difluoro(fluorosulphonyl)acetyl fluoride and 3,3,4,4-tetrafluoro-1,2-oxathietane 2,2-dioxide

Explosiveness

Administrative data

Endpoint:

explosiveness, other

Remarks:

Explosive characterics of vapor-gas mixture

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2001

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Data source

Reference

Reference Type:

review article or handbook

Title:

Flammability of Vapor-Gas mixtures C2F4, SO3 and C2F4OSO3

Author:

Ya.A.Lisochkin and V.I.Poznyak

Year:

2001

Bibliographic source:

Fizika Goreniya i Vzryva, Vol 37, N° 5, pp.24-27, September-October, 2001

Materials and methods

Principles of method if other than guideline:

Mixture of C2F4, SO3 and C2F4OSO2 were prepared and tested in an autoclave. The mixture was ignited and the pressure in explosion of the mixture was measured by a fast-response induction gauge.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

3,3,4,4-tetrafluoro-1,2-oxathietane 2,2-dioxide

EC Number:

211-805-3

EC Name:

3,3,4,4-tetrafluoro-1,2-oxathietane 2,2-dioxide

Cas Number:

697-18-7

Molecular formula:

C2F4O3S

IUPAC Name:

3,3,4,4-tetrafluoro-1,2-oxathietane 2,2-dioxide

Results and discussion

Any other information on results incl. tables

Mixture	Initial pressure (MPa)	p max / po	dp/dt max (MPa /sec)
C2F4OSO2	0.3	3.8	2
C2F4	0.3	5.7	13

Pure tetrafluoroethanesultone vapors turned out to be flammable and highly explosive; a regime of flame propagation was registered in initiation of their decomposition. The parameters of explosion of tetrafluoroethylene vapors are noticeably lower than those of C₂F₄.

Applicant's summary and conclusion

Interpretation of results:

other: Pure vapors of tetrafluoroethanesultone are highly explosive

Conclusions:

In the process of obtaining tetrafluoroethanesultone, both the initial and the final products are highly explosive.
The pure vapors of tetrafluoroethanesultone are highly explosive, the possibility of decomposition of the liquid product without access of any oxidizer in the deflagration regime cannot be excluded. Deflagration of the liquid phase is particularly hazardous for storage and use of such products.

Executive summary:

The flammability of the initial and the final product of the process to obtained tetrafluoroethansultone were studied in autoclave. Mixture of C₂F₄, SO₃and/or tetrafluoroethanesultone were made and ignited in this autoclave.

In the process of obtaining tetrafluoroethanesultone, both the initial and the final products are highly explosive.

After ignition, the pure vapors of tetrafluoroethanesultone are highly explosive. The possibility of decomposition of the liquid product without access of any oxidizer in the deflagration regime cannot be excluded. Deflagration of the liquid phase is particularly hazardous for storage and use of such products