Potassium; 2-[bis[2-[bis(carboxylatomethyl)amino]ethyl]amino]acetate; iron(3+)

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February - Apirl 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

GLP compliance:

yes (incl. QA statement)

Remarks:

certificate no.: 17/2017/DPL

Type of method:

other: as the substance decompose before melting point, the experiment for boilng ponint wasn't conducted

Key result

Decomposition:

yes

Remarks:

decomposes below melting and boling point

Decomp. temp.:

218.7 °C

Conclusions:

DTPA-FeK (FeDTPA K) decomposes below melting and boiling point under atmospheric pressure of 1000.7 hPa at 218.7 ± 2.1 °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 OECD Guideline 103, determination of the melting point and boiling point of DTPA-FeK (FeDTPA K) was carried out. The preliminary study and measurements were performed under atmospheric pressure of 1000.7 hPa. The study was carried out in order to determine the melting temperature range for DTPA-FeK (FeDTPA K) (50.0 – 400.0°C).

The three series of boiling point measurements (final test) were performed in the temperature range 217.0 - 400.0 °C. The heating rate was 0.5 °C/min. For all three samples thethermal decomposition was observed.The average value of initial  decomposition temperature for the three samples  of DTPA-FeK (FeDTPA K) is 218,7 ± 2,1 °C.

According toGuidance on Information Requirements and Chemical Safety Assessment Chapter R.7a: Endpoint specific guidance(July 2017)“The study does not need to be conducted for substances which decompose before boiling”.Therefore the study of boiling point was not performed.

Description of key information

DTPA-FeK (FeDTPA K) decomposes below melting and boiling point under atmospheric pressure of 1000.7 hPa at 218.7 ± 2.1 °C (the average value). (Methods: EEC A.1 and OECD No. 102; EEC A.2 and OECD No. 103)

The average value of initial  decomposition temperature for the three samples  of DTPA-FeK (FeDTPA K) is 218,7 ± 2,1 °C.

According to Guidance on Information Requirements and Chemical Safety Assessment Chapter R.7a: Endpoint specific guidance (July 2017)“The study does not need to be conducted for substances which decompose before boiling”.Therefore the study of boiling point was not performed.