Benzenesulfonic acid, 4-C20-24 (even numbered) sec-alkyl derivs.

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Type of information:

experimental study

Adequacy of study:

key study

Study period:

24/01/2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Conducted at a GLP accredited laboratory

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

GLP compliance:

yes

Type of method:

pycnometer method

Remarks:

Micromeritics AccuPyc 1330 Gas Pynometer

Type:

relative density

Density:

0.956

Temp.:

20 °C

Type:

density

Density:

0.955 other: g/mL

Temp.:

20 °C

Relative Density:

The relative density of the test substance was calculated as shown in the following equation.

RD= W3 -W1/W2 -W1

W1 = weight of pycnometer

W2 = weight of pycnometer filled with water at 20°C

W3 = weight of pycnometer filled with test substance at 20°C

For example, the tare weight of the pycnometer was determined to be 35.7477 g. The average weight of the pycnometer filled with freshly boiled reagent water at 20.0°C was 62.0626 g. The weight of the pycnometer filled with test substance at 20.0°C for Replicate 2 was 60.9125 g.

Substituting these values into the above equation gave the following:

=(60.9125 g 35.7477 g) / (62.0626 g 35.7477 g)

Density:

The density of the test substance was calculated using the following equation.

density (g/mL) = relative density D × WT

WT = density of water at 20°C (0.9982 g/mL)

For example, the relative density for replicate 2 was calculated to be 0.9563. Substituting this value into the above equation gave the following:

density (g/mL) = 0.9563× 0.9982 g/mL = 0.9546 g/mL

Conclusions:

Relative density and density values of the test substance were calculated from 3 successive weighings that were within approximately 8 mg. The density of the test substance was calculated for each replicate using the density of water at 20°C, which is 0.9982 g/mL. The average relative density and density of the test substance were determined to be 0.9564 ± 0.0002 and 0.9547 ± 0.0002 g/mL at 20°C, respectively.

Description of key information

The relative density of the test substance was determined to be 0.9564 according to OECD guideline 109.

Key value for chemical safety assessment

Relative density at 20C:

0.956

Additional information

The average relative density and density of the test substance were determined to be 0.9564 ± 0.0002 and 0.9547 ± 0.0002 g/mL at 20°C, respectively, using OECD guideline 109 (Data from Huntsman, 2013 study).