Biphenyl-4,4'-diol

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11-11-2011 to 15-11-2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Modern, GLP study conducted to the appropriate EU Method.

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Biphenyl-4,4’-diol / CAS 92-88-6

Contact with:

powdered cellulose

Key result

Sample tested:

other: Cellulose mixture with 50% of test item

Parameter:

maximum burning rate

Result:

0.7 mm/s

Key result

Sample tested:

other: cellulose mixture with 60% of reference item

Parameter:

maximum burning rate

Result:

1.2 mm/s

Preliminary Study

The 2:1 reference item / cellulose mixture ignited immediately when touched by the hot flame of the gas burner. The cone burned with a yellowish to green flame completely (also in the core of the cone) within approximately 37 seconds.

 

The 2:1 test item / cellulose mixture ignited when touched by the hot flame of the gas burner. The half of the cone burned down with a yellow flame. No ash was spread around the cone. Within 3 minutes and 18 seconds the surface of the cone carbonized to a black residue.

Definitive Study

No test item / cellulose mixture showed a faster burning rate as the fastest reference item / cellulose mixture. The results are presented in the table below;

	Mixture [%]	Burning time (200 mm) [s]	Burning rate [mm / s]	Observation
Test Item	10	81	incomplete combustion, no expressive burning rate could be calculated	The flame went out after 81 seconds.
	20	280	incomplete combustion, no expressive burning rate could be calculated	The mixture burned down uneven and incomplete.
	30	333	incomplete combustion, no expressive burning rate could be calculated	Same observation as above (20%).
	40	228	incomplete combustion, no expressive burning rate could be calculated	The mixture burned down uneven and incomplete. Furthermore crackling was observed.
	50	280	0.7	The mixture burned down uneven. Moreover a bigger flame and soot development was observed.
	60	435	0.5	Same observation as above (50%).
	70	360	0.6	Same observation as above (50%).
	80	355	0.6	The mixture burned down uneven. Moreover a bigger flame and soot development as in the 50% mixture was observed.
	90	456	0.4	Same observation as above (80%).
Reference Item	50	234	0.9	Same reaction as preliminary study.
	60	161	1.2	Same reaction as preliminary study.
	70	249	0.8	Same reaction as preliminary study.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance showed in the preliminary part and in the first part of the definitive study a much weaker reaction in comparison with the reference item. In addition, the test substance does not contain any groups associated with oxidising properties. It can therefore be concluded that biphenyl-4,4'-diol is non oxidising.

Executive summary:

The test was conducted to EC Method A.17.

In the preliminary part of the study a cone of a 2:1 test item / cellulose mixture burned incomplete for 3 minutes and 18 seconds. In comparison to the reference item (in 37 seconds completely burned down) the test item showed a much weaker reaction.

 

In the first part of the definitive study no test item / cellulose mixture showed a faster burning rate as the fastest reference item cellulose mixture.

It was concluded that the test item (biphenyl-4,4'-diol) is non-oxidising.

Description of key information

The test substance was determined to be non-oxidising in a study conducted using the EU Method A.17.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

No classification is proposed. There is no evidence that the substance is oxidising.