Registration Dossier

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: as mentioned below
Principles of method if other than guideline:
The pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode system.
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: Solid
Details on test material:
- Name of test material (as cited in study report): 4',5'-dibromo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one- Molecular formula: C20 H10 Br2 O5- Molecular weight: 490.102 g/mol- Smiles notation: C12(c3c(Oc4c1ccc(c4Br)O)c(c(O)cc3)Br)c1c(cccc1)C(O2)=O-InChl: 1S/C20H10Br2O5/c21-15-13(23)7-5-11-17(15)26-18-12(6-8-14(24)16(18)22)20(11)10-4-2-1-3-9(10)19(25)27-20/h1-8,23-24H- Substance type: Organic- Physical state: Solid- Purity: 98.3%

Results and discussion

pH value
pH value:
4.66
Temp.:
29 °C
Concentration:
1 other: %w/v

Applicant's summary and conclusion

Conclusions:
The mean pH of 1% w/v dispersion of the test item 4',5'-dibromo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one (CAS No. 596-03-2 )was 4.66 at 29°C.
Executive summary:

The pH determination of test item4',5'-dibromo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one(CAS No. 596-03-2 )was done following OECD guideline 122. Mean pH of 1% w/v dispersion was measured with the help of pH meter and it was observed to be 4.66 at 29 °C.