Sodium salts of [[(phosphonomethyl)imino]bis[ethane-2,1-diylnitrilobis(methylene)]]tetrakisphosphonic acid (5-7 Na:1)

Density

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

density, other

Remarks:

other: specific gravity

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Principles of method if other than guideline:

Not stated

Key result

Type:

other: specific gravity

Density:

1.42

Remarks on result:

other: The temperature at which this result was determined is not stated but it is consistent with expected properties at ambient temperature.

Conclusions:

A specific gravity value of 1.42 wa reported for DTPMP-H in a company's MSDS. The original reference was not available for review and no further information is available. The reliability of this result is not assignable.

Reference 2

Endpoint:

density, other

Type of information:

other: typical product specification data

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Principles of method if other than guideline:

No details are available on the guideline used to determine this result.

Type:

density

Density:

ca. 1.3 - ca. 1.4 g/cm³

Temp.:

20 °C

Remarks on result:

other: liquid form (brown clear liquid)

Type:

bulk density

Density:

0.5 g/cm³

Temp.:

20 °C

Remarks on result:

other: bulk density of solid form (described as yellowish powder)

Conclusions:

A density value of 1.3 to 1.4 g/cm³ at 20°C was reported for DTPMP-xNa. The result was reported in a company MSDS. The original reference was not available for review and no further information is available. The reliability of this result is not assignable.

Reference 3

Endpoint:

density, other

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Principles of method if other than guideline:

No information on method and guideline

Key result

Type:

other: specific gravity

Density:

1 370 - 1 410 kg/m³

Temp.:

20 °C

Conclusions:

A specific gravity value from 1370 to 1410 kg/m³ at 20°C was reported for DTPMP-7Na in a secondary source. The original reference was not available for review and no further information is available. The reliability of this result is not assignable.

Reference 4

Endpoint:

density, other

Type of information:

other: typical product specification data

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Qualifier:

no guideline followed

Principles of method if other than guideline:

The type of method is not reported.

GLP compliance:

no

Type of method:

other: type of method is not reported

Key result

Type:

density

Density:

>= 1.31 - <= 1.33 g/cm³

Temp.:

20 °C

Conclusions:

A density value 1.31 - 1.33 g/cm³ at 20°C was reported for DTPMP (5-7Na). The result was reported in a company MSDS. The original reference was not available for review and no further information is available. The reliability of this result is not assignable.

Description of key information

Density: The weight of evidence from company data is for specific gravity values in the range ca. 1.3 - 1.4 g/cm³ under ambient conditions for various commercial solutions.

Additional information

No relative density of solid values are available, but this does not constitute a data gap since no solid DTPMP (5-7Na) products are known. A number of specific gravity values of individual commercial products are known for the aqueous solution of sodium salts of DTPMP. While the individual sources are secondary literature, meaning that in most cases the reliabilities are not assignable, overall the weight of evidence is taken to be adequately reliable for the purpose of registration.

 

The following company data of non-assignable reliability are available:

 

1) Density values of ca. 1.3 - 1.4 g/cm³ at 20°C and bulk density of 0.5 g/cm³ at 20°C were reported for commercial forms of DTPMP (1-3Na) in the online product specification data for a major European producer.

 

2) A specific gravity of 1.42 g/cm³ at 20°C was reported for DTPMP-H in online product literature for a major European producer. The original reference was not available for review and no further information is available.

 

3) A typical specific gravity of 1370 to 1410 kg/m³ (1.37 - 1.41 g/cm³) at 20°C was reported for DTPMP-7Na in a company product data sheet for a major European importer. The original reference was not available for review and no further information is available.

 

4) A density of 1.31 -1.33 g/cm³ at 20°C was reported for DTPMP (5 -7Na) in a company product data sheet.

 

DTPMP-H is a member of the DTPMP category, which is comprised of the acid form and any simple salts of the same acid.

 

The category hypothesis is that all the members are various ionised forms of the same parent acid. This category covers various sodium, potassium and ammonium salts of diethylene triamine penta(methylene phosphonic acid). The different salts are prepared by neutralising the acid to a specific pH and accordingly the proportions of the constituents and their degree of ionisation are comparable between substances under similar conditions (in vivoand in the environment). All category members are based on the DTPMP structure. Data are available for the acid form and some salts of DTPMP.

 

The read-across is therefore based on the presence of common functional groups in both the acid and the salt. The available density results are consistent for the aqueous solution of DTPMP acid and salts.