4-chlorophenol

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16-09-2019 to 16-10-2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Guideline study performed under GLP. All relevant validity criteria were met.

Remarks:

The result is suitable for the regulatory conclusion.

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Method outlined in: UN Transport of Dangerous Goods (1988) - Orange Book

Deviations:

no

GLP compliance:

yes

Remarks:

Guideline study performed under GLP. All relevant validity criteria were met.

Test procedure:

burning rate test: preliminary screening test

Remarks on result:

other: Flame extinguished after 1s. No propagation of combustion occurred along the 200 mm length of the test item pile within 2 minutes. No further testing necessary. Test item is considered 'not flammable' under the conditions of the study.

The flame of the gas burner did ignite the test item pile. The test item melted, burned with an orange flame into a dark blue residue. Black smoke was observed. After removal of the ignition source, the flame extinguished after 1 second and no propagation of combustion was observed. No propagation of combustion of the test item along 200 mm length of the pile within 2 minutes was observed. According to the guidelines, performance of the burning rate test is not required. Based on the results obtained, the test item isconsidered 'not flammable'.

Interpretation of results:

GHS criteria not met

Remarks:

EU & GHS criteria used in assessment

Conclusions:

The flammable solid properties of the test item was determined in a burning rate test consistent with UN Transport MTC Test N.1. No propagation of the flame across 200 mm length of test item was observed within 2 minutes. Based on the results obtained, the test item is considered 'not flammable'.

Executive summary:

The flammability of the solid test item was examined using a method consistent with the UN Transport of Dangerous Goods: Manual of Tests and Criteria: Test N.1 by measuring the burning rate of the test item. In a preliminary test,

a mould (250 mm long x 20 mm wide x 10 mm high) was loosely filled with test item. Ignition of the 250 mm long pile was attempted using the flame of a gas burner applied to one end of the test item pile. The pile was visually interpreted for propagation of combustion either by burning with a flame or smouldering. The test item melted, and burned with an orange flame into a dark blue residue. Black smoke was observed. After removal of the ignition source, the flame extinguished after 1 second and no propagation of combustion was observed. No propagation of combustion along 200 mm length of the test item pile within 2 minutes was observed. According to the guidelines, performance of the definitive burning rate test is not required. Based on the results obtained, the test item is considered 'not flammable'. Applicant assessment indicates that the substance does not meet the criteria for classification as a flammable solid under the UN Transport MTC N.1: Flammable solids or CLP Regulation (EC) 1272/2008: Flammable solids criteria. The test was performed on the ground test item, which was otherwise as-presented.

Reference 2

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 organic substance does not contain metals or metalloids and hence, the classification procedure does not need to be applied

other:

Justification for type of information:

In accordance with section 1 of REACH Regulation (EC) No. 1907/2006 Annex XI, the study does not need to be performed as based on assessment of the chemical structure flammability on contact with water properties are not to be expected and this is supported by experience in handling and use for the substance. According to ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, R.7.1.10.8, July 2017), flammability on contact with water testing is scientifically unjustified.

Reference 3

Endpoint:

pyrophoric solids

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 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

other:

Justification for type of information:

In accordance with section 1 of REACH Regulation (EC) No. 1907/2006 Annex XI, the study does not need to be performed as based on assessment of the chemical structure pyrophoric properties are not to be expected and this is supported by experience in handling and use for the substance. According to ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, R.7.1.10.5, July 2017), pyrophoricity testing is scientifically unjustified.

Description of key information

Flammability: not a flammable solid; experimentally determined in preliminary screening test (no flame propagation for 2 minutes after ignition), tested under UN Method N.1 (2019).

Key value for chemical safety assessment

Flammability:

not classified

Additional information

In accordance with section 1.2 of REACH Regulation (EC) No. 1907/2006 Annex XI further study of flammability does not need to be completed based on weight of available evidence and structural assessment along with experience of handling and use.

 

The flammability of the test item was examined using the UN Method N.1: Flammability (Solids) preliminary screening test. The flammability was determined by measuring the burning rate of the test item by placing the test item in a mould (250 mm long by 20 mm wide by 10 mm high). A gas burner flame was applied to one end of the pile. Ignition of the pile occurred, but ceased within 1 second of removal of the gas burner flame. Combunstion failed to propagate through 200 mm of the test-item pile during the 2 minutes after the flame was applied. The result of the preliminary screening test negated the need to perform the main test. Under the conditions of this study, the test item was not considered to be flammable. Applicant assessment indicates that: the classification of flammable solid does not apply (not flammable) in a method consistent with the UN Test N.1 and similar to EU Method A.10 preliminary screening test. No combustion propagation of the test item was observed. For these reasons further testing to UN Test N.1 according to the full wetted zone and burning rate test, is not required. The test item is not a flammable solid or a readily combustible solid.

 

Other measures of flammability include pyrophoricity and flammability on contact with water. These can be considered not a concern for the substance and testing waived if consideration of the structure and experience in handling and use show that no effects are envisaged. Such a screening procedure represents an intelligent testing strategy for flammability. If applied correctly then only liquid substances for which it is suspected will give a positive result in either the pyrophoric properties or flammability on contact with water tests need to be tested.

 

A review of the structure suggests that there are no chemical groups present that would imply pyrophoric properties or flammability on contact with water. A review of handling and used implies no pyrophoric properties or flammability on contact with water. Based on the absence of structural alerts and experience in handling and use negative results are predicted for pyrophoric properties and flammability of contact with water. Based on the preliminary screening tests for solids flammability, the substance is not considered to be flammable.

 

References:

1. UN Transport of Dangerous Goods Manual of Tests and Criteria, Sixth Edition (2015)

2. Bretherick (1999) Bretherick’s Handbook of Chemical Reactive Hazards: An Indexed Guide to Published Data, 6th Edition (2 volume set).

3. ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, R.7.1.10, July 2017)

4. REACH Regulation (EC) 1907/2006, Annex XI, section 1

5. CLP Regulation (EC) 1272/2008, Annex I, section 2.6 and 2.7

6. ECHA Guidance on Application on the CLP Criteria, section 2.6 and 2.7 (v4.1, July 2017)

Justification for classification or non-classification

The substance does not meet classification criteria under Regulation EC (No)1272/2008 for flammability.