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EC number: 205-771-9 | CAS number: 150-78-7
- 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- from 19 jun 2006 to 09 jul 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The study was conducted according to standardised guidelines and GLP.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Water solubility:
- 785 mg/L
- Temp.:
- 20 °C
- pH:
- 4.6 - 4.9
- Conclusions:
- Interpretation of results (migrated information): moderately soluble (100-1000 mg/L)
Moderately soluble. - Executive summary:
The determination of the water solubility of Paradimethoxybenzene was performed using the flask shaking method. The concentrations were determined by HPLC measurement after a shaking time of 24 hours, 48 hours and 72 hours, respectively, at 30°C. Afterwards the samples were equilibrated for another 24 hours at 20.0°C. A slight increase in concentration was observed at longer equilibration times. As the measured results differed by less than 15%, the study is considered to be valid. The water solubility of PDMB was calculated as mean value from the results obtained at 48 hours and 72 hours of shaking.
In conclusion, the water solubility of Paradimethoxybenzene at 20°C was determined to be 785 mg/l (standard deviation ± 63 mg/l).
The water solubility was not corrected for the purity of the test item (as given under item 2.1).
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 20 may 2008
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted according to OECD guideline, but not GLP
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- flask method
- Water solubility:
- 708 mg/L
- Temp.:
- 20 °C
- pH:
- 6.8
- Details on results:
- After 24H equilibration time at 20°C, the substance concentration was found to be 703 mg/L, after 48H, it reached 708 and 712 mg/l at 72H. Since the three samples did not vary by more than 15%, the saturation was estimated to be reached. Mean water solubility = 708 mg/l.
- Conclusions:
- Interpretation of results (migrated information): moderately soluble (100-1000 mg/L)
Moderately soluble. - Executive summary:
The water solubility of the test substance Paradimethoxybenzene was determined according to the OECD guideline 105.
In this study (Clariant, 2008), the flask method was used.
The concentrations were determined by UV/VIS measurement after a preincubation time of 5 hours at 30°C and an equilibration time of 24 hours, 48 hours and 72 hours, respectively, at 20°C, with constant stirring.
The water solubility of Paradimethoxybenzene at 20°C and pH 6,8 was determined to be 708 mg/L.
Referenceopen allclose all
The saturation concentration of Paradimethoxybenzene at room temperature was estimated by a simplified flask method in the preliminary test to be about 1 g/l. Therefore, the flask shaking test was performed.
The concentrations were determined after a shaking time of 24 hours, 48 hours and 72 hours, respectively, at30°C. Afterwards the samples were equilibrated for another 24 hours at 20.0°C. As the measured results differed by less than 15 %, the study is considered to be valid. The water solubility of PDMB was calculated as mean value from the results obtained after 48 hours and 72 hours of shaking. The results of the individual measurements of the main test are summarised in Table 1. The tabulated values represent rounded results, which were obtained by calculation using the exact raw data.
Table 1: Results of the water solubility of Paradimethoxybenzene
Sample No. |
Shakingtime at30°C |
Concentration analysed |
Concentration calculated |
Water solubility calculated (rounded) |
|
|
[mg/l] |
[mg/l] |
[mg/l] |
1 |
72 |
33.677 |
841.91 |
|
2 |
33.488 |
837.20 |
|
|
3 |
48 |
29.183 |
729.58 |
785.46 |
4 |
29.326 |
733.14 |
SD = 62.51 |
|
5 |
24 |
26.593 |
664.83 |
|
6 |
24.906 |
622.65 |
|
The saturation mass concentration is calculated from the bold values
SD = standard deviationDescription of key information
The experimental data (RCC 2007 and Clariant 2008, according to OECD 105, GLP) were chosen as key studies.
RCC study value: 785 mg/L at 20°C
Clariant study value: 708 mg/L at 20°C
Key value for chemical safety assessment
- Water solubility:
- 785 mg/L
- at the temperature of:
- 20 °C
Additional information
Other available data, from Handbook or supplier, were selected as supporting studies and they were in the range from 800 mg/L at 20°C to 1543 mg/L at 25°C and were of reliability 2.
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