4-Butoxy-2,3-difluorophenylboronic Acid (contains varying amounts of Anhydride)

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising 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:

oxidising liquids

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 3

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19.-25.01.2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

no

Key result

Sample tested:

test mixture as specified

Remarks:

2/1: test item/cellulose

Parameter:

preliminary test

Result:

> 181 - < 221 s

Key result

Sample tested:

reference mixture as specified

Remarks:

barium nitrate and cellulose

Parameter:

maximum burning rate

Result:

1.58 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

10-90 % Test item and cellulose

Parameter:

maximum burning rate

Result:

1.02 mm/s

Preliminary test:

Three test mixtures with the test item and cellulose 2:1 burned down completely in 181 s, 221 s an 200 s, respectively.

Three test mixtures with barium nitrate/cellulose 2:1 burned down completely in 63 s, 61 s and 57 s, respectively.

Due to the results of the preliminary test the main test had to be performed.

 

 

Main test:

Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % oxidizer (barium nitrate). The results are shown in Table 1.

Table 1: Burning times and rates of reference mixtures

Barium nitrate [wt. %]	Burning time over 200 mm [s]	Burning rate [mm/s]
50	153	1.31
55	135	1.48
60	131	1.58
70	155	1.29

The highest burning rate of 1.58 mm/s was found for the mixture with 60 wt. % oxidizer.

Mixtures of the test item with cellulose were prepared in between 10 and 90 wt. % of the test item and tested. Table 2 shows the results.

Table 2: Burning times and rates of test item mixtures

Test item [%]	Burning time over 200 mm [s]	Burning rate [mm/s]
10	201	1.00
20	211	0.95
30	254	0.79
50	247	0.81
60	219	0.91
70	233	0.86
90	381	0.53

Due to the fact that the maximum burning rate of the mixtures of the test item with cellulose is lower than the maximum burning rate of the reference mixture, six tests were performed only with the three mixtures (10, 20 and 60 wt.% of the test item) with the highest burning rates to verify these values (see Table 3).

Table 3: Burning times and rates of the fastest test item mixtures

Test:	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]
10 %	201	1.00	197	1.02	213	0.94	210	0.95	205	0.98	206	0.97
20 %	211	0.95	218	0.92	229	0.84	220	0.91	227	0.88	224	0.89
60 %	219	0.91	207	0.97	222	0.90	229	0.87	225	0.89	229	0.87

Each mixture was measured 6 times. The mean burning rate for the mixture with the highest burning rate (10 %) was 0.98 mm/s. The difference between the mean burning rate and the maximum burning rate was <= 10 % for this mixture.

The maximum burning rate of the mixtures of the test item and cellulose (1.02 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.53 mm/s).

Due to the fact that the mixture of the test item with cellulose burned slower compared to the reference mixture it was concluded that the test item has no oxidising properties.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item had no oxidising properties in the sense of method A.17.

Executive summary:

A test according to EC Method A.17 has been performed with the substance. As a result, the maximum burning rate of the mixures of the test item and cellulose (1.02 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.58 mm/s). Due to the fact that the mixture of the test item with cellulose burned slower compared to the reference mixture it was concluded that the test item had no oxidizing properties.

Description of key information

The test item has no oxidising properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Oxidising 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 oxidising gas.

 

Oxidising liquid

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 oxidising liquid.

 

Oxidising solid

A test according to EC Method A.17 has been performed with the substance. As a result, the maximum burning rate of the mixures of the test item and cellulose (1.02 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.58 mm/s). Due to the fact that the mixture of the test item with cellulose burned slower compared to the reference mixture it was concluded that the test item had no oxidizing properties.

Justification for classification or non-classification

Based on the chemical structure and taking into account the provisions laid down in Regulation (EC) No. 1272/2008, the substance is not considered to be classified for oxidising properties.