Registration Dossier

Physical & Chemical properties

pH

Currently viewing:

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Justification for type of information:
Experimental test result performed using standard test guidelines

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
Principles of method if other than guideline:
The pH of Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1Hpyrazole-3-carboxylic acid complex (CAS No. 12225-21-7) was determined as per test guideline OECD 122. The mean pH of the test dispersionwas determined with the help of digital pH meter.
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Name of test material: Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex- IUPAC name: aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)- Molecular formula: C48H33AlN12O27S6- Molecular weight: 1429.19 g/mole- Smiles : C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].[Al+3]- Inchl: 1S/3C16H12N4O9S2.Al/c3*21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h3*1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/q;;;+3/p-3- Substance type: Organic- Physical state: Solid Red powder
Specific details on test material used for the study:
- Name of test material: Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex- IUPAC name: aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)- Molecular formula: C48H33AlN12O27S6- Molecular weight: 1429.19 g/mole- Smiles : C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].[Al+3]- Inchl: 1S/3C16H12N4O9S2.Al/c3*21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h3*1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/q;;;+3/p-3- Substance type: Organic- Physical state: Solid Red powder

Reagents

Reagent:
water

Results and discussion

pH value
Key result
pH value:
3.98
Temp.:
30 °C
Remarks on result:
other: pH of 1% w/v dispersion of the test item

Any other information on results incl. tables

TEST DESCRIPTION AND RESULT

Method Details

Observations

Remarks if, any

Guideline

OECD 122

 

 

Method

Digital pH meter

 

Principle of Method

The mean 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 emulsion

 

30°C

mean pH (RESULT)

 

3.98

Inference

 

1. Acidic

2. Basic

3. Neutral

 

Acidic

Applicant's summary and conclusion

Conclusions:
The pH of 1% w/v dispersion of the test item Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex (CAS No12225-21-7) was 3.98 at 30 °C.
Executive summary:

The pH determination of test item Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1Hpyrazole-3-carboxylic acid complex (CAS No. 12225-21-7 ) was done as per the test guideline OECD 122.

The mean pH of 1% w/v dispersion of the test item was determined with the help of digital pH meter. The mean pH was determined to be 3.98 at 30 °C.