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Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 04 May 2011 and 11 May 2011.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report date:
2011

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7000 (pH)
Version / remarks:
The pH has been determined using a procedure based on OPPTS 830.7000, August 1996 of the (OPPTS) Guidelines and Method MT75.3 of the CIPAC Handbook for the Analysis of Technical and Formulated Pesticides.
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
with the exception that the study plan was not audited for GLP compliance.

Test material

Constituent 1
Reference substance name:
E0286P/040A
IUPAC Name:
E0286P/040A
Details on test material:
Sponsor's identification: E0286P/040A
Description : Amber coloured viscous liquid
Purity : Not supplied
Batch number: Not supplied
Label : E0286P/040A/04 Irritant
Date received: 11 February 2010
Expiry date : 20 July 2011
Storage conditions: Room temperature in the dark

Results and discussion

pH value
pH value:
4.22
Temp.:
25 °C
Concentration:
other: 1% Aqueous solution/dispersion

Any other information on results incl. tables

Results

The results for the neat test item are shown below.

Table 4.2

Sample

After 1 minute

After 1 minute 10 seconds

10 minutes

1

4.6

4.5

N/A*

pH of distilled water used: 6.30

The results for the 1% aqueous solutions/dispersions are shown below.

Sample 1

Table 4.3

Aliquot

1

2

3

4

5

6

7

8

9

10

pH

4.40

4.19

4.25

4.24

4.21

4.21

4.21

4.20

4.21

4.21

Overall pH (last six readings): 4.21 pH of distilled water used: 6.21

Sample 2

Table 4.4

Aliquot

1

2

3

4

5

6

7

8

9

10

pH

3.69

3.60

3.76

3.98

4.20

4.20

4.25

4.24

4.25

4.21

Overall pH (last six readings): 4.23 pH of distilled water used:    6.18


*See Discussion in overall remarks section Section.



Applicant's summary and conclusion

Conclusions:
Conclusion
The pH of the test item has been determined.
The results are as follows:

Table 4.5
pH (at 25°C)
Neat N/A*

1% Aqueous solution/dispersion 4.22
Executive summary:

E0286P/040A: DETERMINATION OF pH

SUMMARY

The pH of the test item has been determined using a procedure based on OPPTS 830.7000, August 1996 of the Office of Prevention, Pesticides and Toxic Substances (OPPTS) Guidelines and Method MT75.3 of the CIPAC Handbook for the Analysis of Technical and Formulated Pesticides. The results are as follows:


pH (at 25°C)

Neat

N/A*

1% Aqueous solution/dispersion

4.22

* Discussion

The ultimate pH of the neat test item was “under range”, i.e. outside of the experimental range for the pH meter. Therefore, no definitive pH result could be determined for that sample.

As the test item was known to be insoluble in water, it was considered that the finding for the neat sample was most likely caused by the test item interfering with the liquid junction of the pH probe rather than providing evidence of an extremely low pH.

Therefore, it was considered that pH testing of the neat test item was not applicable.

Constant stirring of the original dispersions was maintained for the 1% w/v samples. Constant stirring of each aliquot was maintained during pH measurements for the 1% w/v samples.

Constant stirring was required for the 1% w/v samples, as the test item could not be dispersed by shaking alone. Even using constant stirring, the samples consisted of globules of test item floating around in the bulk water.

The pH probe was rinsed with distilled water between measurements.

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