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EC number: 918-594-3 | CAS number: 7723-14-0
- 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
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 985
- Report date:
- 1085
Materials and methods
- Principles of method if other than guideline:
- 2.0g samples of red phosphorus with butyl rubber (RP/BR) were held in a desiccator at 25°C at different relative humidity’s (87% and 31%). Periodically, samples were removed, weighed, and heated in boiling water, and the aqueous phase was analyzed by titrimetry.
- GLP compliance:
- no
- Type of study / information:
- Oxidation in Air
Test material
- Reference substance name:
- Phosphorus
- EC Number:
- 231-768-7
- EC Name:
- Phosphorus
- Cas Number:
- 7723-14-0
- IUPAC Name:
- phosphine
- Details on test material:
- The powder sample of red phosphorus with butyl rubber was obtained from Aberdeen Proving Grounds. This material is produced as pellets and is
very spongy and hydroscopic. Analysis of eight samples for elemental phosphorus by combustion followed by boiling of the residue in water and
potentiometric titration yielded a phosphorus content of 87.9 % +/- 3.0%. An additional 3.2% phosphorus is present as surface oxides, titratable by
boiling the uncombusted mixture of red phosphorus with butyl rubber in water. Thus, surface oxides coat most mixture of red phosphorus with butyl
rubber pellets. Combustion studies showed the butyl rubber to amount to 5.2% of the formulation.
The pellet samples of mixtures of red phosphorus with butyl rubber pellets (size 0.6 cm x 0.6 cm, corresponding ca. 0.4 cm²) and powder (size 0.09 cm, corresponding to a surface of ca. 0.01cm²) were examine regarding the surface area measurements. As measured by a continuous volumetric method, the surface areas for powder and pellets were 0.2 m² /g and 0.15 m² /g +/- 20%, respectively. A repeat of analysis using a one-point BET method (Brunaller, Emmett, Teller surface area determination) resulted in a value of 0.1 m² /g for both samples, which is slightly lower that the volumetric result but within the uncertainty of the measurement. Scanning electron microscopy (SEM) showed the surfaces of the pellets and powder are similarly rough.
Remark: The report does not contain any additional information of the origin of the powder sample which might also be from the same company Aberdeen Proving Grounds
Constituent 1
Results and discussion
Any other information on results incl. tables
The pellets were found to be very hydroscopic, with weight gain rates of 0.23 mg/g*h at 87% relative humidity and 0.20 /g*h at 37% relative humidity. This is not unusual due to the known desiccating properties of P205(P4010), an expected oxidative tranformation product (hydrolysis yields orthophosphoric acid).
Oxidation of RP/BR as a function of time appears to be independent of relative humidity and follows zero-order kinetics over the first 600 hr. From these data, a oxidation rate of 0.08%/day and a lifetime of 3.5 years was calculated. At some point we might expect the oxidation to deviate from linearity and become limited by oxygen diffusion through the surface oxide layers. However, from the length of the projected lifetime the aoutors would expect that RP/BR surfaces would be renewed by natural precipitationApplicant's summary and conclusion
- Conclusions:
- The oxidation of red phosphorus in air is independent from th humidity with a rate of about 0.08%/day and a calculated liftime of 3.5 years.
- Executive summary:
The oxidation of red phosphorus in air is independent of the humidity with a rate of about 0.08%/day and a calculated liftime of 3.5 years.
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