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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Appearance / physical state / colour

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Administrative data

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Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline, 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
Specific details on test material used for the study:
N/A
Physical state at 20°C and 1013 hPa:
gaseous
Key result
Colour:
colourless

N/A

Conclusions:
Butane is a colourless gas at standard temperature and pressure.
Executive summary:

Butane is a colourless gas at standard temperature and pressure. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline, 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
Specific details on test material used for the study:
N/A
Physical state at 20°C and 1013 hPa:
gaseous
Key result
Colour:
colourless

N/A

Conclusions:
Ethane is a colourless gas at standard temperature and pressure.
Executive summary:

Ethane is a colourless gas at standard temperature and pressure. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline, 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
Specific details on test material used for the study:
N/A
Physical state at 20°C and 1013 hPa:
gaseous
Key result
Colour:
colourless

N/A

Conclusions:
Isobutane is a colourless gas at standard temperature and pressure.
Executive summary:

Isobutane is a colourless gas at standard temperature and pressure. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline, 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
Specific details on test material used for the study:
N/A
Physical state at 20°C and 1013 hPa:
gaseous
Key result
Colour:
colourless

N/A

Conclusions:
Methane is a colourless gas at standard temperature and pressure.
Executive summary:

Methane is a colourless gas at standard temperature and pressure. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline, 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
Specific details on test material used for the study:
N/A
Physical state at 20°C and 1013 hPa:
gaseous
Key result
Colour:
colourless

N/A

Conclusions:
Propane is a colourless gas at standard temperature and pressure.
Executive summary:

Propane is a colourless gas at standard temperature and pressure. This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Description of key information

At standard temperature and pressure, the streams in this category are colourless gases or liquefied gases, either odourless or with slight characteristic, hydrocarbon or aromatic odours.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
gaseous

Additional information

Data from the CRC handbook (Lide 2008) were available for the substances methane, ethane, propane, butane and isobutane. Data are also available from the Merck handbook (O’Neill 2006) for methane, ethane, propane and butane. The information is taken from reliable peer reviewed handbooks and so can be considered reliable and suitable for use for this endpoint.