Buta-1,3-diene

Appearance / physical state / colour

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

appearance / physical state / colour

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

Physical state at 20°C and 1013 hPa:

gaseous

Colour:

Colourless

Odour:

other: mild aromatic

Substance type:

organic

Conclusions:

1,3-Butadiene is a colourless gas with a mild aromatic odour at standard temperature and pressure

Executive summary:

1,3 -Butadiene is a colourless gas, with a mild aromatic odour. No information on the method 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.

Reference 2

Endpoint:

appearance / physical state / colour

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

Physical state at 20°C and 1013 hPa:

gaseous

Colour:

Colourless

Substance type:

organic

Conclusions:

1,3-butadiene is a colourless gas at standard temperature and pressure

Executive summary:

1,3 -Butadiene is a colourless gas. No information on the method used is available. However, this information is taken from the CRC handbook which is a peer reviewed soruce and so can be considered reliable and suitable for use as the supporting study for this endpoint.

Description of key information

1,3-Butadiene is a colourless gas with a mild aromatic odour at standard temperature and pressure.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:

gaseous

Form:

gas under pressure: liquefied gas

Additional information

No information on the method used is available. However, this information is taken from the CRC handbook which is a peer reviewed source and so can be considered reliable and suitable for use as the supporting study for this endpoint. This result is supported by data from a reliable peer reviewed handbook (O'Neil 2006) indicating that 1,3 -butadiene is a gas.