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EC number: 909-129-5 | CAS number: -
- 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
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- April 28, 2010 to November 30, 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- Reaction mass of m,alpha-dimethylstyrene and p,alpha-dimethylstyrene
- EC Number:
- 909-129-5
- Molecular formula:
- C10H12
- IUPAC Name:
- Reaction mass of m,alpha-dimethylstyrene and p,alpha-dimethylstyrene
- Details on test material:
- Manufacturer: Mitsui Chemicals, Inc.
Storage conditions: refrigeration (≤ 10°C)
Constituent 1
- Specific details on test material used for the study:
- Chemical name: isopropenyltoluene
Abbreviated name: IPT
Lot No.: none (in-process product)
Purity: 98.82% (m-isomer, 74.25%; p-isomer, 24.57 %)
Manufacturer: Mitsui Chemicals, Inc.
Results and discussion
Vapour pressure
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- 79.2 Pa
Transition / decomposition
- Remarks on result:
- other: No information on transition/decomposition was provided in the report
Any other information on results incl. tables
The results of individual measurements are shown in Table l.
Table 1: Evaporation rate
Measurement |
Temperature (°C) |
Initial weight (mg) |
Weight (mg) after 60 min |
Evaporation rate Vt1 (mg h-1) |
Measurement 1 |
25 |
45.51 |
43.50 |
2.01 |
Measurement 2 |
25 |
47.74 |
45.67 |
2.07 |
Measurement 3 |
25 |
45.89 |
43.66 |
2.23 |
The evaporation rate at 25°C, Vtl (mg*h-1) was converted to the molar evaporation rate per cm2 at 25°C using the following equation:
Vt2 (mol cm-2 h-1= Vtl/1000/0.196*/molecular weight
* Upper surface area of the cell: 0.196 cm2
The following relationship is known between vapour pressure and molar evaporation rate per cm2 at t°C:
Log Pt = At + (Bt x log Vt2), where At and Bt are temperature-specific constants at the carrier gas flow rate set for the apparatus used. The constants at 25°C are shown in Table 2.
Table 2: Constant for the calculation of vapour pressure
|
Constant |
Constant |
Temperature (°C) |
At |
Bt |
25 |
4.8926 |
1.2514 |
Results obtained in triplicate are 0.561 torr, 0.582 torr, 0.639 torr. The vapour pressure P25°C (torr) obtained was converted to the vapour pressure P25°C (Pa) using the following Equation:
P25°C (Pa) = P25°C (torr) x 133.3
The calculated vapour pressure P25°C (Pa) in each measurement is shown in Table 3.
Table 3: Vapour pressure of IPT
Measurement |
Temperature (°C) |
Vapour pressure (Pa) |
Mean vapour pressure (Pa) |
CV (%) |
Measurement 1 |
25 |
74.8 |
79.2 |
6.8 |
Measurement 2 |
25 |
77.6 |
|
|
Measurement 3 |
25 |
85.2 |
|
|
The coefficient of variation (CV%) for values obtained in triplicate was 6.8%. According to Table 1 in the OECD test guideline 104, the estimated reproducibility of "the effusion method: isothermal thermogravimetry" is up to 50%. The reproducibility found was considered to be within the acceptable range because the coefficient of variation at 25°C was less than 50%.
Applicant's summary and conclusion
- Conclusions:
- Vapour pressure of isopropenyltoluene: 79.2 Pa (25°C)
- Executive summary:
The vapour pressure of isopropenyltoluene (98.82% pure) was determined according to OECD 104 using the Effusion method: isothermal thermogravimetry at 25°C in triplicate using a thermogravimetric analyzer TGA-50 (Shimadzu Corporation). A sample was introduced into a platinum cell, the cell was then introduced into the thermogravimetric analyzer. The temperature was set at 25°C, and monitoring of the sample weight was started after confirming that steady state had been established. Sample weight was read at the beginning of the monitoring and 60 min later, and the evaporation rate Vt1 (mg*h-1) was determined. The triplicate measurements gave values for vapour pressure at 25°C of 74.8, 77.6 and 85.2 Pa, mean 79.2 Pa with CV 6.8%. It is concluded that the vapour pressure of isopropenyltoluene (98.82% pure) at 25°C is 79.2 Pa.
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