1,1,2,3,4,4-hexafluorobuta-1,3-diene

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Reference 2

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.11 (Flammability (Gases))

Deviations:

no

GLP compliance:

yes

Key result

Parameter:

lower explosion limit

Value:

> 5 - < 6 mol%

Key result

Parameter:

upper explosion limit

Remarks on result:

not measured/tested

Interpretation of results:

Category 1 (flammable gases) based on GHS criteria

Conclusions:

The test item is a flammable gases whit a lower explosion limit between 5 and 6 mol%.
The test item is classified as Category 1 (flammable gases) based on GHS criteria.

Executive summary:

The flammable properties of the test item has been determined according to recognized guideline (EU A.11) and under GLP.

The test item possess flammable range. The lower explosion limit in mixture with air is between 5 and 6 mol%.

Based on these results, the test item is classified as Category 1 (extremely flammable gases) based on GHS criteria.

Reference 3

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1999

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

other: DIN 51649, part 1

Deviations:

no

GLP compliance:

yes

Other quality assurance:

other:

Key result

Parameter:

lower explosion limit

Value:

5.5 mol%

Key result

Parameter:

upper explosion limit

Value:

27.2 mol%

room temperature: 23°C to 25°C

temperature of the test vessel: 23°C to 25°C

pressure: atmospheric pressure

Ignition attempts to determine LEL

Test Number	% of test substance (mol%)	% of air (mol%)	duration (s)	result
1	6.0	94.0	0.5	detachment of flame (reaction)
2	5.8	94.2	0.5	detachment of flame (reaction)
3	5.6	94.4	0.5	detachment of flame (reaction)
4	5.4	94.6	0.5	Aureole (halo)
5	5.2	94.8	0.5	Aureole (halo)
6	5.0	95.0	0.5	Aureole (halo)
8	5.5	94.5	0.5	Aureole (halo)
9	5.5	94.5	0.5	Aureole (halo)
10	5.5	94.5	0.5	Aureole (halo)
11	5.5	94.5	0.5	Aureole (halo)
12	5.5	94.5	0.5	Aureole (halo)
13	5.6	94.4	0.5	detachment of flame (reaction)

Ignition attempts to determine UEL

Test Number	% of test substance (mol%)	% of air (mol%)	duration (s)	result
1	25.0	75.0	0.5	strong reaction
2	26.0	74.0	0.5	strong reaction
3	27.0	73.0	0.5	Aureole (halo)
4	27.0	73.0	0.5	Aureole (halo)
5	27.0	73.0	0.5	Aureole (halo)
6	27.0	73.0	0.5	Aureole (halo)
8	27.0	73.0	0.5	detachment of flame (reaction)
9	27.2	72.8	0.5	no reaction
10	27.2	72.8	0.5	Aureole (halo)
11	27.2	72.8	0.5	Aureole (halo)
12	27.2	72.8	0.5	Aureole (halo)
13	27.2	72.8	0.5	Aureole (halo)

Interpretation of results:

Category 1 (flammable gases) based on GHS criteria

Conclusions:

The test item is classified as Category 1 Flammable gases according to GHS criteria.
The lower explosion limit in mixture with air is 5.5 mol%.
The upper explosion limit in mixture with air is 27.2 mol%.

Executive summary:

The flammable properties of the test item has been determined according to recognized guideline (DIN 51649; the test apparatus and test method corresponded to ISO 10156 N°4.2).

The test item possess flammable range. The lower explosion limit in mixture with air is 5.5 mol%. The upper explosion limit in mixture with air is 27.2 mol%.

Based on these results, the test item is classified as Category 1 (flammable gases) based on GHS criteria.

Key value for chemical safety assessment

Flammability:

flammable

Additional information

In a key study (performed according to DIN 51649, part 1) and in a supporting study (performed according to European method EU A.11), a flammability range have been found for the test item. The lower explosion limit found is the same in the both studies (5.5 mol% and between 5 to 6 mol%). The upper explosion limit have been determined only in the key study (27 mol %).

The test item is classified as Category 1 (flammable gases) based on GHS criteria.

Justification for classification or non-classification

Based on these flammability range obtained in the two experimental studies, the test item is classified as Category 1 (flammable gases) based on GHS criteria.

Based on handling and experimental study (water solubility), the test item is know to not emits flammable gases in contact with water