1-phenylazo-2-naphthol

pH

Administrative data

Endpoint:

pH

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-01-09 – 2017-01-09

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Data is from study report

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:

1-phenylazo-2-naphthol

EC Number:

212-668-2

EC Name:

1-phenylazo-2-naphthol

Cas Number:

842-07-9

Molecular formula:

C16H12N2O

IUPAC Name:

1-[(E)-2-phenyldiazen-1-yl]naphthalen-2-ol

Test material form:

solid

Details on test material:

- Name of test material (as cited in study report): C. I. Solvent Yellow 14
- Molecular formula (if other than submission substance): C16H12N2O
- Molecular weight (if other than submission substance): 248.284 g/mole
- Substance type: Organic

Specific details on test material used for the study:

- Name of test material: 1-(phenyldiazenyl)-2-naphthol
- Molecular formula: C16 H12 N2 O
- Molecular weight: 248.284 g/mol
- Smiles notation: c12c(\N=N\c3ccccc3)c(ccc1cccc2)O
- InChl: 1S/C16H12N2O/c19-15-11-10-12-6-4-5-9-14(12)16(15)18-17-13-7-2-1-3-8-13/h1-11,19H/b18-17+
- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value

Key result

pH value:

10.2

Temp.:

26 °C

Concentration:

1 other: % w/v

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)		10.20
Inference	1. Acidic 2. Basic 3. Neutral	Basic

Applicant's summary and conclusion

Conclusions:

The pH determination of test item 1-phenylazo-2-naphthol (CAS No 842-07-9) 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 10.20at 26 °C.

Executive summary:

The pH determination of test item 1-phenylazo-2-naphthol (CAS No 842-07-9) 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 10.20 at 26 °C. Based on the study the 1-phenylazo-2-naphthol (CAS No 842-07-9) was considered to be basic in nature.