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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Flammability

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The main study was not conducted as preliminary tests indicated, that the test substance could not be ignited with a flame.
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Qualifier:
according to guideline
Guideline:
other: VDI 2263, sheet 1
GLP compliance:
not specified
Test procedure:
ignition time on contact with air
Remarks:
Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state (migrated information).
Remarks on result:
no ignition on contact with air (not further specified)
Remarks:
corresponding to 'no' in migrated source record.
Test procedure:
ignition time on contact with air
Remarks:
Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state (migrated information).
Remarks on result:
no ignition on contact with air (not further specified)
Remarks:
corresponding to 'no' in migrated source record.

Individual results

The test item could not be ignited with a flame. Only melting of the test item was observed. A main test was therefore not necessary.

The combustion behaviour of the product at ambient temperature is characterized by the combustion number BZ 1 (no ignition).

Final results

The test item is not a highly flammable solid in the sense of the European Commission Regulation (EC) No.440/2008, Method A.10.

The test item has a burning number of BZ 1 according to VDI 2263, sheet 1.

Conclusions:
The test item is not a highly flammable solid according to the EC Regulation No 440/2008, Method A.10.
The test item has a burning number of BZ 1 according to VDI 2263, sheet 1.
Executive summary:

The flammability (solids) of the test item Hostanox O 3 was performed according to EC method A.10 and according to the guideline VDI 2263, sheet 1. The test item is not highly flammable solid according to the EC Regulation No.440/2008, Method A.10. The test item has a burning number of BZ 1 according to guideline VDI 2263, sheet 1

Description of key information

Two studies were performed to determine the flammability of ethylene bis[3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate] (Hostanox O 3, CAS 32509-66-3). One study was conducted according to the EU Method A.10 and the guideline VDI 2263, sheet 1. The other study was conducted according to the guideline VDI 2263, sheet one.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

According to EU Method A.10 criteria, the substance was reported to be non-highly flammable, with no ignition during preliminary test.

The two studies reported a melting of the test material, without ignition. For the two studies, a burning number (Brennzahl) of 1 (indicating no ignition of the test material) was reported.

Justification for classification or non-classification

According to CLP Regulation, Annex I, table 2.7.1 on criteria for flammable solids, and according to the Guidance an Application of the CLP Regulation, section 2.8.4.5 Decision logic, as the screening test is negative, ethylene bis[3,3 -bis(3 -tert-butyl-4 -hydroxyphenyl)butyrate] (Hostanox O 3, CAS 32509 -66 -3) should not be classified as flammable solid.