2(1H)-Pyridinone, 1-(acetyloxy)-

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

other: Internal communication

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

15 May 2013 to 17 March 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Conducted according to current test guidelines and GLP compliant

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

> 303 °C

Decomposition:

yes

Decomp. temp.:

>= 188 - <= 303

Remarks on result:

other: Test idem decomposes

The DSC was checked with an indium standard and gave a melting onset at 156,59 °C with a normalised energy of -28,48 Jg^-1. This was within the specification of 156,3 to 156,9 °C and -27,45 to -29,45 Jg^-1, the instrument was therefore considered to be fit for purpose.

 

An endotherm equating to a melting temperature, and exotherm equating to decomposition were recorded. The melting endotherm was well defined so the onset and peak temperatures are appropriate. The decomposition was over a large temperature range so the left and right limits were recorded.

Sample 1:      Melting temperature, onset 96,02 °C, peak temperature 97,78 °C.
                       Decomposition: 189,48 to 298,25 °C.

Sample 2:      Melting temperature, onset 95,99 °C, peak temperature 99,11 °C.
                       Decomposition: 186,61 to 307,38 °C.

Mean melting temperature onset: 96°C.

Mean decomposition temperature range: 188°C to 303°C.

The atmospheric pressure at the time of testing was measured as 98.4986 kPa.

Conclusions:

An endotherm equating to a melting temperature, and exotherm equating to decomposition were recorded. The melting endotherm was well defined so the onset and peak temperatures are appropriate. The decomposition was over a large temperature range so the left and right limits were recorded.
The mean melthing temperature onset for Oxypyrionacetate was 96°C.
The mean decomposition temperature range was 188°C to 303°C.

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

2011

Report date:

2011

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

No information provided

Type of method:

other: not specified

Test material

Test material information

Constituent 1

Reference substance name:

2-oxo-1,2-dihydropyridin-1-yl acetate

EC Number:

689-986-7

Cas Number:

1742-79-6

Molecular formula:

C7H7NO3

IUPAC Name:

2-oxo-1,2-dihydropyridin-1-yl acetate

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Results and discussion

Melting / freezing point

Melting / freezing pt.:

ca. 94 °C

Applicant's summary and conclusion

Conclusions:

The melting point is about 94 °C.