Cyclopentane

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Up to 2007

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No data on GLP/guideline compliance but handbook is peer reviewed and considered a reliable source.

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 NIOSH Pocket Guide to Chemical Hazards is intended as a source of general industrial hygiene information for workers, employers, and occupational health professionals. The Pocket Guide presents key information and data from the US Department of Health and Human Services and as such is a reliable governmental source of information.

GLP compliance:

not specified

Remarks:

Not reported

Key result

Parameter:

lower explosion limit

Value:

1.1 % (not further specified)

Key result

Parameter:

upper explosion limit

Value:

8.7 % (not further specified)

Interpretation of results:

highly flammable

Conclusions:

The upper and lower explosion limits for cyclopentane are 1.1-8.7 % respectively.

Executive summary:

There is no available information on the methods used to determine the value for this endpoint. However, this information is taken from the NIOSH Pocket Guide is considered to be a reliable peer reviewed source of information published by a govenment body and suitable for use as the key study for this endpoint. The upper and lower explosion limits for cyclopentane are 1.1-8.7 % respectively.

Reference 2

Endpoint:

flammable solids

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Description of key information

The flammability is between 1.1 and 8.7 % v/v for cyclopentane, based on literature values.

Key value for chemical safety assessment

Flammability:

highly flammable

Additional information

The flammability is between 1.1 and 8.7 % v/v for cyclopentane based on literature values. This range has been agreed by the consortium to represent the substance. This is supported by a range of 1.1 to 8.7 % v/v from the NIOSH Pocket Guide (NIOSH 2007). There is no information available on the methods used to determine the value for this endpoint. However, the NIOSH Pocket Guide is considered to be a reliable, peer-reviewed source of information published by a government body and suitable for use as a study for this endpoint.

Justification for classification or non-classification

The boiling point for cyclopentane is 48 to 50°C and the flashpoint is -20°C. These values have been agreed by the consortium to represent the substance and are supported by secondary sources. According to the CLP legislation (2008) a liquid with a flash point of <23°C and a boiling point of >35°C is classified as a Category 2 flammable liquid with the hazard statement "highly flammable liquid and vapour".