was directly proportional to the intensity (see table).
Description of key information
According to Müller and Brous (1933), solid sodium azide was found to be decomposed photochemically by wavelengths below approximately 405 nm. The rate of decomposition was directly proportional to the light intensity. Regarding wavelength of 254 nm no photolysis is reported by Betterton (2003). A phototransformation within the troposphere is not expected.
Key value for chemical safety assessment
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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