1-phenylazo-2-naphthol

Flash point

Link to relevant study record(s)

Reference

Endpoint:

flash point, other

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:

comparable to guideline study

Justification for type of information:

Data is from study report

Principles of method if other than guideline:

The flash point of a flammable liquid is the lowest temperature at which there will be enough flammable vapor to ignite when an ignition source is applied.

GLP compliance:

not specified

Type of method:

closed cup

Flash point apparatus:

Pensky-Martens apparatus

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

Flash point:

> 290 °C

Atm. press.:

977.3 hPa

Method Details		Observations	Remarks if, any
Method	Closed cup method using Pensky- Martens Flash Point Apparatus
Principle of Flash point test	The flash point of a flammable liquid is the lowest temperature at which there will be enough flammable vapor to ignite when an ignition source is applied.
Type of method	Closed cup
Flash point apparatus	Abel's flash point apparatus Pensky-Martens flash point apparatus.	Pensky-Martens flash point apparatus.
Quantity of chemical used	g/ml	5.002g
Ignition source	Gas lighter/flame	Gas lighter
Atmospheric pressure	hPa	977.3hPa
Flash point (RESULT)	°C	>290°C

Interpretation of results:

other: non-flammable

Conclusions:

The mean flash point of 1-phenylazo-2-naphthol(CAS No. 842-07-9) is greater than 290°C at 977.3hPa.

Executive summary:

The flash point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and .the test item burns completely at 290°Cwith brown fumes and pungent smell.But no flash was observed till 290°C,inferring the mean flash point of the test item to be greater than 290°C at 977.3 hPa.

Description of key information

The flash point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and .the test item burns completely at 290°Cwith brown fumes and pungent smell.But no flash was observed till 290°C,inferring the mean flash point of the test item to be greater than 290°C at 977.3 hPa.

Key value for chemical safety assessment

Flash point at 101 325 Pa:

290 °C

Additional information

The flash point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and .the test item burns completely at 290°C with brown fumes and pungent smell. But no flash was observed till 290°C,inferring the mean flash point of the test item to be greater than 290°C at 977.3 hPa.

As per the available data for flash point from laboratory, the flash point value determined was >290 degree C. As the data from laboratory has K1 reliability thus considered as key study for the chemical safety assessment. Also based on criteria mentioned in CLP regulation the chemical has flash point >than 60 degree C hence the substance 1-phenylazo-2-naphthol (CAS No. 842-07-9) was considered to be non-flammable.