Registration Dossier
Registration Dossier
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EC number: 217-617-8 | CAS number: 1912-24-9
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- from 14 June 1993 to 13 October 1994
- 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 guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 112 (Dissociation Constants in Water)
- Deviations:
- not specified
- GLP compliance:
- yes
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
- Dissociating properties:
- yes
Dissociation constant
- No.:
- #1
- pKa:
- 1.56
- Temp.:
- 20 °C
- Remarks on result:
- other: Overall mean of three tests (see remarks on results).The associated standard deviation was 0.11
Any other information on results incl. tables
The first test, seven pKa values were obtained between 1 .60 and 1 .76 with a mean of 1 .67 and an associated standard deviation of 0.065, For the second test, seven pKa values were obtained between 1.46 and 1 .65 with a mean of 1 .57 and an associated standard deviation of 0.074. For the third test, seven pKa values were obtained between 1.33 and 1.54 with a mean of 1.45 and an associated standard deviation of 0.070.
Applicant's summary and conclusion
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