Methylphosphonic acid

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012-11-27 to 2012-11-29

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Principles of method if other than guideline:

The density ρ of a substance is defined as the quotient of its mass and its volume and is expressed in SI units kg/m³ or g/cm³ by a defined temperature. The density ρ is calculated from the difference in weight between the full and empty pycnometer and its volume.

GLP compliance:

no

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.495

Temp.:

20 °C

Individual results

Sample preparation: The test item was dried at 105 °C. The density was determined by the dry residue.

mo(g): mass of pycnometer empty

m1(g): mass of pycnometer with n-heptane

m2(g): mass of pycnometer with sample

m3(g): mass of pycnometer with sample filled up with n-heptane

	Measurement 1	Measurement 2	Measurement 3	Measurement 4
mo:	20.3556	20.3575	20.2440	20.2439
m1:	37.3152	37.4545	37.2871	37.2921
m2:	20.6596	20.7360	20.6598	20.5659
m3:	37.4810	37.6609	37.5141	37.4676

ρ 20 °C (n-heptane): 0.6795 g/cm³

ρ 20 °C (sample): 1.4947 g/cm³                     1.4944 g/cm³                            1.4963 g/cm³                     1.4938 g/cm³

mean ρ 20 °C (sample): 1.4948 g/cm³ (+/- 0.001)

Conclusions:

The relative density of methylphosphonic acid was determined to be 1.4948 g/cm³.

Executive summary:

The density of methylphosphonic acid was evaluated in a study conducted according to OECD Guideline 109. Pycnometer was used for this purpose. Based on the findings of the study, the relative density for the test substance was determined to be 1.4948 g/cm³.

Description of key information

The density of methyl phosphonic acid was evaluated in a study conducted according to OECD Guideline 109. A Pycnometer was used for this purpose. Based on the findings of the study, the relative density for the test substance was determined to be 1.4948 g/cm³.

Key value for chemical safety assessment

Relative density at 20C:

1.495