Buta-1,3-diene

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP non compliant, guideline not known, information from published handbook, acceptable with restrictions

Principles of method if other than guideline:

The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.

GLP compliance:

not specified

Remarks:

No data reported

Type of method:

other: No data reported

Key result

Melting / freezing pt.:

-108.9 °C

Atm. press.:

1 013 hPa

Decomposition:

no

Sublimation:

no

Remarks on result:

other: at standard pressure

No further details reported

Conclusions:

The reported melting point of 1,3-butadiene is -108.9˚C

Executive summary:

The reported melting point of 1,3-butadiene is -108.9˚C. No information on the primary source of this data or the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint. In addition, this value was used in the EU RAR (2002) for 1,3-butadiene.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP non compliant, guideline not known, information from published handbook, acceptable with restrictions

Principles of method if other than guideline:

The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the Merck Index states that physical data are cited as found in the literature. When several alternate data values appear in the literature, the data is evaluated and representative selections are made; values are then reported with the corresponding source. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.

GLP compliance:

not specified

Remarks:

No data reported

Type of method:

other: No data reported

Key result

Melting / freezing pt.:

-108.97 °C

Atm. press.:

1 013 hPa

Remarks on result:

other: Melting point

Key result

Melting / freezing pt.:

-108.9 °C

Atm. press.:

1 013 hPa

Remarks on result:

other: Freezing point

No further details reported

Conclusions:

The reported melting point of 1,3-butadiene is -108.966˚C.

Executive summary:

The reported melting point of 1,3-butadiene is -108.966˚C. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the supporting study for this endpoint.

Description of key information

The reported melting point of 1,3-butadiene is -108.9˚C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-108.9 °C

Additional information

The CRC Handbook (Lide, 2008) is a peer-reviewed handbook and is considered reliable and suitable for use as the key study for this endpoint. In addition, this value is used in the EU RAR (2002) for 1,3-butadiene. The Merk Index (2006) also a peer reviewed handbook, gives a melting point of -108.966°C and supports the value reported in the key study.