2-naphthol

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04.01.2018 - 04.01.2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

no

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.252 g/cm³

Temp.:

20 °C

Results:  Relative Density

Two tests with different amounts of the test item were performed to determine the relative density D₄²⁰at a temperature of 20 °C ± 0.01 °C. Table1 compiles the results.

Table 1:    Results of the measurement of the density of the test item

Test No.	Temperature [°C]	Amount of test item [g]	Average sample volume [cm³]	Density [g/cm³]*
1	20	8.83	7.04486	1.25340
2	20	8.82	7.05558	1.25007

* The pressurizing-expansion cycles are performed until 5 subsequent volume measurements have a relative standard deviation (RSD) of = 0.2 %.

The mean density of the test item at 20 °C is 1.251735 g/cm³. The relative density D₄²⁰ is calculated by dividing the density of the test item by the density of water at 4 °C (0.9999750 g/cm³).

The relative density is     D₄²⁰=1.252.

Conclusions:

The relative density of 2-naphthol is 1.252.

Executive summary:

According to OECD Test Guidelines 109 (2012) and Regulation EC No. 440/2008 Method A.3., the relative density D₄²⁰of the test item 2-Naphthol at 20 °C ± 0.01 °C (compared to water at 4 °C) is D₄²⁰ = 1.252.

Description of key information

A study was performed with a pycnometer device to determine the relative density of the test item 2-naphthol.  The test was conducted in compliance with OECD Test Guideline 109.  It concluded that 2-naphthol has a density of 1.252 g/cm³ at 20 ^oC.

Key value for chemical safety assessment

Relative density at 20C:

1.252