Dipotassium methanedisulphonate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

01 September 2017 - 12 September 2017

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)

Contact with:

powdered cellulose

Key result

Sample tested:

reference mixture as specified

Parameter:

maximum burning rate

Result:

ca. 1.92 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

mixture test substance with cellulose in various weight ratios (from 10% to 90%)

Parameter:

maximum burning rate

Result:

ca. 0.06 mm/s

Table 1. Results of the preliminary test

The mixture of tested substance and cellulose in ratio weight 2:1	Burning time [s]	Remarks of reaction
Test-1	--	The sample charred and glowed in the place of applying the flame of burner. The sample did not ignite. The glowing of sample take more than 15 minutes. The sample did not glow completely. Result: NEGATIVE
Test-2	--
Test-3	--
The shortest burning time of mixture of tested substance and cellulose – tp[s]	--
Burning time of standard mixture – tw[s]	34

Table 2: Results of determination of oxidizing properties for the reference mixture

Barium nitrate(V) [%]	10	20	30	40	50	60	70	80	90
Cellulose [%]	90	80	70	60	50	40	30	20	10
Burning time of the pile [s]	116	108	111	104	106	119	138	257	NI
Burning rate of the pile [mm/s]	1.72	1.85	1.80	1.92	1.87	1.68	1.45	0.78	-
Maximal burning rate of the reference mixture pile[mm/s]	1.92

Table 3: Results of determination of oxidizing properties for test item

Test substance  (content in mixture) [%]	10	20	30	40	50	60	70	80	90
Cellulose (content in mixture) [%]	90	80	70	60	50	40	30	20	10
Burning time of train [s]	(150 mm/ 3060 s)*	3180	NI	(60 mm/ 1080 s)*	2820	NI	NI	NI	NI
Burning rate of the train [mm/s]	-	0,06	-	-	-	-	-	-	-
Maximal burning rate of the reference mixture train [mm/s] (BC-106/16)	1.92

* the train does not burn completely, NI - the train does not ignite

In this determination only in one case the mixture of the test item and cellulose burnt completely but the burning time was much longer than for the reference mixture. Based on this, the burning rate of the train for the test item is much slower than for the reference mixture. Choosing of three mixtures giving the fastest burning rate is impossible. Hence, the repetition next fifth times is unfounded. One test for each mixture was carried out what was described in Table 3. According the results, the test item does not have the oxidizing criteria.

Interpretation of results:

other: Not classified (CLP Regulation EC no. 1272/2008)

Conclusions:

The tested material has not oxidizing properties in accordance with test A.17 criteria.

Executive summary:

The study of determination of oxidizing properties of solids was performed according to method A.17 Oxidizing properties for solids, following the principles of GLP. No vigorous reaction was observed in the preliminary test. The main test was performed with the reference substance and at least once with each one of the range of mixtures of the test substance with cellulose (from 10 % to 90 % of cellulose content). The maximal burning rate of the reference mixture pile was 1.92 whereas only in one case the mixture of the test item and cellulose burnt completely and the burning time was much longer than for the reference mixture. Based on this, the burning rate of the train for the test item is much slower than for the reference mixture of cellulose and barium nitrate, concluding that the tested material has not oxidizing properties.

Description of key information

Key study: Test performed according to method A.17 (Oxidizing properties for solids).GLP study. The tested material has not oxidizing properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Key study: The study of determination of oxidizing properties of solids was performed according to method A.17 Oxidizing properties for solids, following the principles of GLP. No vigorous reaction was observed in the preliminary test. The main test was performed with the reference substance and at least once with each one of the range of mixtures of the test substance with cellulose (from 10 % to 90 % of cellulose content). The maximal burning rate of the reference mixture pile was 1.92 whereas only in one case the mixture of the test item and cellulose burnt completely and the burning time was much longer than for the reference mixture. Based on this, the burning rate of the train for the test item is much slower than for the reference mixture of cellulose and barium nitrate, concluding that the tested material has not oxidizing properties.

Justification for classification or non-classification

Based on the available information, the tested material is not classified as oxidising solid according to CLP Regulation (EC) no.1272/2008.