1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol

pH

Administrative data

Endpoint:

pH

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-01-06 – 2017-01-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental result performed using standard methods of analysis

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)

Principles of method if other than guideline:

The mean 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

Test material information

Constituent 1

Reference substance name:

2-ethoxybenzoic acid

EC Number:

205-130-3

EC Name:

2-ethoxybenzoic acid

Cas Number:

134-11-2

Molecular formula:

C9H10O3

IUPAC Name:

2-ethoxybenzoic acid

Test material form:

liquid

Details on test material:

- Name of test material: 2-ethoxybenzoic acid
- Molecular formula: C9H10O3
- Molecular weight: 166.175 g/mol
- Smiles notation: CCOc1ccccc1C(=O)O
- InChl: 1S/C9H10O3/c1-2-12-8-6-4-3-5-7(8)9(10)11/h3-6H,2H2,1H3,(H,10,11)
- Substance type: Organic
- Physical state: Liquid

Specific details on test material used for the study:

- Name of test material: 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
- Molecular formula: C24 H20 N4 O
- Molecular weight: 380.449 g/mol
- Smiles notation: c12c(\N=N\c3c(cc(\N=N\c4c(cccc4)C)cc3)C)c(ccc1cccc2)O
- InChl: 1S/C24H20N4O/c1-16-7-3-6-10-21(16)26-25-19-12-13-22(17(2)15-19)27-28-24-20-9-5-4-8-18(20)11-14-23(24)29/h3-15,29H,1-2H3/b26-25+,28-27+
- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value

Key result

pH value:

9.94

Temp.:

26 °C

Concentration:

1 other: %w/v

Remarks on result:

other: Basic

Any other information on results incl. tables

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 dispersion		26°C
mean pH (RESULT)		9.94
Inference	1. Acidic 2. Basic 3. Neutral	Basic

Applicant's summary and conclusion

Conclusions:

The pH of 1% w/v dispersion of the test item 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol (CAS No85-83-6) was 9.94 at26 °C.

Executive summary:

The pH determination of test item 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol (CAS No 85-83- 6) was done following OECD guideline 122. pH of 1% w/v dispersion was measured with the help of pH meter and it was observed to be 9.94at 26 °C.Based on the study the 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol (CAS No 85-83- 6) was considered to be basic in nature.