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Diss Factsheets
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EC number: 233-054-0 | CAS number: 10026-04-7
- 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
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- 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
- Principles of method if other than guideline:
- The test apparatus consisted of a Carius tube (a 35 ml Pyrex@ glass tube with an adapter at the outlet with a glass to metal seal) fitted with a Swagelock three way valve. One end of the valve was connected via a stainless steel tube with a 1/16” capillary bore to a calibrated 0 to 30 PSI pressure transducer. The other end was connected to a vacuum pump through a cold trap filled with liquid nitrogen. The entire assembly was leak checked before the experiments. The system was calibrated with acetone and methanol. The Carius tube, under nitrogen flow, was filled with the silane sample and then connected to a pressure transducer and the vacuum pump as described above. The system was evacuated several times until a constant pressure reading was observed in the pressure transducer. The connection to the vacuum pump was disconnected and the Carius tube containing the sample was placed in a bath at 20°C.The constant pressure reading after an equilibration time (20 minutes) was noted as the vapour pressure of the sample at 20°C. The entire process was repeated until two pressure values that were very nearly the same.
- GLP compliance:
- no
- Type of method:
- other: Carius tube
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 291.9 hPa
- Conclusions:
- A vapour pressure value of 291.9 hPa at 20°C was determined for the substance in a reliable study conducted according to generally accepted scientific principles.
Reference
Test 1: 213.01 mm Hg (4.12 PSI)
Test 2: 224.9 mm Hg (4.35 PSI)
Mean: 218.96 mm Hg (4.24 PSI)
Description of key information
Vapour pressure [silicon tetrachloride]: 29200 Pa at 20°C
Vapour pressure [silicic acid]: negligible
Key value for chemical safety assessment
- Vapour pressure:
- 29 200 Pa
- at the temperature of:
- 20 °C
Additional information
A vapour pressure value of 29200 Pa at 20°C was determined for the submission substance using a relevant test method but not in compliance with a known quality system. The result is considered to be reliable and is selected as key study.
The key study is supported by vapour pressure value of approximately 32000 Pa (239 mmHg) at 25.1°C using an isoteniscope method (Jenkins 1954). In Bimsner 2000, vapour pressure values of 22000 Pa at 10°C, 34000 Pa at 20°C and 50000 Pa at 30°C were obtained for the substance using relevant test method. In other reliable data, vapour pressure values of approximately 31400 Pa at 20°C and 29000 Pa at 20°C were obtained for the submission substance.
In available secondary sources to which reliability could not be assigned, vapour pressure values of approximately 26000 Pa at 20°C, 25700 Pa at 20°C, 32000 Pa at 25-25.5°C, 41300 Pa at 108.39°C and 1728000 Pa at 185.25°C were reported for the substance.
All the available vapour pressure data are in agreement that the submission substance is a highly volatile substance.
In contact with water, silicon tetrachloride reacts very rapidly to form silicic acid hydrochloric acid.
Silicic acid is expected to have negligible vapour pressure.
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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