Reaction mass of potassium trifluoroacetate and potassium trifluoromethanesulphinate

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Non GLP study but following the standard guidelines

Qualifier:

according to guideline

Guideline:

EU Method A.21 (Oxidising Properties (Liquids))

Deviations:

yes

Remarks:

see methods

GLP compliance:

no

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture 1:1

Parameter:

mean pressure rise time

Result:

23 306 ms

Remarks on result:

other: Not oxidizing

Remarks:

Mean pressure rise time for the reference substance: 3016 ms

Mixture reference item / cellulose

The results of the Mixture reference item / cellulose are presented below.The mean pressure rise time obtained with the reference item / cellulose mixture was: 3016 ms.

 

Mixture reference item / cellulose results

Assay No.	Reference item mass(g)	Cellulose mass (g)	Atmospheric pressure(kPa)	Corrected pressure rise time(ms)	Mean corrected pressure rise time(ms)	Theorical calculated min and max accepted value: ± 30% of the mean pressure rise time(ms)
1	2.5	2.5	96.8	2976	3016
2	2.5	2.5	96.8	3660
3	2.5	2.5	96.8	2823		[2111 ; 3921]
4	2.5	2.5	96.8	2986
5	2.5	2.5	96.8	2635

Remark: Another assay was performed, but due to a leak problem, this assay was not taken into account.

 

 

Mixture test item / cellulose

The results of the Mixture test item / cellulose are presented below.The mean pressure rise time obtained with the test item / cellulose mixture was: 23306 ms.

 

Mixture test item / cellulose results

Assay No.	Test item mass (g)	Cellulose mass (g)	Atmospheric pressure(kPa)	Corrected pressure rise time(ms)	Mean corrected pressure rise time(ms)	Theorical calculated min and max accepted value: ± 30% of the mean pressure rise time(ms)
1	2.5	2.5	96.8	23069	23306
2	2.5	2.5	96.8	19740
3	2.5	2.5	96.8	28520		[16314 ; 30298]
4	2.5	2.5	96.8	18790
5	2.5	2.5	96.8	26409

 

Interpretation of results:

GHS criteria not met

Conclusions:

The reaction mass TFSK/TFAK in aqueous solution is not oxidizing.

Executive summary:

The aim of the study is to determine the oxidizing properties of the reaction mass potassium trifluoromethanesulfinate and potassium trifluoroacetate in aqueous solution (approximately at 36%), according to the regulation EU A21 (2008)

The test item was mixed in a 1 to 1 ratio by weight with dried fibrous cellulose and introduced into a pressure vessel.

The mean pressure rise time obtained with the mixture test item / cellulose was slower than the mean pressure rise time obtained with the reference item / cellulose mixture.

The test item (Reaction mass TFSK/TFAK in aqueous solution at approximately 38%) is not considered to have oxidising properties in the experimental conditions.

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

29 Jul 2016 - 21 Sept 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)

Version / remarks:

2015

Deviations:

yes

Remarks:

particle sizes of potassium bromate < 150 µm and testing temperature of ca 27°C. Not considered to have affected the quality/interpretation of the results

GLP compliance:

yes (incl. QA statement)

Remarks:

28 Jul 2015

Contact with:

powdered cellulose

Duration of test (contact time):

3 min

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

mixture does not ignite and burn

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

mixture does not ignite and burn

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

195 s

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

99 s

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

3 s

Experimental conditions

Atmospheric pressure: 97.9 kPa

Relative humidity: Between 44.2% and 48.3%

Temperature: Between 26.5 °C and 27.7 °C

Time of reaction with the test item

 

Mixture Test item / Cellulose	Time and observed reaction(s)
4:1	/	The cone inflated and was calcined between 80% to 90% after 3 minutes.
	/
	/
	/
	/
Mean time of reaction with the 4:1 mixture:/
1:1	/	The cone inflated and was calcined between 70% to 80% after 3 minutes.
	/
	/
	/
	/
Mean time of reaction with the 1:1 mixture: /

 Time of reaction with the reference item

 

Mixture Reference item / Cellulose	Time and observed reaction(s)
3:7	206	Ignition
	215
	180
	182
	192
Mean time of the main reaction with the 3:7 mixture: 195 s
2:3	97	Ignition
	80
	109
	113
	97
Mean time of the main reaction with the 2:3 mixture: 99 s
3:2	5	Explosive ignition
	3
	6
	4
	5
Mean time of the main reaction with the 3:2 mixture: 5 s

Interpretation of results:

GHS criteria not met

Conclusions:

No main reaction was recorded with the test item / cellulose mixture in proportions 1:1 and 4:1. Therefore, the test item was not considered as an oxidising solid of Division 5.1 and thus was not assigned to any packing group and not classified as an oxidising solid under CLP regulation.

Executive summary:

The objective of the study was to determine the capacity of a solid matter to increase the rate or the intensity of burning reaction of a combustible item being dry fibrous cellulose, according to the UN Test O.1 (Part III, Section 34.4.1) guideline and under GLP conditions. No main reaction was recorded with the test item / cellulose mixture in proportions 1:1 and 4:1. Therefore, the test item was not considered as an oxidising solid of Division 5.1 and thus was not assigned to any packing group and not classified as an oxidising solid under CLP regulation.

Description of key information

Based on an experimental data performed on both the dry form and the aqueous form of the reaction mass, the test item is not considered as oxidizing.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Experimental data are available on both the dry form and the aqueous solution of the reaction mass of potassium trifluoroacetate and potassium trifluoromethanesulphinate (Reaction mass of TFAK and TFSK). According to these data, no oxidizing properties are suspected whatever the form was.

 

Justification for classification or non-classification

Based on an experimental data performed on both the dry form and the aqueous solution (approximately 36%), the reaction mass is not considered to have oxidising properties either under the dry form or in aqueous solution.