Pyrasulfotole

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and hence, the classification procedure does not need to be applied

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

24 Aug 2005 - 26 Oct 2005

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

GLP compliance:

yes (incl. QA statement)

Remarks:

GLP certifying authority: Hess. Ministerium für Umwelt, Landwirtschaft und Forsten, Wiesbaden, Germany

Contact with:

powdered cellulose

Duration of test (contact time):

>= 185 - <= 1 113 s

Key result

Sample tested:

test mixture as specified

Parameter:

maximum burning rate

Result:

1.08 mm/s

Remarks on result:

other: Max burn rate < ref mixture

Remarks:

No oxidizing properties.

Key result

Sample tested:

reference mixture as specified

Parameter:

maximum burning rate

Result:

1.16 mm/s

Remarks on result:

other: 55% barium nitrate/cellulose

Final Results – Oxidizing Properties

The highest burning rate of 1.16 mm/s was found for the reference mixture (barium nitrate (oxidizer) and cellulose) with 55% oxidizer. Mixtures of the test item with cellulose were prepared in 10 %-increments. Additional tests with 5, 55, 65 and 100 wt% test item were performed. The following table shows the results.

 

Test item[%]	Burning time over 200mm [s]	Burning rate [mm/s]
5	232	0.86
10	190	1.05
20	195	1.03
30	199	1.01
40	208	0.96
50	203	0.99
55	185	1.08
60	187	1.07
65	220	0.91
70	202	0.99
80	1113	0.18
90	Due to the fact that the mixture with 80%of test item burned slower,no tests were performed for this mixture	---
100	The test item could not be ignited with a flame,the test item melted	---

 

 

Six tests were performed for the mixtures with the highest burning rates of 50, 55 and 60 wt% of test item.

 

 

Test:	t[s]	V[mm/s   t[s]		V[mm/s]It[s]		V[mm/s]	t[s]	V[mm/s]	t[s]	V[mm/s]	t[s]	V[mm/s
50%	203	0.99	189	1.06	210	0.95	208	0.96	209	0.96	191	1.05
55%	185	1.08	193	1.04	188	1.06	201	1.00	196	1.02	212	0.94
60%	187	1.07	218	0.92	217	0.92	210	0.95	220	0.91	205	0.98

 

 

 

 

 

 

 

 

The maximum burning rate of the mixtures of the test item and cellulose (1.08 mm/s) was less than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.16 mm/s).

(Note: Due to the results of the preliminary test, the full test had to be performed.)

Description of key information

The test item has no oxidising properties (EU A.17). There are no chemical groups associated with oxidising properties present in the molecule.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

The available data on oxidizing properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification. Based on chemical structure and from details of EU A.17 test it can be deduced that the substance is not oxidising.