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EC number: 800-309-8 | CAS number: 231297-75-9
- 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
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- Flash point
- Auto flammability
- Flammability
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- Oxidation reduction potential
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- Stability: thermal, sunlight, metals
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- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
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- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
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- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
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- Nanomaterial radical formation potential
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- Endpoint summary
- Stability
- Biodegradation
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- 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
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- Toxicological Summary
- Toxicokinetics, metabolism and distribution
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- Specific investigations
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- 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
- Study period:
- 2012-11-30 - 2012-12-05
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The Department of Health of the Government of The United Kingdom
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 25 °C
- Vapour pressure:
- 0.01 Pa
- Temp.:
- 99 °C
- Vapour pressure:
- 0.457 Pa
- Conclusions:
- The study report describes a valid guideline study conducted under certificated GLP compliance. The vapour pressure was determined as 0.01 Pa at 25 °C and 0.457 Pa at 99 °C.
- Executive summary:
The vapour pressure of magnesium sulfonate target substance (CAS 231297-75-9) was determined using the effusion method (vapour pressure balance) according to OECD Guideline 104 / EU Method A.4 (Tremain, 2012). The Temperature was controlled electronically. Using the cross-section, a diagram ws drawn and the system was evacuated. Afterwards the shutter was opened above the sample oven, which directed the escaping vapour jet towards the scale pan. The difference in mass reading the orifice covered and uncovered is proportional to the vapor pressure at the given oven temperature. A preliminary run was undertaken over the temperature range 20 °C to 114 °C in order to provide information for a suitable temperature range for the main test. A final sequence of ten runs was started after a sample of test substance had been under vacuum for approximately 69 1/4 hours. Temperature and pressure readings were taken between 90 and 100 °C with a one hour dwell at 90 °C between runs. As result, the vapour pressure at 25 °C was determined as 0.01 Pa and at 99 °C the value is given as 0.457 Pa, respectively.
Reference
The test substance did not change in appearance under the conditions used in the determination.
Table 1. Vapour pressure data at 25 °C
Run |
Log10[Vp (25 ºC)] |
2 |
-2.07 |
3 |
-1.85 |
4 |
-1.86 |
5 |
-1.96 |
6 |
-1.89 |
7 |
-2.07 |
8 |
-2.01 |
9 |
-2.06 |
10 |
-2.10 |
Mean |
-1.99 |
Vapor Pressure |
1.03 x 10-2Pa |
Table 2. Vapour pressure at 99 °C
Run |
Log10[Vp(99 ºC)] |
2 |
-0.154 |
3 |
-0.244 |
4 |
-0.287 |
5 |
-0.324 |
6 |
-0.365 |
7 |
-0.381 |
8 |
-0.419 |
9 |
-0.436 |
10 |
-0.454 |
Mean |
-0.340 |
Vapor Pressure |
0.457 Pa |
Description of key information
OECD 104 / EU Method A.4_vapour pressure balance_effusion method_vapour pressure: 0.01 Pa at 25 °C; 0.457 Pa at 99 °C
Key value for chemical safety assessment
- Vapour pressure:
- 0.01 Pa
- at the temperature of:
- 25 °C
Additional information
The key value was determined using the vapour pressure balance (effusion method) in accordance to OECD Guideline 104/EU Method A.4 (Tremain, 2013).
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