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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
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:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate
EC Number:
240-474-8
EC Name:
Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate
Cas Number:
16423-68-0
Molecular formula:
C20H8I4O5.2Na
IUPAC Name:
disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate
Test material form:
solid: particulate/powder
Details on test material:
- Name of test material: disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate
- Molecular formula: C20 H8 I4 O5 Na2
- Molecular weight: 881.88 g/mole
- Substance type: Organic
- Smiles: [Na+].[Na+].[O-]c1c(I)cc2c(Oc3c(I)c([O-])c(I)cc3C24OC(=O)c5ccccc45)c1I
- InChl: InChI=1S/C20H8I4O5.2Na/c21-11-5-9-17(13(23)15(11)25)28-18-10(6-12(22)16(26)14(18)24)20(9)8-4-2-1-3-7(8)19(27)29-20;;/h1-6,25-26H;;/q;2*+1/p-2
- State: Solid powder

Results and discussion

pH value
Key result
pH value:
6.4
Temp.:
30.3 °C
Concentration:
1 vol%
Remarks on result:
other: No other detail available

Any other information on results incl. tables

Observation Table & Result :

Method Details

Observations

Remarks if, any

Guideline

OECD 122

 

 

Method

 

pH Meter

 

Principle of method

 

 

 

 

 

 

 

A pH meter is essentially a voltmeter with high input impedance which measures the voltage of an electrode sensitive to the hydrogen ion concentration, relative to another electrode which exhibits a constant voltage.

 

Temperature of 1% w/v test solution

-

30.3°C

pH (RESULT)

 

-

6.4

Inference

1.   Acidic

2.   Basic

3.   Neutral

 

Acidic

Applicant's summary and conclusion

Conclusions:
The pH determination of test chemical was done as per the test guideline OECD 122. The mean pH of the test dispersion was determined with the help of digital pH meter. pH of 1% w/v aqueous solution of the test chemical was 6.4 at 30.3°C, which indicates that the test chemical was acidic in nature.
Executive summary:

The pH determination of test chemical was done as per the test guideline OECD 122. The mean pH of the test dispersion was determined with the help of digital pH meter. pH of 1% w/v aqueous solution of the test chemical was 6.4 at 30.3°C, which indicates that the test chemical was acidic in nature.