Registration Dossier
Registration Dossier
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EC number: 217-617-8 | CAS number: 1912-24-9
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- from 14 June 1993 to 13 October 1993
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 994
- Report date:
- 1994
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: EPA OPP guidelines 63-8
- Deviations:
- yes
- Remarks:
- the water solubility test was performed in distilled water only and at 20°C only
- Principles of method if other than guideline:
- The PKa value is so low (1.56) that the water solubility test was performed in distilled water only and not using buffers at 3 pH values (4, 7, 9) since the atrazine molecule would be in the same form at all these pH's and solubility would not be effected. In addition the preliminary work indicated a water solubility of 4.04x10^-2 g/l at 30°C and hence a solubility temperature dependence of less than 3% per °C compared to the 20°C result. Therefore the test was performed at 20°C only and not at two other temperatures at least 10°C above and 20°C below of the test temperature.
- GLP compliance:
- yes
- Type of method:
- flask method
Test material
- Reference substance name:
- Atrazine
- EC Number:
- 217-617-8
- EC Name:
- Atrazine
- Cas Number:
- 1912-24-9
- Molecular formula:
- C8H14ClN5
- IUPAC Name:
- 6-chloro-N2-ethyl-N4-(propan-2-yl)-1,3,5-triazine-2,4-diamine
- Details on test material:
- Atrazine (pure grades)
Batch number 744
Purity 99.5%
Expiry: Stable until at least January 2995
Storage 4°C
Appaerance: white powder
Constituent 1
Results and discussion
Water solubility
- Water solubility:
- 0.032 g/L
- Temp.:
- 20 °C
- pH:
- 8.07 - 8.46
- Details on results:
- The water solubility results (uncorrected for purity) rangs from 0.03115 to 0.03351 g/L and pH from 8.07 to 8.46.
The mean water solubility was determined as 0.03193 g/L (corrected for purity) with an associated standard deviation of 8.75 x 10^-4 g/L
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
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