(1α,2α,5α)-2,2,6-trimethylbicyclo[3.1.1]heptan-2-ol

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable gases

Data waiving:

study technically not feasible

Justification for data waiving:

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

Reference 2

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2021-09-22

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Version / remarks:

2019

Deviations:

no

GLP compliance:

no

Key result

Test procedure:

burning rate test over 100 mm length

Burning time:

34 s

Preliminary Test

The burning time over a distance of 200 mm is 86 s. This is below the threshold of the burning time of 2 minutes according to UN Transportation Regulation and GHS / CLP Regulation.

Therefore, the main test had to be performed.

 

Main Test

In the main test the burning time over a distance of 100 mm after a pre-burning distance of 80 mm was measured. The burning time over a distance of 100 mm is 34 s. It was observed that the test item melted and at least the liquid phase of the test item was heavily burning. This burning time is less than 45 seconds over a distance of 100 mm and the flame passed the wetted zone. Due to the fact that already in the first test the burning time was below 45 s (no metal), no further tests were necessary.

Interpretation of results:

Category 1 (flammable solids) based on GHS criteria

Conclusions:

The substance has to be classified as flammable solid in category 1 (Signal Word: Danger) with the Hazard Statement H228.

Executive summary:

A study was conducted according to UN Test N.1. Therefore, the test item was formed into a powder train. It was ignited by a gas flame and the burning rate is determined. As the burning time over a distance of 200 mm in the preliminary test was 86 s the main test was performed. The burning time in the main test was found to be 34 s over a distance of 100 mm. Due to the fact that the burning time was found to be below the threshold of 45 s over a distance of 100 mm, the substance has to be classified as flammable solid in category 1 (Signal Word: Danger) with the Hazard Statement H228.

Reference 3

Endpoint:

pyrophoric liquids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

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

Reference 4

Endpoint:

pyrophoric solids

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied

Reference 5

Endpoint:

self-heating substances / mixtures

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is completely molten at 160°C

Reference 6

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Description of key information

The substance has to be classified as flammable solid in category 1 (Signal Word: Danger) with the Hazard Statement H228.

The substance has not to be classified as flammable gas, flammable liquid, flammable in contact with water, flammable aerosol, pyrophoric solid, pyrophoric liquid or self-heating substance.

Key value for chemical safety assessment

Flammability:

flammable

Additional information

Flammable gases

The test item is a solid at ambient conditions. This hazard class is only applicable for gases. Thus, the substance was not considered for classification as flammable gas.

 

Flammable liquid

The test item has a waxy consistency at room temperature and a melting range of 31 to 44 °C. For safe handling of the test item, not only the flammability of the test item was investigated but also the flash point for the molten state. The flash point of the test item was determined in an experimental study according to Regulation EC No 440/2008 Method A.9 and DIN EN ISO 3679 using the rapid equilibrium method in a closed cup. The mean flash point was determined to be 94 °C at 1013 hPa. Therefore the test item has not to be classified as flammable liquid.

 

Flammable solids

A study was conducted according to UN Test N.1. Therefore, the test item was formed into a powder train. It was ignited by a gas flame and the burning rate is determined. As the burning time over a distance of 200 mm in the preliminary test was 86 s the main test was performed. The burning time in the main test was found to be 34 s over a distance of 100 mm. Due to the fact that the burning time was found to be below the threshold of 45 s over a distance of 100 mm, the substance has to be classified as flammable solid in category 1 (Signal Word: Danger) with the Hazard Statement H228.

 

Pyrophoric liquids

The test item is a solid at ambient conditions. This hazard class is only applicable for liquids. Thus, the substance was not considered for classification as flammable liquid.

 

Pyrophoric solids

In accordance with section 2.10.4 Annex I of Regulation (EC) No 1272/2008 and ECHA guidance on the application of CLP Criteria section 2.10.4.1 the classification procedure for pyrophoric solids needs not to be applied when experience in manufacture or handling shows that the solid does not ignite spontaneously on coming into contact with air at normal temperatures (i.e. the solid is known to be stable at room temperature for prolonged periods of time (days)). Based on the experience in handling and use the substance is not known to ignite spontaneously when coming into contact with air at normal temperatures. Thus, no study was conducted and the substance was not considered for classification as pyrophoric solid.

 

Self-heating substances and mixtures

In accordance with ECHA guidance on the Application of the CLP Criteria section 2.11.4.2 and ECHA guidance on IR/CSA chapter R.7a section R7.1.10.7 the test does not to be conducted as in general liquids and low melting solids are not classified as self-heating since the phenomena applies only to solids and the test method is not applicable to liquids and low melting solids according to ECHA guidance on the Application of the CLP Criteria section 2.11.4.2.

 

Substances which, in contact with water, emit flammable gases

In accordance with column 2 of REACH Annex VI and with Regulation (EC) No 1272/2008 Annex I section 2.12.4 and ECHA guidance on the application of CLP Criteria section 2.12.4.2 the classification procedure for this hazard class needs not to be applied. Based on the experience in handling and use the substance does not react with water and in addition the test substance is not pyrophoric. Thus, no study was conducted and the substance was not considered for classification.

 

Flammable Aerosols

Section 2.4.2 of Guidance on the application on the CLP Criteria state as follows: “Aerosols, this means aerosol dispensers, are any non-refillable receptacles made of metal, glass or plastics and containing a gas compressed, liquefied or dissolved under pressure, with or without a liquid, paste or powder, and fitted with a release device allowing the contents to be ejected as solid or liquid particles in suspension in a gas, as a foam, paste or powder or in a liquid state or in a gaseous state." Thus, as the substance does not meet the definition for aerosol, the test for aerosols was waived. Consequently the substance has not to be considered for classification for this hazard class.

 

In conclusion, the substance has to be classified as flammable solid in category 1 (Signal Word: Danger) with the Hazard Statement H228.

The substance has not to be classified as flammable gas, flammable liquid, flammable in contact with water, flammable aerosol, pyrophoric solid, pyrophoric liquid or self-heating substance.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008

In accordance with Annex I Section 2.2, Section 2.3, Section 2.7, Section 2.9, Section 2.10 Section 2.11, Section 2.12 of Regulation (EC) No 1272/2008, as amended for the eighteenth time in Regulation (EU) 2022/692, and UN GHS Rev 9 (2021) the test item has to be classified as, readily combustible solid in class 4 Division 4.1, but has not to be classified as flammable liquid, self-heating substance in Class 4 Division 4.2, substances which in contact with water emit flammable gases in Class 4 Division 4.3, pyrophoric liquid, pyrophoric solid in class 4 Division 4.2, flammable gases in class 2 or as aerosol in class 2.