Trisodium [N,N-bis[2-[bis(carboxymethyl)amino]ethyl]glycinato(5-)]manganate(3-)

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes (incl. QA statement)

Remarks:

registration no.: 17/2017/DPL

Type of method:

capillary method

Key result

Atm. press.:

999.7 hPa

Decomposition:

yes

Remarks:

decompose below melting and boilng point

Decomp. temp.:

294.25 °C

The observed values of the initial decomposition temperature of DTPA-MnNa3(MnDTPA)

Sample	Atmospheric pressure, hPa	The initial decomposition temperature, °C
1	999.7	294.5
2		294.0
3		293.5
Average values ± standard deviations, °C		294.25 ± 0.76

Conclusions:

The DTPA-MnNa3 (MnDTPA) decomposes below melting and boiling point under atmospheric pressure of 999.7 hPa at 294.25 ± 0.76 °C (the average value). (Methods: EEC
A.1 and OECD No. 102; EEC A.2 and OECD No. 103).

Executive summary:

In accordance with the oOECD Guideline 102, determination of the melting point of DTPA-MnNa3(MnDTPA) was carried out.

The capillary tube in heated metal block method and BÜCHI Melting Point B-565 apparatus was used. For melting point determination a substance sample was finely ground, placed in a capillary tube and packed tightly. The measurements were performed in three parallel tubes. Observations of the tested material properties changes were recorded in the temperature range investigated.

The preliminary study and measurements were performed under atmospheric pressure of 999.7 hPa. The study was carried out in order to determine the melting temperature range for DTPA-MnNa3(MnDTPA) (50.0 – 400.0°C).

In final test the three series of boiling point measurements were performed in the temperature range 290.0 - 400.0 °C. The heating rate was 0.5°C/min. In all samples was observed   change the tint from beige to brown and characteristic smell indicating the thermal decomposition of the sample. The average value of initial  decomposition temperature for the three samples  of DTPA-MnNa3 (MnDTPA) is 294.25 ± 0.76 °C.

The DTPA-MnNa3(MnDTPA) decomposes below melting and boiling point under atmospheric pressure of 999.7 hPa at 294.25 ± 0.76 °C (the average value). (Methods: EEC A.1  and OECD No. 102; EEC A.2 and OECD No.103).

Description of key information

The DTPA-MnNa3 (MnDTPA) decomposes below melting and boiling point under atmospheric pressure of 999.7 hPa at 294.25 ± 0.76 °C (the average value). (Methods: EEC A.1 and OECD No. 102; EEC A.2 and OECD No. 103).