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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 January 2018 - 09 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
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

Test material

Constituent 1
Chemical structure
Reference substance name:
1-(5,6,7,8-tetrahydro-2-naphthyl)ethan-1-one
EC Number:
212-266-7
EC Name:
1-(5,6,7,8-tetrahydro-2-naphthyl)ethan-1-one
Cas Number:
774-55-0
Molecular formula:
C12H14O
IUPAC Name:
1-(5,6,7,8-tetrahydronaphthalen-2-yl)ethan-1-one
Test material form:
liquid
Details on test material:
Appearance: Colourless to pale yellow liquid
Specific details on test material used for the study:
Physical appearance: colourless to pale yellow liquid
Storage conditions: at room temperature protected from light, container flushed with nitrogen.

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
>= 1 003 - <= 1 027 hPa
Decomposition:
no
Remarks on result:
other: Glass transition point: -74.9°C. No melting/freezing point was determined between 25°C and -90°C.

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 225°C. 25% weight loss at 285°C and 70% weight loss at 305°C.

After the experiment it was observed that the test item was evaporated from the sample container.

 

DSC EXPERIMENT 1

During cooling, a glass transition was observed between -90°C and -70°C. During heating, a glass transition was observed between -90°C and -50°C. The inflection point of the glass transition was -74.884°C. An endothermic peak was observed between 200°C and 350°C. The extrapolated onset temperature of the peak was 299.150°C. The endothermic effect was most likely obtained due to boiling of the test item. After the experiment it was observed that the test item had evaporated from the sample container.

DSC EXPERIMENT 2

In order to investigate the endothermic peak, a higher heating rate of 50°C/minute was used in the Experiment 2. The extrapolated onset temperature was 302.285°C. The endothermic peak had not shifted significantly to higher temperatures. It demonstrated that boiling of the test item caused the endothermic effect. Since a higher heating rate was applied during this experiment, the extrapolated onset temperature was not used in the calculation of the boiling temperature. After the experiment it was observed that the test item had evaporated from the sample container.

DSC EXPERIMENT 3

Experiment 3 was performed as a duplicate of Experiment 1. Similar results as in Experiment 1 were obtained. The inflection point of the glass transition was -74.996°C. The extrapolated onset of the boiling peak was 299.920°C. After the experiment it was observed that the test item had evaporated from the sample container.

DATA HANDLING

The glass transition temperature was determined as the mean inflection point of Experiment 1 and Experiment 3.

 

Applicant's summary and conclusion

Conclusions:
A glass transition temperature of -74.9°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 -74.9°C.