Registration Dossier
Registration Dossier
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EC number: 406-250-0 | CAS number: 72619-32-0 HALOXYFOP R-(+)-ME HERBICIDAL CHEMICAL
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7000 (pH)
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- Methyl (R)-2-(4-(3-chloro-5-trifluoromethyl-2-pyridyloxy)phenoxy)propionate
- EC Number:
- 406-250-0
- EC Name:
- Methyl (R)-2-(4-(3-chloro-5-trifluoromethyl-2-pyridyloxy)phenoxy)propionate
- Cas Number:
- 72619-32-0
- Molecular formula:
- C16H13ClF3NO4
- IUPAC Name:
- methyl 2-(4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxy}phenoxy)propanoate
- Test material form:
- solid
Constituent 1
- Specific details on test material used for the study:
- Haloxyfop (R) methyl ester
Lot #: OC30150101 (TSN102229)
Purity: 96.7% R + 1.09% S
Reagents
- Reagent:
- water
Results and discussion
pH value
- Key result
- pH value:
- 5.74
- Temp.:
- 24.2 °C
- Concentration:
- 1.02 other: % w/w
Applicant's summary and conclusion
- Conclusions:
- The pH of an approximately 1.00% wt/wt aqueous solution was 5.74 at 24.2 °C
- Executive summary:
The pH was determined and documented for the test substance. The determination of this physical and chemical property is in compliance with the U.S. EPA OPPTS Test Guideline OPPTS 830.7000.
The pH meter and electrode were calibrated by using pH 4, pH 7, and pH 10 standard buffers. A 1.02% solution of the test substance was prepared by adding 0.5091 g of test substance to 49.5174 g of water and stirring in a beaker.
After the stirring was stopped, the pH electrode was immersed in the solution, and the pH and temperature of the solution were recorded. After stirring for an additional two to three minutes, an additional reading was recorded. An average of the two readings was then calculated. A replicate pH determination was performed by preparing a second 1.01% solution of the test substance: 0.5052 g of test substance was mixed with 49.5251 g of water and the pH of the second solution was determined in the same manner as for the first sample aliquot. The pH of the test substance was reported as an average of the replicate samples.
The pH of an approximately 1.00% wt/wt aqueous solution was 5.74 at 24.2 °C.
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