Orthoboric acid, compound with 2,2',2''-nitrilotriethanol

Boiling point

Administrative data

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 Sep 2017 - 15 Nov 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Decomposition:

yes

Remarks on result:

other: Glass transition point: -72.6°C. No melting/freezing point between 25°C and -90°C. Reaction and/or decomposition of the test item occurred during the DSC experiments. Decomp. temp was not determined.

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 125°C. 25% weight loss at 188°C and 70% at 399°C.

After the experiment, a dark brown molten residue remained in the sample container (original colour: amber). The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

During cooling a glass transition was observed between-50°C and -80°C.  During heating a glass transition was observed between -50°C and -90°C (inflection point :-72.838°C). 

A broad endothermic effect was observed between 50°C and 150°C. This effect might have been due to evaporation of a component of the test item or to reaction and/or decomposition of the test item. 

From 150°C on, an exothermic effect was observed. After the experiment, an off-white molten residue remained in the sample container.  The change of the colour supported reaction and/or decomposition of the test item. 

DSC EXPERIMENT 2

Similar results as in Experiment 1 were obtained. The inflection point of the glass transition was -72.381°C. After the experiment, an off-white molten residue remained in the sample container.

DATA HANDLING

The glass transition temperature was determined as the mean inflection point of Experiment 1 and Experiment 2.

 

Conclusions:

A glass transition temperature of -72.6°C was determined. The substance has no melting/freezing temperature between 25°C and -90°C.

Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

The liquid substance has no melting/freezing temperature between 25°C and -90°C. From duplicate measurements the mean glass transition temperature was determined to be -72.6°C.

During heating from -90°C to 188°C reaction and/or decomposition of the substance was assumed to be occuring in the range between 50°C and 150°C

NOTE: Any of data in this dataset are disseminated by the European Union on a right-to-know basis and this is not a publication in the same sense as a book or an article in a journal. The right of ownership in any part of this information is reserved by the data owner(s). The use of this information for any other, e.g. commercial purpose is strictly reserved to the data owners and those persons or legal entities having paid the respective access fee for the intended purpose.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018