4-[bis(phenylsubstituted)substituted]phthalic acid

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental starting date: 07 December 2017. Experimental completion date: 29 March 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Contact with:

powdered cellulose

Sample tested:

test mixture as specified

Remarks:

20% test item / 80%cellulose

Parameter:

maximum burning rate

Result:

1.48 mm/s

Remarks on result:

other: positive

Remarks:

burning rate that was greater than the fastest burning rate measured for the reference mixtures.

Sample tested:

reference mixture as specified

Remarks:

60 % barium nitrate / 40% cellulose

Parameter:

maximum burning rate

Result:

1.38 mm/s

Preliminary Test:

The barium nitrate/cellulose mixture quickly ignited giving a green/yellow flame and grey fumes. As the pile charred, sections glowed orange. After the flame had propagated across the entire pile, it self-extinguished leaving a charred residue. The burning took approx. 28 seconds from ignition to self-extinguishing.

The test item/cellulose mixture quickly ignited giving a orange/yellow flame and dark grey fumes. The flame slowly propagated down the pile, becoming larger and more intense as it did. Once the flame had reached the base it rapidly shrunk in size and intensity releasing a greater amount of light grey flames before self-extinguishing. The burning took 2 min 29 s from ignition to self-extinguishing. The pile was charred, black and crumbly.

Main Test:

The results of the main test are detailed in the following tables:

Reference Mixtures

% Barium Nitrate	Observations	Burning Time (s)	Burning Rate (mm/s)
10	Ignited giving a blue-edged, green/yellow flame, light grey fumes and orange sparks that propagated along the pile	246	0.81
20	As 10%	227	0.88
30	As 10%	184	1.09
40	As 10%	200	1.00
50	As above, but flame larger and no blue edge	175	1.14
60	As 50%, although flame is more green than yellow	145	1.38
70	As 60%	18	1.12
80	As 60%, but a smaller flame	453	0.44
90	Briefly ignited with a blue-edged, green/yellow flame, but self-extinguished before propagating	n/a	n/a

 

Maximum burning rate: 1.38 mm/s

Sample Mixtures

% Test Item	Observations	Burning Time (s)	Burning Rate (mm/s)
10	Ignited with blue-edged yellow flame, grey fumes which propagated along the pile	203	0.99
20	As 10%	138	1.45
30	As 20%	148	1.35
40	As 20%	200	1.00
50	As 20%	188	1.06
60	As 20%	180	1.11
70	As 20%	253	0.79
80	Briefly ignited with fumes (as 10%) but self-extinguishing before propagation. Test item appeared partially melted.	n/a	n/a
90	As 80%	n/a	n/a

Fastest burning rate: 1.45 mm/s

The results of the three fastest burning rates are detailed in the following tables:

Fastest Buring Rate Mixture Ration: 20:80

Replicate	Observations	Burning Time (s)	Burning Rate (mm/s)
1	Ignited with a blue-edged yellow flame and grey fumes which propagated along the pile.	151	1.32
2	As replicate 1	171	1.17
3	As replicate 1	135	1.48
4	As replicate 1	166	1.20
5	As replicate 1	140	1.43
6	As replicate 1	173	1.16

Maximum burning rate: 1.48 mm/s

Second Fastest Burning Rate Mixture Ratio: 30:70

Replicate	Observations	Burning Time (s)	Burning Rate (mm/s)
1	Ignited with a blue-edged yellow flame and grey fumes which propagated along the pile.	171	1.17
2	As replicate 1	155	1.29
3	As replicate 1	159	1.26
4	As replicate 1	183	1.09
5	As replicate 1	160	1.25
6	As replicate 1	169	1.18

 Maximum burning rate: 1.29 mm/s

Third Fastest Burning Rate Mixture Ratio: 60:40

Replicate	Observations	Burning Time (s)	Burning Rate (mm/s)
1	Ignited with a blue-edged yellow flame and grey fumes which propagated along the pile.	169	1.18
2	As replicate 1	185	1.08
3	As replicate 1	192	1.04
4	As replicate 1	176	1.14
5	As replicate 1	207	0.97
6	As replicate 1	199	1.01

Maximum burning rate: 1.18 mm/s

Discussion:

Using the criteria given in Method A.17 of Commission Regulation (EC) No 440/2008 of 30 May 2008, the result obtained from the main test determined the test item to have oxidizing properties as it had a burning rate that was greater than the fastest burning rate measured for the reference mixtures.

Conclusions:

The test item has been determined to have oxidizing properties.

Executive summary:

The determination was carried out using a procedure designed to be compatible with Method A.17 Oxidising Properties (Solids) of Commission Regulation (EC) No 440/2008 of 30 May 2008.

The result obtained from the main test determined the test item to have oxidizing properties as it had a burning rate that was greater than the fastest burning rate measured for the reference mixtures.

The test item has been determined to have oxidizing properties.

Description of key information

Using the criteria given in Method A.17 of Commission Regulation (EC) No 440/2008 of 30 May 2008, the result obtained from the main test determined the test item to have oxidizing properties as it had a burning rate that was greater than the fastest burning rate measured for the reference mixtures.

Key value for chemical safety assessment

Oxidising properties:

oxidising

Justification for classification or non-classification

The available study (A.17) determined the test item to have oxidizing properties. However, the study does not provide results which can be assessed against the CLP criteria to assign the relevant classification category (1, 2 or 3).