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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties


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flammable gases
Type of information:
experimental study
Adequacy of study:
key study
Study period:
not specified
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restricitons
Justification for type of information:
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.
Specific details on test material used for the study:
not specified
Key result
lower explosion limit
2.7 % (not further specified)
Key result
upper explosion limit
36 % (not further specified)


Interpretation of results:
other: not specified
The flammability of Ethylene is ranging from 2.7% to 36%.
Executive summary:

The flammability of Ethylene is ranging from 2.7% to 36%.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 supporting study for this endpoint.

Description of key information

The explosion limits of ethylene are 2.7-36%

Key value for chemical safety assessment


Additional information

The CRC Handbook (Lide 2008) is peer-reviewed and is considered reliable and suitable for use as a key study for this endpoint. The supporting study (World Health Organisation 1996) is taken from a peer reviewed data base and reports the same values as the key study.

Justification for classification or non-classification

This flammable range will result in a classification of Category 1, hazard statement 'Extremely flammable gas'.