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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04/05/2016 - 04/05/2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard test guidelines

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: OECD 122
Principles of method if other than guideline:
The pH determination of test item 3,4,5,6-tetrachloro-2-(1,4,5,8-tetrabromo-6-hydroxy-3-oxoxanthen-9-yl)benzoic acid was done as per the test guideline OECD 122. The mean pH of the test dispersionwas determined with the help of digital pH meter.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
3,4,5,6-tetrachloro-2-(1,4,5,8-tetrabromo-6-hydroxy-3-oxoxanthen-9-yl)benzoic acid
EC Number:
242-355-6
EC Name:
3,4,5,6-tetrachloro-2-(1,4,5,8-tetrabromo-6-hydroxy-3-oxoxanthen-9-yl)benzoic acid
Cas Number:
18472-87-2
Molecular formula:
C20H4Br4Cl4O5.2Na
IUPAC Name:
Sodium 2,3,4,5-tetrachloro-6-(2,4,5,7-tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate
Test material form:
solid: particulate/powder
Details on test material:
IUPAC name: 3,4,5,6-Tetrachloro-2-(1,4,5,8-tetrabromo-6-hydroxy-3-oxoxanthen-9-yl)benzoic acid
Molecular weight: 829.6388
Molecular formula: C20-H2-Br4-Cl4-O5.2Na
Smiles: [Na+].[Na+].[O-]c1c(Br)cc2c(Oc3c(Br)c([O-])c(Br)cc3C24OC(=O)c5c(Cl)c(Cl)c(Cl)c(Cl)c45)c1Br
Inchl: InChI=1S/C20H4Br4Cl4O5.2Na/c21-5-1-3-17(9(23)15(5)29)32-18-4(2-6(22)16(30)10(18)24)20(3)8-7(19(31)33-20)11(25)13(27)14(28)12(8)26;;/h1-2,29-30H;;/q;2*+1/p-2

Results and discussion

pH value
pH value:
8.24
Temp.:
24 °C
Concentration:
1 other: % w/v
Remarks on result:
other: Basic

Any other information on results incl. tables

TEST RESULTS

Method Details

Observations

Remarks if, any

Guideline

OECD 122

 

 

Method

 

Digital pH meter

 

Principle of method

The pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode system.

 

Temperature of 1% w/v test solution

-

24 °C

pH (RESULT)

 

-

8.24

Inference

1.   Acidic

2.   Basic

3.   Neutral

 

 

Basic

 

Applicant's summary and conclusion

Conclusions:
The pH determination of test item was done following OECD guideline 122. pH of 1% w/v solution was measured with the help of pH meter and it was observed to be 8.24 at 24 °C.
Executive summary:

The pH determination of test item  was done as per the test guideline OECD 122. The pH of the test solution was determined with the help of digital pH meter. The pH was determined to be 8.24 at 24 °C.

This value indicates that the substance  is basic in nature.